Email: dalibor.jancik@upol.cz
Address: Šlechtitelů 11, Olomouc
Phone: (+420) 58 563 1406
Fax: (+420) 58 563 4958
Publications
2011
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![[DOI]](http://www.rcptm.com/wp-content/plugins/papercite/img/external.png)
S. Klimkova, M. Cernik, L. Lacinova, J. Filip, D. Jancik, and R. Zboril, “Zero-valent iron nanoparticles in treatment of acid mine water from in
situ uranium leaching,” CHEMOSPHERE, vol. 82, iss. 8, pp. 1178-1184, 2011.
[Bibtex]@article ISI:000287432100016, Author = Klimkova, Stepanka and Cernik, Miroslav and Lacinova, Lenka and Filip, Jan and Jancik, Dalibor and Zboril, Radek, Title = Zero-valent iron nanoparticles in treatment of acid mine water from in situ uranium leaching, Journal = CHEMOSPHERE, Year = 2011, Volume = 82, Number = 8, Pages = 1178-1184, Month = FEB, Abstract = Acid mine water from in situ chemical leaching of uranium (Straz pod Ralskem, Czech Republic) was treated in laboratory scale experiments by zero-valent iron nanoparticles (nZVI). For the first time, nZVI were applied for the treatment of the real acid water system containing the miscellaneous mixture of pollutants, where the various removal mechanisms occur simultaneously. Toxicity of the treated saline acid water is caused by major contaminants represented by aluminum and sulphates in a high concentration, as well as by microcontaminants like As, Be, Cd, Cr, Cu, Ni, U, V. and Zn. Laboratory batch experiments proved a significant decrease in concentrations of all the monitored pollutants due to an increase in pH and a decrease in oxidation-reduction potential related to an application of nZVI. The assumed mechanisms of contaminants removal include precipitation of cations in a lower oxidation state, precipitation caused by a simple pH increase and co-precipitation with the formed iron oxyhydroxides. The possibility to control the reaction kinetics through the nature of the surface stabilizing shell (polymer vs. FeO nano-layer) is discussed as an important practical aspect. (C) 2010 Elsevier Ltd. All rights reserved., DOI = 10.1016/j.chemosphere.2010.11.075, ISSN = 0045-6535, Unique-ID = ISI:000287432100016, - K. Siskova, M. Kubala, P. Dallas, D. Jancik, A. Thorel, P. Ilik, and R. Zboril, “The effect of surface modification on the fluorescence and morphology of
CdSe nanoparticles embedded in a 3D phosphazene-based matrix:
nanowire-like quantum dots,” JOURNAL OF MATERIALS CHEMISTRY, vol. 21, iss. 4, pp. 1086-1093, 2011.
[Bibtex]@article ISI:000286110400023, Author = Siskova, Karolina and Kubala, Martin and Dallas, Panagiotis and Jancik, Dalibor and Thorel, Alain and Ilik, Petr and Zboril, Radek, Title = The effect of surface modification on the fluorescence and morphology of CdSe nanoparticles embedded in a 3D phosphazene-based matrix: nanowire-like quantum dots, Journal = JOURNAL OF MATERIALS CHEMISTRY, Year = 2011, Volume = 21, Number = 4, Pages = 1086-1093, Abstract = We have synthesized and characterized a new type of emissive nanocomposite material consisting of a 3D inorganic-organic phosphazene-based polymer and CdSe quantum dots (QDs). The materials uniquely combine and inherit the polymers 3D character and the QD fluorescence properties. Furthermore, we have proven that benzidine molecules are suitable surface-modifiers of QDs resulting in fluorescent, nearly spherical QDs arranged into the unique nanowire-like structure. Moreover, the benzidine-to-CdSe energy transfer has been observed which can be further exploited. Characterization of the as-synthesized materials has been performed by using UV-visible and FT-IR absorption spectroscopy, energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), high resolution-transmission electron microscopy (HR-TEM), scanning electron microscopy (SEM), steady-state and time-resolved fluorescence measurements., DOI = 10.1039/c0jm02360d, ISSN = 0959-9428, Unique-ID = ISI:000286110400023,
2010
- R. Zboril, F. Karlicky, A. B. Bourlinos, T. A. Steriotis, A. K. Stubos, V. Georgakilas, K. Safarova, D. Jancik, C. Trapalis, and M. Otyepka, “Graphene Fluoride: A Stable Stoichiometric Graphene Derivative and its
Chemical Conversion to Graphene,” SMALL, vol. 6, iss. 24, pp. 2885-2891, 2010.
[Bibtex]@article ISI:000285793900015, Author = Zboril, Radek and Karlicky, Frantisek and Bourlinos, Athanasios B. and Steriotis, Theodore A. and Stubos, Athanasios K. and Georgakilas, Vasilios and Safarova, Klara and Jancik, Dalibor and Trapalis, Christos and Otyepka, Michal, Title = Graphene Fluoride: A Stable Stoichiometric Graphene Derivative and its Chemical Conversion to Graphene, Journal = SMALL, Year = 2010, Volume = 6, Number = 24, Pages = 2885-2891, Month = DEC 20, Abstract = Stoichoimetric graphene fluoride monolayers are obtained in a single step by the liquid-phase exfoliation of graphite fluoride with sulfolane. Comparative quantum-mechanical calculations reveal that graphene fluoride is the most thermodynamically stable of five studied hypothetical graphene derivatives; graphane, graphene fluoride, bromide, chloride, and iodide. The graphene fluoride is transformed into graphene via graphene iodide, a spontaneously decomposing intermediate. The calculated bandgaps of graphene halides vary from zero for graphene bromide to 3.1 eV for graphene fluoride. It is possible to design the electronic properties of such two-dimensional crystals., DOI = 10.1002/smll.201001401, ISSN = 1613-6810, Unique-ID = ISI:000285793900015, - V. Halouzka, P. Jakubec, C. Gregor, D. Jancik, K. Papadopoulos, T. Triantis, and J. Hrbac, “Silver-Nafion coated cylindrical carbon fiber microelectrode for
amperometric monitoring of hydrogen peroxide heterogeneous catalytic
decomposition,” CHEMICAL ENGINEERING JOURNAL, vol. 165, iss. 3, pp. 813-818, 2010.
[Bibtex]@article ISI:000285819500008, Author = Halouzka, Vladimir and Jakubec, Petr and Gregor, Cenek and Jancik, Dalibor and Papadopoulos, Kyriakos and Triantis, Theodor and Hrbac, Jan, Title = Silver-Nafion coated cylindrical carbon fiber microelectrode for amperometric monitoring of hydrogen peroxide heterogeneous catalytic decomposition, Journal = CHEMICAL ENGINEERING JOURNAL, Year = 2010, Volume = 165, Number = 3, Pages = 813-818, Month = DEC 15, Abstract = Cylindrical carbon fiber microelectrode coated with a silver layer electrodeposited from silver nitrate solution containing Pluronic F127, a surface active agent, and also a Nafion layer prepared using a dip-dry method forms a sensitive, selective and stable amperometric hydrogen peroxide sensor, operating in the cathodic region of potential. The layer formed at the electrode is composed of porous, partially crystalline silver deposits with a significant fraction of attached silver nanoparticles. Using amperometry in stirred solution at 0 mV (vs. Ag/AgCl), the electrode is capable to monitor hydrogen peroxide over its wide concentration range (1 x 10(-5) up to 0.1 M). The response of the electrode is sufficiently time-stable to enable the monitoring of hydrogen peroxide heterogeneous decomposition over manganese dioxide catalyst including the conditions where higher decomposition rates are observed, impossible to be monitored using batch titration. (C) 2010 Elsevier B.V. All rights reserved., DOI = 10.1016/j.cej.2010.10.023, ISSN = 1385-8947, Unique-ID = ISI:000285819500008, - J. Pinkas, V. Reichlova, A. Serafimidisova, Z. Moravec, R. Zboril, D. Jancik, and P. Bezdicka, “Sonochemical Synthesis of Amorphous Yttrium Iron Oxides Embedded in
Acetate Matrix and their Controlled Thermal Crystallization toward
Garnet (Y(3)Fe(5)O(12)) and Perovskite (YFeO(3)) Nanostructures,” JOURNAL OF PHYSICAL CHEMISTRY C, vol. 114, iss. 32, pp. 13557-13564, 2010.
[Bibtex]@article ISI:000280727500022, Author = Pinkas, Jiri and Reichlova, Vendula and Serafimidisova, Aneta and Moravec, Zdenek and Zboril, Radek and Jancik, Dalibor and Bezdicka, Petr, Title = Sonochemical Synthesis of Amorphous Yttrium Iron Oxides Embedded in Acetate Matrix and their Controlled Thermal Crystallization toward Garnet (Y(3)Fe(5)O(12)) and Perovskite (YFeO(3)) Nanostructures, Journal = JOURNAL OF PHYSICAL CHEMISTRY C, Year = 2010, Volume = 114, Number = 32, Pages = 13557-13564, Month = AUG 19, Abstract = Sonolysis of stoichiometric mixtures of tris(2,4-pentanedionato)iron, Fe(acac)(3), and tris(2,4-pentanedionato)yttrium, Y(acac)(3)(H(2)O)(3), under Ar atmosphere in tetraglyme led to a colloidal solution from which amorphous Y-Fe-O nanopowders could be precipitated by hexane. These powders are composed of amorphous nanoparticles (3 nm) of yttrium iron(III) oxide embedded in an acetate matrix as proved by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), mass spectrometry, and Mossbauer and IR spectroscopy. The increasing amount (0, 2, 6\%) of added water in the reaction mixture was found to lower the organics content in the sonochemical products. The thermally induced crystallization of the amorphous Y-Fe-O nanoparticles was studied by thermal analysis (TG/DSC), evolved gas analysis (EGA), high-temperature XRD, and Mossbauer spectroscopy. Depending on the Y/Fe starting stoichiometric ratio in the sonicated reaction mixture, the single-phase YFeO(3) (YIP) with the perovskite structure or Y(3)Fe(5)O(12) (YIG) with the garnet structure can be synthesized by such controlled thermal transformation. The single-phase character of crystallized samples and the well-defined structure of both YIP and YIG nanoparticles were confirmed by XRD and Mossbauer spectra excluding the presence of any other phases in the reaction products. The hyperfine parameters of magnetically ordered spectrum of YIP reflect the octahedral environment of high-spin Fe(III) in the perovskite structure, while two nonequivalent octahedral and tetrahedral Fe(III) positions were identified in the YIG garnet spectrum., DOI = 10.1021/jp104091n, ISSN = 1932-7447, Unique-ID = ISI:000280727500022, - P. Dallas, J. Tucek, D. Jancik, M. Kolar, A. Panacek, and R. Zboril, “Magnetically Controllable Silver Nanocomposite with Multifunctional
Phosphotriazine Matrix and High Antimicrobial Activity,” ADVANCED FUNCTIONAL MATERIALS, vol. 20, iss. 14, pp. 2347-2354, 2010.
[Bibtex]@article ISI:000280427000019, Author = Dallas, Panagiotis and Tucek, Jiri and Jancik, Dalibor and Kolar, Milan and Panacek, Ales and Zboril, Radek, Title = Magnetically Controllable Silver Nanocomposite with Multifunctional Phosphotriazine Matrix and High Antimicrobial Activity, Journal = ADVANCED FUNCTIONAL MATERIALS, Year = 2010, Volume = 20, Number = 14, Pages = 2347-2354, Month = JUL 23, Abstract = A recently developed multi-functional phosphotriazine-based polymer is used as a matrix for embedding gamma-Fe(2)O(3) nanoparticles as well as a suitable chemical template for surface modification with silver nanoparticles. For the; primary magnetic modification, maghemite nanoparticles are surface modified with oleic acid in order to render them organophilic and to prevent the aggregation of the nanoparticles. This aggregation could occur as the polymer synthesis, based on reaction of phosphonitrilic chlorine and 1,4phenylenediamine, takes place in toluene. The surface active amine units of the polymer structure enable the reduction of silver cations to silver nanoparticles, which are well attached and finely dispersed on its surface. The developed nanocomposite represents one of the few magnetically controllable antibacterial agents based on silver nanoparticles. Magnetic measurements reveal the completely suppressed interactions among maghemite nanoparticles because of their perfect surface coating with an organic surfactant and fine dispersion inside the polymer matrix. This magnetic nanocomposite exhibits a high antibacterial and antifungal activity as proven by tests with nine bacterial strains and four candida (yeast genus) species. For the majority of the tested species, the minimum-inhibition concentrations are below 100 mg L(-1), which is comparable to their equivalent minimum-inhibition concentrations in colloidal silver systems., DOI = 10.1002/adfm.200902370, ISSN = 1616-301X, Unique-ID = ISI:000280427000019, - C. Gregor, M. Hermanek, D. Jancik, J. Pechousek, J. Filip, J. Hrbac, and R. Zboril, “The Effect of Surface Area and Crystal Structure on the Catalytic
Efficiency of Iron(III) Oxide Nanoparticles in Hydrogen Peroxide
Decomposition,” EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, iss. 16, pp. 2343-2351, 2010.
[Bibtex]@article ISI:000278888300003, Author = Gregor, Cenek and Hermanek, Martin and Jancik, Dalibor and Pechousek, Jiri and Filip, Jan and Hrbac, Jan and Zboril, Radek, Title = The Effect of Surface Area and Crystal Structure on the Catalytic Efficiency of Iron(III) Oxide Nanoparticles in Hydrogen Peroxide Decomposition, Journal = EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Year = 2010, Number = 16, Pages = 2343-2351, Month = JUN, Abstract = Iron(II) oxalate dihydrate has been used as a readily decomposable substance for the controlled synthesis of nanosized iron(III) oxides. The polymorphous composition, particle size and surface area of these iron oxide nanoparticles were controlled by varying the reaction temperature between 185 and 500 degrees C. As-prepared samples were characterized by XRD, low-temperature and in-field Mossbauer spectroscopy, BET surface area and the TEM technique. They were also tested as heterogeneous catalysts in hydrogen peroxide decomposition. At the selected temperatures, the formed nanomaterials did not contain any traces of amorphous phase, which is known to considerably reduce the catalytic efficiency of iron(III) oxide catalysts. As the thickness of the sample (approximate to 2 mm) was above the critical value, a temporary temperature increase (''exo effect'') was observed during all quasi-isothermal decompositions studied, irrespective of the reaction temperature. Increasing the reaction temperature resulted in a shift of the exo effect towards shorter times and an increased content of maghemite phase. The maghemite content decreases above 350 degrees C as a result of a thermally induced polymorphous transition into hematite. The catalytic data demonstrate that the crystal structure of iron(III) oxide (i.e. the relative contents of maghemite and hematite) does not influence the rate of hydrogen peroxide decomposition. However, the rate constant increases monotonously with increasing sample surface area (and decreasing thermolysis temperature), reaching a maximum of 27 x 10(-3) min(-1)(g/L)(-1) for the sample with a surface area of 285 m(2)g(-1). This rate constant is currently the highest reported value of all known iron oxide catalytic systems and is even slightly higher than that observed for the most efficient catalyst reported to date, which has a significantly larger surface area of 337 m(2)g(-1). This surprisingly high catalytic activity at relatively low surface area can be ascribed to the absence of a amorphous phase in the samples prepared in this study. Taking into account these new findings, the contributions of the key factors highlighted above (surface area, particle size, crystal structure, crystallinity) to the overall activity of iron oxides for hydrogen peroxide decomposition are discussed., DOI = 10.1002/ejic.200901066, ISSN = 1434-1948, Unique-ID = ISI:000278888300003, - P. Dallas, R. Zboril, A. B. Bourlinos, D. Jancik, D. Niarchos, A. Panacek, and D. Petridis, “Cornet-Like Phosphotriazine/Diamine Polymers as Reductant and Matrix for
the Synthesis of Silver Nanocomposites with Antimicrobial Activity,” MACROMOLECULAR MATERIALS AND ENGINEERING, vol. 295, iss. 2, pp. 108-114, 2010.
[Bibtex]@article ISI:000275287400003, Author = Dallas, Panagiotis and Zboril, Radek and Bourlinos, Athanasios B. and Jancik, Dalibor and Niarchos, Dimitrios and Panacek, Ales and Petridis, Dimitrios, Title = Cornet-Like Phosphotriazine/Diamine Polymers as Reductant and Matrix for the Synthesis of Silver Nanocomposites with Antimicrobial Activity, Journal = MACROMOLECULAR MATERIALS AND ENGINEERING, Year = 2010, Volume = 295, Number = 2, Pages = 108-114, Month = FEB 12, Abstract = The synthesis of silver nanoparticles attached on the surface of a hollow cornet-like polymer matrix which served as a reductant and host matrix is described. This hybrid organic/inorganic macromolecular matrix is exhibiting anion-exchange properties, porous structure and hollow morphologies, and absorptions in the visible light region. Due to the anion-exchange property and the 3D orientation of the macromolecular chains the material is defining a new functional organic/inorganic hybrid. For the synthesis of nanoparticles, no other reducing agents were used and silver nanoparticles with a mean diameter of less than 20 nm were attached on the surface of the polymer, thus inheriting the composite with high antibacterial activity tested in bacterial strains and yeasts., DOI = 10.1002/mame.200900258, ISSN = 1438-7492, Unique-ID = ISI:000275287400003, - J. Matejkova-Plskova, D. Jancik, M. Maslan, S. Shiojiri, and M. Shiojiri, “Photonic Crystal Structure of Wing Scales in Sasakia Charonda
Butterflies,” MATERIALS TRANSACTIONS, vol. 51, iss. 2, pp. 202-208, 2010.
[Bibtex]@article ISI:000276538900002, Author = Matejkova-Plskova, Jirina and Jancik, Dalibor and Maslan, Miroslav and Shiojiri, Satoshi and Shiojiri, Makoto, Title = Photonic Crystal Structure of Wing Scales in Sasakia Charonda Butterflies, Journal = MATERIALS TRANSACTIONS, Year = 2010, Volume = 51, Number = 2, Pages = 202-208, Month = FEB, Abstract = The hindwings of the male Sasakia charonda charonda butterflies comprise iridescent purple-blue areas, iridescent white-pearl areas. yellow spots and red spots as well as brown background. We have examined the microstructure of their scales by scanning electron microscopy, for applying their photonic crystal structures to fine light manipulators such as reflection elements in laser diodes. The scales in the yellow spots, red spots and brown background have almost the same structure, which is an optical diffraction grating made of ridges with two cuticle layers. Their difference comes from the contained pigments. The scales in the iridescent purple-blue and white-pearl are also the same in structure. They have seven tilted cuticle layers lapped on the ridges, which also constitute a grating. The widths of the ridge and groove in the grating are different between scales of the two kinds. It is shown that the vivid iridescence is mainly attributed to multiple interferences caused between rays reflected from the seven cuticle layers with air gaps. [doi:10.2320/matertrans.MC200903], DOI = 10.2320/matertrans.MC200903, ISSN = 1345-9678, Unique-ID = ISI:000276538900002, - J. Kukutschova, V. Roubicek, M. Maslan, D. Jancik, V. Slovak, K. Malachova, Z. Pavlickova, and P. Filip, “Wear performance and wear debris of semimetallic automotive brake
materials,” WEAR, vol. 268, iss. 1-2, pp. 86-93, 2010.
[Bibtex]@article ISI:000272919500010, Author = Kukutschova, Jana and Roubicek, Vaclav and Maslan, Miroslav and Jancik, Dalibor and Slovak, Vaclav and Malachova, Katerina and Pavlickova, Zuzana and Filip, Peter, Title = Wear performance and wear debris of semimetallic automotive brake materials, Journal = WEAR, Year = 2010, Volume = 268, Number = 1-2, Pages = 86-93, Month = JAN 4, Abstract = Wear performance of automotive brake material is addressed and debris collected after brake dynamometer test and after ball-milling of identical semimetallic friction lining is characterized using a combination of analytical techniques. The differences between dynamometer wear debris and ball-milled samples are demonstrated. Wear debris is typified by the presence of numerous nanoparticles formed during wear process. Their chemistry resembles the chemistry of friction layer described previously. Contradicting findings by different research groups addressing automotive wear particulates are discussed and further refinement of analytical and testing techniques as well as their combination is suggested. Published by Elsevier B.V., DOI = 10.1016/j.wear.2009.06.039, ISSN = 0043-1648, Unique-ID = ISI:000272919500010, - J. Pechousek, R. Prochazka, D. Jancik, J. Frydrych, and M. Mashlan, “Universal LabVIEW-powered Mossbauer spectrometer based on USB, PCI or
PXI devices,” in INTERNATIONAL CONFERENCE ON THE APPLICATIONS OF THE MOSSBAUER EFFECT
(ICAME 2009), 2010.
[Bibtex]@inproceedings ISI:000287181700006, Author = Pechousek, J. and Prochazka, R. and Jancik, D. and Frydrych, J. and Mashlan, M., Editor = Muller, H and Reissner, M and Steiner, W and Wiesinger, G, Title = Universal LabVIEW-powered Mossbauer spectrometer based on USB, PCI or PXI devices, Booktitle = INTERNATIONAL CONFERENCE ON THE APPLICATIONS OF THE MOSSBAUER EFFECT (ICAME 2009), Series = Journal of Physics Conference Series, Year = 2010, Volume = 217, Note = International Conference on the Applications of the Mossbauer Effect, Vienna Univ Technol, Vienna, AUSTRIA, JUL 19-24, 2009, Abstract = A new design of the universal Mossbauer spectrometer is presented. Hardware solution is based on commercial-available data acquisition devices working on the USB, PCI or PXI platform controlled by the main application running on the personal computer. Final application allows, in addition to Mossbauer spectra accumulation, the detailed analysis of the acquired detector signal in energy and time domains, and also to tune the velocity driving system separately. The experimental results show a high flexibility in various detectors and velocity transducers usage. It is easy to change the way of operation according to the different experimental requirements. This concept can be used with all common spectrometric benches with different velocity transducers, radioactive sources and gamma-ray detectors. This is a new approach in the Mossbauer spectrometer construction., DOI = 10.1088/1742-6596/217/1/012006, Article-Number = 012006, ISSN = 1742-6588, Unique-ID = ISI:000287181700006, - J. Pechousek, R. Prochazka, J. Cuda, J. Frydrych, and D. Jancik, “Investigation of the Mossbauer Spectrum Quality as a Dependence on the
Frequency of the Velocity Signal,” in MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE – 2010, 2010, pp. 134-142.
[Bibtex]@inproceedings ISI:000281606200019, Author = Pechousek, J. and Prochazka, R. and Cuda, J. and Frydrych, J. and Jancik, D., Editor = Tucek, J and Miglierini, M, Title = Investigation of the Mossbauer Spectrum Quality as a Dependence on the Frequency of the Velocity Signal, Booktitle = MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE - 2010, Series = AIP Conference Proceedings, Year = 2010, Volume = 1258, Pages = 134-142, Note = International Conference on Mossbauer Spectroscopy in Materials Science, Liptovsky Jan, SLOVAKIA, JAN 31-FEB 05, 2010, Abstract = This paper is focused on a quality characterizing the Mossbauer spectra measured for various frequencies of the velocity signal. Standard electromechanical double-loudspeaker drive and digital PID velocity controller were used for calibration spectra measurement in the frequency interval from 4 up to 100 Hz. Several parameters were evaluated for recommendation of the suitable velocity signal frequency., DOI = 10.1063/1.3473890, ISSN = 0094-243X, ISBN = 978-0-7354-0806-7, Unique-ID = ISI:000281606200019,
2009
- Y. Jiraskova, K. Zabransky, I. Turek, J. Bursik, and D. Jancik, “Microstructure and physical properties of mechanically alloyed Fe-Mo
powder,” JOURNAL OF ALLOYS AND COMPOUNDS, vol. 477, iss. 1-2, pp. 55-61, 2009.
[Bibtex]@article ISI:000266386400024, Author = Jiraskova, Y. and Zabransky, K. and Turek, I. and Bursik, J. and Jancik, D., Title = Microstructure and physical properties of mechanically alloyed Fe-Mo powder, Journal = JOURNAL OF ALLOYS AND COMPOUNDS, Year = 2009, Volume = 477, Number = 1-2, Pages = 55-61, Month = MAY 27, Abstract = Solid-state reactions in Fe(74)Mo(26) powder mixture induced by mechanical alloying (MA) are followed by (57)Fe Mossbauer spectroscopy supported by additional experimental methods. It is established that a bcc-Fe(Mo) solid solution with an enhanced Mo content substantially exceeding the equilibrium solubility limit, a bcc-Mo(Fe) solid solution, and an amorphous and/or highly defected phase have been formed during the MA. The mean particle size of 100 nm is obtained at the end of milling process. Surface regions of the particles are formed by the amorphous phase containing also iron grains smaller than 20 nm, as proved by transmission electron microscopy and selective area electron diffraction. A varying composition of FeMo powder samples and grain refinement are reflected in changes of hyperfine interactions and macroscopic magnetic characteristics. (C) 2008 Elsevier B.V. All rights reserved., DOI = 10.1016/j.jallcom.2008.11.006, ISSN = 0925-8388, Unique-ID = ISI:000266386400024, - K. Kluchova, R. Zboril, J. Tucek, M. Pecova, L. Zajoncova, I. Safarik, M. Mashlan, I. Markova, D. Jancik, M. Sebela, H. Bartonkova, V. Bellesi, P. Novak, and D. Petridis, “Superparamagnetic maghemite nanoparticles from solid-state synthesis -
Their functionalization towards peroral MRI contrast agent and magnetic
carrier for trypsin immobilization,” BIOMATERIALS, vol. 30, iss. 15, pp. 2855-2863, 2009.
[Bibtex]@article ISI:000265328100001, Author = Kluchova, Katerina and Zboril, Radek and Tucek, Jiri and Pecova, Michaela and Zajoncova, Ludmila and Safarik, Ivo and Mashlan, Miroslav and Markova, Ingrid and Jancik, Dalibor and Sebela, Marek and Bartonkova, Helena and Bellesi, Vassiliki and Novak, Pavel and Petridis, Dimitris, Title = Superparamagnetic maghemite nanoparticles from solid-state synthesis - Their functionalization towards peroral MRI contrast agent and magnetic carrier for trypsin immobilization, Journal = BIOMATERIALS, Year = 2009, Volume = 30, Number = 15, Pages = 2855-2863, Month = MAY, Abstract = Nearly monodispersed superparamagnetic maghemite nanoparticles (15-20 nm) were prepared by a one-step thermal decomposition of iron(II) acetate in air at 400 degrees C. The presented synthetic route is simple, cost effective and allows to prepare the high-quality superparamagnetic particles in a large scale. The as-prepared particles were exploited for the development of magnetic nanocomposites with the possible applicability in medicine and biochemistry. For the purposes of the MRI diagnostics, the maghemite particles were simply dispersed in the bentonite matrix. The resulting nanocomposite represents very effective and cheap oral negative contrast agent for MRI of the gastrointestinal tract and reveals excellent contrast properties, fully comparable with those obtained for commercial contrast material. The results of the clinical research of this maghemite-bentonite contrast agent for imaging of the small bowel are discussed. For biochemical applications, the primary functionalization of the prepared maghemite nanoparticles with chitosan was performed. In this way, a highly efficient magnetic carrier for protein immobilization was obtained as demonstrated by conjugating thermostable raffinose-modified trypsin (RMT) using glutaraldehyde. The covalent conjugation resulted in a further increase in trypsin thermostability (T(50) = 61 degrees C) and elimination of its autolysis. Consequently, the immobilization of RMT allowed fast in-solution digestion of proteins and their identification by MALDI-TOF mass spectrometry. (C) 2009 Elsevier Ltd. All rights reserved., DOI = 10.1016/j.biomaterials.2009.02.023, ISSN = 0142-9612, Unique-ID = ISI:000265328100001, - V. Belessi, D. Lambropoulou, I. Konstantinou, R. Zboril, J. Tucek, D. Jancik, T. Albanis, and D. Petridis, “Structure and photocatalytic performance of magnetically separable
titania photocatalysts for the degradation of propachlor,” APPLIED CATALYSIS B-ENVIRONMENTAL, vol. 87, iss. 3-4, pp. 181-189, 2009.
[Bibtex]@article ISI:000264948000006, Author = Belessi, V. and Lambropoulou, D. and Konstantinou, I. and Zboril, R. and Tucek, J. and Jancik, D. and Albanis, T. and Petridis, D., Title = Structure and photocatalytic performance of magnetically separable titania photocatalysts for the degradation of propachlor, Journal = APPLIED CATALYSIS B-ENVIRONMENTAL, Year = 2009, Volume = 87, Number = 3-4, Pages = 181-189, Month = APR 7, Abstract = A magnetic photocatalyst was prepared by modification of TiO(2) nanoparticles (Degussa P25) with nanocrystalline gamma-Fe(2)O(3) nanoparticles through a protective lining made up of two oppositely charged polyelectrolytes. As-prepared magnetically separable photocatalysts differing in gamma-Fe(2)O(3) loading (3, 8, 13, 20 and 30 wt.\%) were characterized by XRD, TEM, thermal analysis, Mossbauer and magnetic measurements. The photocatalytic efficiency of the nanocomposite catalysts was evaluated using a chloroacetanilide herbicide (propachlor) in water as model compound. The primary degradation of propachlor followed pseudo-first-order kinetics according to the Langmuir-Hinshelwood model. Generally, all magnetic photocatalysts exhibit good catalytic activity towards organic pollutants, do not suffer from photodissolution and can be reused several times without any decrease in their photocatalytic activity. (C) 2008 Published by Elsevier B.V., DOI = 10.1016/j.apcatb.2008.09.012, ISSN = 0926-3373, Unique-ID = ISI:000264948000006, - J. Pechousek, D. Jancik, V. Evdokimov, and R. Prochazka, “Velocity driving system for an in-field Mossbauer spectrometer,” NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
INTERACTIONS WITH MATERIALS AND ATOMS, vol. 267, iss. 5, pp. 846-848, 2009.
[Bibtex]@article ISI:000264984600021, Author = Pechousek, Jiri and Jancik, Dalibor and Evdokimov, Viktor and Prochazka, Roman, Title = Velocity driving system for an in-field Mossbauer spectrometer, Journal = NUCLEAR INSTRUMENTS \& METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, Year = 2009, Volume = 267, Number = 5, Pages = 846-848, Month = MAR, Abstract = The velocity driving system for an in-field Mossbauer spectrometer with a constant acceleration mode is described. The driving system uses a digital proportional-integral-derivative velocity controller based on the Field Programmable Gate Array in the National Instruments CompactRIO system. This novel approach is able to drive the transducer in wide range of measurement conditions and eliminates external magnetic field disturbances. The frequency characteristics of stray fields of 5 T and 8 T were measured and analyzed. The nonlinearity of the velocity scales is better than 0.2\%. (C) 2009 Elsevier B.V. All rights reserved., DOI = 10.1016/j.nimb.2009.01.033, ISSN = 0168-583X, Unique-ID = ISI:000264984600021, - L. Machala, R. Zboril, V. K. Sharma, J. Filip, D. Jancik, and Z. Homonnay, “Transformation of Solid Potassium Ferrate(VI) (K(2)FeO(4)): Mechanism
and Kinetic Effect of Air Humidity,” EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, iss. 8, pp. 1060-1067, 2009.
[Bibtex]@article ISI:000264683200010, Author = Machala, Libor and Zboril, Radek and Sharma, Virender K. and Filip, Jan and Jancik, Dalibor and Homonnay, Zoltan, Title = Transformation of Solid Potassium Ferrate(VI) (K(2)FeO(4)): Mechanism and Kinetic Effect of Air Humidity, Journal = EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Year = 2009, Number = 8, Pages = 1060-1067, Month = MAR, Abstract = The kinetics of solid-state transformation (aging) of potassium ferrate(VI) (K(2)FeO(4)) under various air-humidity conditions (55-95\% relative humidity) at room temperature were studied by in-situ Mossbauer spectroscopy. The kinetic data showed a significant increase in the decomposition rate with increasing air humidity. The decomposition kinetics is very unusual with two almost linear decay steps. The first slow decay was observable at rather lower humidity levels (55-70\%) probably due to the formation of the narrow compact layer of nanoparticulate Fe(OH)(3) reaction product. This layer limits the access of both H(2)O and CO(2) participating in the reaction as the gaseous reactants. The second decay with much faster rate showed a nearly positive linear relationship with the humidity. The identification and characterization of the final products of aging were conducted by using X-ray diffraction (XRD), variable-temperature and in-field Mossbauer spectroscopy, magnetic measurements, thermogravimetry (TG) and differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) techniques. The reaction mechanism, assuming formation of KHCO(3) and Fe(OH)(3) in the molar ratio of 2:1 per 1 mol of solid K(2)FeO(4) was suggested. The SEM images revealed the formation of large KHCO(3) crystallites whose surface was covered by ultrasmall X-ray amorphous iron(III) hydroxide nanoparticles in a high degree of agglomeration. The obtained results of aging under humid conditions are important for the possible storage of K(2)FeO(4) and thus for its environmental and industrial applications. ((C) Wiley-VCH Verlag GmbH \& Co. KGaA, 69451 Weinheim, Germany, 2009), DOI = 10.1002/ejic.200801068, ISSN = 1434-1948, Unique-ID = ISI:000264683200010, - J. Pechousek, R. Prochazka, M. Mashlan, D. Jancik, and J. Frydrych, “Digital proportional-integral-derivative velocity controller of a
Mossbauer spectrometer,” MEASUREMENT SCIENCE & TECHNOLOGY, vol. 20, iss. 1, 2009.
[Bibtex]@article ISI:000261627800038, Author = Pechousek, J. and Prochazka, R. and Mashlan, M. and Jancik, D. and Frydrych, J., Title = Digital proportional-integral-derivative velocity controller of a Mossbauer spectrometer, Journal = MEASUREMENT SCIENCE \& TECHNOLOGY, Year = 2009, Volume = 20, Number = 1, Month = JAN, Abstract = The digital proportional-integral-derivative (PID) velocity controller used in the Mossbauer spectrometer implemented in field programmable gate array (FPGA) is based on the National Instruments CompactRIO embedded system and LabVIEW graphical programming tools. The system works as a remote system accessible via the Ethernet. The digital controller operates in real-time conditions, and the maximum sampling frequency is approximately 227 kS s(-1). The system was tested with standard sample measurements of alpha-Fe and alpha-(57)Fe(2)O(3) on two different electromechanical velocity transducers. The nonlinearities of the velocity scales in the relative form are better than 0.2\%. The replacement of the standard analog PID controller by the new system brings the possibility of optimizing the control process more precisely., DOI = 10.1088/0957-0233/20/1/017001, Article-Number = 017001, ISSN = 0957-0233, Unique-ID = ISI:000261627800038, - R. Prucek, L. Kvitek, A. Panacek, L. Vancurova, J. Soukupova, D. Jancik, and R. Zboril, “Polyacrylate-assisted synthesis of stable copper nanoparticles and
copper(I) oxide nanocubes with high catalytic efficiency,” JOURNAL OF MATERIALS CHEMISTRY, vol. 19, iss. 44, pp. 8463-8469, 2009.
[Bibtex]@article ISI:000271744600027, Author = Prucek, Robert and Kvitek, Libor and Panacek, Ales and Vancurova, Lenka and Soukupova, Jana and Jancik, Dalibor and Zboril, Radek, Title = Polyacrylate-assisted synthesis of stable copper nanoparticles and copper(I) oxide nanocubes with high catalytic efficiency, Journal = JOURNAL OF MATERIALS CHEMISTRY, Year = 2009, Volume = 19, Number = 44, Pages = 8463-8469, Abstract = The synthesis of Cu nanoparticles (NPs) via the reduction of Cu ions with sodium borohydride in the presence of sodium polyacrylate is presented. The final Cu nanocrystals having a 14 nm diameter were generated via the aggregation and coalescence of the primarily formed ultrasmall particles (approx. 3 nm). Addition of sodium sulfite to the dispersions provided the protection of the Cu NPs against oxidation. On the other hand, the controlled aeration of the Cu NPs resulted in their transformation to Cu(2)O nanocubes with an average size of 18 nm. Both Cu NPs and Cu(2)O nanocubes can effectively catalyze reduction of 4-nitrophenol by sodium borohydride in aqueous solution., DOI = 10.1039/b913561h, ISSN = 0959-9428, Unique-ID = ISI:000271744600027, - M. Mashlan, H. Bartonkova, D. Jancik, J. Tucek, and P. Martinec, “Iron oxide modified minerals,” in ISIAME 2008, 2009, pp. 481-487.
[Bibtex]@inproceedings ISI:000273775100063, Author = Mashlan, M. and Bartonkova, H. and Jancik, D. and Tucek, J. and Martinec, P., Editor = Kuzmann, E and Lazar, K, Title = Iron oxide modified minerals, Booktitle = ISIAME 2008, Year = 2009, Pages = 481-487, Note = 7th International Symposium on the Industrial Applications of the Mossbauer Effect (ISIAME 2008), Eotvos Lorand Univ, Budapest, HUNGARY, AUG 17-22, 2008, Organization = Inst Isotopes; Hungarian Chem Soc, Abstract = Composites of iron oxide nanoparticles immobilized on the surface of various clay mineral matrices (muscovite, montmorillonite and vermiculite) have been prepared by the alkaline oxidative hydrolysis of iron sulphate in the presence of mineral matrices. The composites have been studied by Mossbauer spectroscopy, XRD, TEM and SQUID. Correspondence between the hyperfine parameters and the iron oxide particle size and magnetic behaviour has been proved. The prepared composites differ in magnetic properties., size and morphology of the iron oxide particles., DOI = 10.1007/978-3-642-01369-0\_64, ISBN = 978-3-642-01369-0, Unique-ID = ISI:000273775100063,
2008
- A. B. Bourlinos, V. Georgakilas, R. Zboril, D. Jancik, M. A. Karakassides, A. Stassinopoulos, D. Anglos, and E. P. Giannelis, “Reaction of graphite fluoride with NaOH-KOH eutectic,” JOURNAL OF FLUORINE CHEMISTRY, vol. 129, iss. 8, pp. 720-724, 2008.
[Bibtex]@article ISI:000259723000011, Author = Bourlinos, Athanasios B. and Georgakilas, Vasilios and Zboril, Radek and Jancik, Dalibor and Karakassides, Michael A. and Stassinopoulos, Andreas and Anglos, Demetrios and Giannelis, Emmanuel P., Title = Reaction of graphite fluoride with NaOH-KOH eutectic, Journal = JOURNAL OF FLUORINE CHEMISTRY, Year = 2008, Volume = 129, Number = 8, Pages = 720-724, Month = AUG, Abstract = Graphite fluoride has been generally considered chemically inert against strong alkalis under ambient conditions. In the present study we demonstrate that treatment of graphite fluoride with eutectic NaOH-KOH mixture at 250 degrees C induces dramatic structural and textural changes in the solid as evidenced by XRD, FT-IR, Raman, UV-vis absorption and fluorescence and microscopy techniques (TEM, AFM). The reaction proceeds in the molten state leading to water-soluble, graphitized carbon particles which unlike graphite fluoride, adopt a variety of morphologies, like platy, tetragonal, triangular, discoid and spherical. The resulting carbon particles are dispersible in water and fluoresce under UV excitation. (c) 2008 Elsevier B.V. All rights reserved., DOI = 10.1016/j.jfluchem.2008.05.020, ISSN = 0022-1139, Unique-ID = ISI:000259723000011, - J. Frydrych, M. Mashlan, J. Pechousek, and D. Jancik, “Conversion Electron Detectors for (57)Fe Mossbauer Measurements,” in MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE 2008, 2008, pp. 170-184.
[Bibtex]@inproceedings ISI:000262290200021, Author = Frydrych, J. and Mashlan, M. and Pechousek, J. and Jancik, D., Editor = Mashlan, M and Zboril, R, Title = Conversion Electron Detectors for (57)Fe Mossbauer Measurements, Booktitle = MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE 2008, Series = AIP Conference Proceedings, Year = 2008, Volume = 1070, Pages = 170-184, Note = International Conference on Mossbauer Spectroscopy in Materials Science, Hlohovec u Breclavi, CZECH REPUBLIC, JUN 16-20, 2008, Abstract = This review article is intended to help all those, who now begin to work in the field of conversion electron Mossbauer spectroscopy (CEMS) and who have to select a right type of a detector. There exist a large number of specific engineering designs in each of the detector kind, which is impossible to cover in one paper. That is why we only try to outline basic classification and general survey of properties of individual CEMS detector kinds supplemented by references to its more detailed analysis. (57)Fe is the most frequently used isotope in CEMS and thereby the paper is devoted to this case., ISSN = 0094-243X, ISBN = 978-0-7354-0601-8, Unique-ID = ISI:000262290200021,
2007
- H. Bartonkova, M. Mashlan, I. Medrik, D. Jancik, and R. Zboril, “Magnetically modified bentonite as a possible contrast agent in MRI of
gastrointestinal tract,” CHEMICAL PAPERS, vol. 61, iss. 5, pp. 413-416, 2007.
[Bibtex]@article ISI:000248628000014, Author = Bartonkova, H. and Mashlan, M. and Medrik, I. and Jancik, D. and Zboril, R., Title = Magnetically modified bentonite as a possible contrast agent in MRI of gastrointestinal tract, Journal = CHEMICAL PAPERS, Year = 2007, Volume = 61, Number = 5, Pages = 413-416, Month = OCT, Abstract = A composite of iron oxide nanoparticles and mineral matrix has been studied by XRD, Mossbauer spectroscopy, and TEM. Magnetite and superparamagnetic magnetite have been identified by Mossbauer spectroscopy in the nanocomposite. A relationship between the hyperfine parameters and iron oxide particle size has been confirmed by TEM. The optimal concentration of ``magnetite-bentonite'' composite, when the MRI signal is fully reduced, was found for using this composite as a negative contrast agent., DOI = 10.2478/s11696-007-0057-9, ISSN = 0366-6352, Unique-ID = ISI:000248628000014, - J. Pechousek, M. Mashlan, J. Frydrych, D. Jancik, and R. Prochazka, “Improving detector signal processing with pulse height analysis in
Mossbauer spectrometers,” HYPERFINE INTERACTIONS, vol. 175, iss. 1-3, pp. 1-8, 2007.
[Bibtex]@article ISI:000256911000001, Author = Pechousek, Jiri and Mashlan, Miroslav and Frydrych, Jiri and Jancik, Dalibor and Prochazka, Roman, Title = Improving detector signal processing with pulse height analysis in Mossbauer spectrometers, Journal = HYPERFINE INTERACTIONS, Year = 2007, Volume = 175, Number = 1-3, Pages = 1-8, Month = FEB, Abstract = A plenty of different programming techniques and instrument solutions are used in the development of Mossbauer spectrometers. Each of them should provide a faster spectrum accumulation process, increased productivity of measurements, decreased nonlinearity of the velocity scale, etc. The well known virtual instrumentation programming method has been used to design a computer-based Mossbauer spectrometer. Hardware solution was based on two commercially-available PCI modules produced by National Instruments Co. Virtual Mossbauer spectrometer is implemented by the graphical programming language LabVIEW 7 Express. This design environment allows to emulate the multichannel analyzer on the digital oscilloscope platform. This is a novel method based on Waveform Peak Detection function which allows detailed analysis of the acquired signal. The optimal treatment of the detector signal from various detector types is achieved by mathematical processing only. As a result, the possibility of an increase of signal/noise ratio is presented., DOI = 10.1007/s10751-008-9580-5, ISSN = 0304-3843, Unique-ID = ISI:000256911000001,
2006
- R. Prochazka, M. Maslan, J. Pechousek, and D. Jancik, “Optimizing the features of the single-channel analyzer towards
improvement of productivity of Mossbauer,” CZECHOSLOVAK JOURNAL OF PHYSICS, vol. 56, iss. E, pp. E133-E137, 2006.
[Bibtex]@article ISI:000249124100015, Author = Prochazka, R. and Maslan, M. and Pechousek, J. and Jancik, D., Title = Optimizing the features of the single-channel analyzer towards improvement of productivity of Mossbauer, Journal = CZECHOSLOVAK JOURNAL OF PHYSICS, Year = 2006, Volume = 56, Number = E, Pages = E133-E137, Note = International Colloquium on Mossbauer Spectroscopy in Materials Science, Kocovce, SLOVAKIA, JUN 11-15, 2006, Abstract = The statistical quality (productivity) of the Mossbauer spectra is one of the most important features characterizing the Mossbauer spectrometer. Optimizing the discrimination part of the spectrometer including the novel way of selection represents a route how to increase the spectrum productivity., DOI = 10.1007/s10582-006-0479-6, ISSN = 0011-4626, Unique-ID = ISI:000249124100015,
2005
- D. Jancik, M. Mashlan, R. Zboril, J. Adetunji, and K. Nomura, “A new fast type of Mossbauer spectrometer for the rapid determination of
iron-bearing minerals used in the paint industry,” CZECHOSLOVAK JOURNAL OF PHYSICS, vol. 55, iss. 7, pp. 803-811, 2005.
[Bibtex]@article ISI:000231635800005, Author = Jancik, D and Mashlan, M and Zboril, R and Adetunji, J and Nomura, K, Title = A new fast type of Mossbauer spectrometer for the rapid determination of iron-bearing minerals used in the paint industry, Journal = CZECHOSLOVAK JOURNAL OF PHYSICS, Year = 2005, Volume = 55, Number = 7, Pages = 803-811, Month = JUL, Note = International Colloquium on Mossbauer Spectroscopy in Materials Science, Vsemina, CZECH REPUBLIC, JUN 01-04, 2004, Abstract = A new miniaturised Mossbauer spectrometer has been developed for laboratory and industrial application. Equipped with a YAlO(3):Ce crystal fast scintillation detector unit and mini transducer for the energy modulation of gamma rays, the unique mechanical design enhances protection from radiation and prevents disturbance by mechanical vibrations. It can be used with various types of cryostat and furnace. Supported by the LabVIEW graphical programming environment and by the new algorithm for the quantification of iron-components, the spectrometer can be used as a single-purpose instrument for the rapid determination of the Fe(2+)/Fe(3+) ratio in ilmenite and Morin transition temperature of hematite. It can also be used to monitor the manufacturing processes for titanium white and copperas red., DOI = 10.1007/s10582-005-0082-2, ISSN = 0011-4626, Unique-ID = ISI:000231635800005,
2002
- M. Mashlan, D. Jancik, and A. Kholmetskii, “YAG : Ce and YAP : Ce – Suitable fast detectors for transmission
Mossbauer spectroscopy,” HYPERFINE INTERACTIONS, vol. 139, iss. 1-4, pp. 673-678, 2002.
[Bibtex]@article ISI:000179497300075, Author = Mashlan, M and Jancik, D and Kholmetskii, A, Title = YAG : Ce and YAP : Ce - Suitable fast detectors for transmission Mossbauer spectroscopy, Journal = HYPERFINE INTERACTIONS, Year = 2002, Volume = 139, Number = 1-4, Pages = 673-678, Note = 5th International Symposium on the Industrial Applications of the Mossbauer Effect, VIRGINIA BEACH, VIRGINIA, AUG 13-18, 2000, Organization = Condensed Matter \& Mat Phys Res Grp, Abstract = Yttrium aluminum garnet and perovskite activated by cerium are fast mechanically and chemically resistant scintillation materials. Their mechanical properties enable easy and precise machining. Both scintillation materials have a decay time shorter than 100 ns and, therefore, are suitable to use for high counting rates. The luminescence maximum of YAP:Ce and YAG:Ce are 360 and 550 nm, respectively. Their luminescence bands correspond with the sensitivity spectral range of the most widely used photomultipliers. Moreover, the semiconductor light detectors can be used with YAG:Ce scintillation crystals. Theoretical and experimental comparative analysis of characteristics for both YAP:Ce and YAG:Ce detectors and good experience over relatively long periods of using these detectors allow us to draw a conclusion regarding their unconditional advantages over other commonly used detectors for transmission Mossbauer spectroscopy. The considerable improvement in data production enhances the capabilities of Mossbauer spectroscopy as a research and analytical tool., DOI = 10.1023/A:1021251601920, ISSN = 0304-3843, Unique-ID = ISI:000179497300075, - D. Jancik and M. Mashlan, “Fast determination of Fe2+/Fe3+ ratio in ilmenite,” HYPERFINE INTERACTIONS, vol. 139, iss. 1-4, pp. 715-719, 2002.
[Bibtex]@article ISI:000179497300081, Author = Jancik, D and Mashlan, M, Title = Fast determination of Fe2+/Fe3+ ratio in ilmenite, Journal = HYPERFINE INTERACTIONS, Year = 2002, Volume = 139, Number = 1-4, Pages = 715-719, Note = 5th International Symposium on the Industrial Applications of the Mossbauer Effect, VIRGINIA BEACH, VIRGINIA, AUG 13-18, 2000, Organization = Condensed Matter \& Mat Phys Res Grp, Abstract = Ilmenite (FeTiO3) is an initial raw material in titanium white manufacture. The Fe2+/Fe3+ ratio in ilmenite is measured before the sulphate technological process is started. The possibility of fast measurements of this ratio could help to control the manufacture process. A single-purpose Mossbauer effect analyser for the fast determination of Fe2+/Fe3+ ratio in ilmenite was built. The fast algorithm based on the calculation of a Fe2+/Fe3+ ratio from heights of spectral lines allowed to reduce the time of one analysis to ten minutes., DOI = 10.1023/A:1021211920576, ISSN = 0304-3843, Unique-ID = ISI:000179497300081,
2001
- D. Jancik and M. Mashlan, “The single-purpose Mossbauer effect analyser for fast determination of
Fe2+/Fe3+ ratio in ilmenite,” CZECHOSLOVAK JOURNAL OF PHYSICS, vol. 51, iss. 7, pp. 755-761, 2001.
[Bibtex]@article ISI:000170360600014, Author = Jancik, D and Mashlan, M, Title = The single-purpose Mossbauer effect analyser for fast determination of Fe2+/Fe3+ ratio in ilmenite, Journal = CZECHOSLOVAK JOURNAL OF PHYSICS, Year = 2001, Volume = 51, Number = 7, Pages = 755-761, Month = JUL, Note = International Collognium on Mossbauer Spectroscopy in Materials Science, VELKE LOSINY, CZECH REPUBLIC, SEP 03-08, 2000, Abstract = Ilmenite (FeTiO3) is an initial raw material in titanium white manufacture. The Fe2+/Fe3+ ratio in ilmenite is measured before the start of sulfate technological process. Possibility of fast measurements of this ratio could help to control manufacturing process. The single-purpose Mossbauer effect analyzer for fast determination of Fe2+/Fe3+ ratio in ilmenite was built., DOI = 10.1023/A:1017670404259, ISSN = 0011-4626, Unique-ID = ISI:000170360600014, - A. Mulaba-Bafubiandi, H. Pollak, M. Mashlan, D. Jancik, and A. Kholmetskii, “A fast determination of Fe3+/Fe2+ ratio in industrial minerals,” MINERALS ENGINEERING, vol. 14, iss. 4, pp. 445-448, 2001.
[Bibtex]@article ISI:000167719000009, Author = Mulaba-Bafubiandi, AF and Pollak, H and Mashlan, M and Jancik, D and Kholmetskii, A, Title = A fast determination of Fe3+/Fe2+ ratio in industrial minerals, Journal = MINERALS ENGINEERING, Year = 2001, Volume = 14, Number = 4, Pages = 445-448, Month = APR, Abstract = Three-channels data collecting method for the determination of F3+/Fe2+ ratio in industrial iron-bearing minerals is proposed using Mossbauer effect spectroscopy. The method has been proved faster (less than five minutes) than the conventional collection of full Mossbauer spectra. Natural Ilmenite, Chromite and Stilpnomelane minerals can be used. The later is used to illustrate the method. (C) 2001 Elsevier Science Ltd. All rights reserved., DOI = 10.1016/S0892-6875(01)00026-7, ISSN = 0892-6875, Unique-ID = ISI:000167719000009,
1999
- M. Mashlan, D. Jancik, and A. Kholmetskii, “YAP : Ce scintillation detector for transmission Mossbauer spectroscopy,” in MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE, 1999, pp. 391-398.
[Bibtex]@inproceedings ISI:000081412500036, Author = Mashlan, M and Jancik, D and Kholmetskii, AL, Editor = Miglierini, M and Petridis, D, Title = YAP : Ce scintillation detector for transmission Mossbauer spectroscopy, Booktitle = MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE, Series = NATO ADVANCED SCIENCE INSTITUTE SERIES, SUB-SERIES 3, HIGH TECHNOLOGY, Year = 1999, Volume = 66, Pages = 391-398, Note = Conference of the NATO Advanced Research Workshop on Mossbauer Spectroscopy in Materials Science, SENEC, SLOVAKIA, SEP 06-11, 1998, Organization = NATO Sci Comm, Abstract = A YAP:Ce scintillation crystal has a decay time that is one order of magnitude shorter than that of NaI:T1, and therefore this allows its use for rather high counting rates. The optimal thickness of a YAP:Ce crystal for (57)Fe and (119)Sn Mossbauer spectroscopy is 0.35 mm. The photomultiplier tube R6095 (Hamamatsu) is used in the scintillation detector. The signal is amplified by means of a fast preamplifier constructed on the base of a NE 5539 operational amplifier. Standard pulse-height discriminators, used with the NaI:T1 scintillation detector and proportional counter, respectively, cannot be used with a YAP:Ce scintillation detector, because the duration of the pulses on the preamplifier output is less than 200 ns. A fast pulse-height discriminator was built using two fast MAC 160 comparators., ISBN = 0-7923-5640-3, Unique-ID = ISI:000081412500036, - M. Mashlan, D. Jancik, D. Zak, F. Dufka, V. Snasel, and A. Kholmetskii, “The Mossbauer spectrometer as a virtual instrument,” in MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE, 1999, pp. 399-406.
[Bibtex]@inproceedings ISI:000081412500037, Author = Mashlan, M and Jancik, D and Zak, D and Dufka, F and Snasel, V and Kholmetskii, AL, Editor = Miglierini, M and Petridis, D, Title = The Mossbauer spectrometer as a virtual instrument, Booktitle = MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE, Series = NATO ADVANCED SCIENCE INSTITUTE SERIES, SUB-SERIES 3, HIGH TECHNOLOGY, Year = 1999, Volume = 66, Pages = 399-406, Note = Conference of the NATO Advanced Research Workshop on Mossbauer Spectroscopy in Materials Science, SENEC, SLOVAKIA, SEP 06-11, 1998, Organization = NATO Sci Comm, Abstract = New programming methods have been used for building a virtual Mossbauer spectrometer. Data acquisition is realized via the PIGGY 32/154/320 microcontroller. This microcontroller is connected with a computer by RS232 interface. The software communicates with the spectrometer module and provides an intelligent graphical user interface for the control of the spectrometer and for the presentation of the measured results. Mossbauer spectra of 256, 512, 1024, 2048 channels can be accumulated in constant acceleration or constant velocity modes. Pulse height spectra can be collected in an energy window scanning mode. The velocity range is +/-100 mm/s and the nonlinearity of the velocity scale is lower than 0.1\%, the maximum input count rate is 10 MHz and the channel capacity is 2(32)-1 counts., ISBN = 0-7923-5640-3, Unique-ID = ISI:000081412500037, - M. Mashlan, D. Jancik, A. Kholmetskii, A. Mulaba, and H. Pollak, “Mossbauer spectrometer with YAlO3 : Ce scintillation crystal,” HYPERFINE INTERACTIONS, vol. 121, iss. 1-8, pp. 769-773, 1999.
[Bibtex]@article ISI:000082617800129, Author = Mashlan, M and Jancik, D and Kholmetskii, A and Mulaba, A and Pollak, H, Title = Mossbauer spectrometer with YAlO3 : Ce scintillation crystal, Journal = HYPERFINE INTERACTIONS, Year = 1999, Volume = 121, Number = 1-8, Pages = 769-773, Note = 11th International Conference on Hyperfine Interactions, DURBAN, SOUTH AFRICA, AUG 23-28, 1998, Abstract = A Mossbauer spectrometer has been developed using a mini transducer and a scintillation detector with a YAlO3:Ce crystal. Data acquisition is realised via the PIGGY 32/154/320 microcontroller. Mossbauer spectra of 2048 channels can be accumulated in the constant acceleration or constant velocity modes. Pulse height spectra can be collected in the energy window scanning mode. The shape and amplitude of the velocity signal, the energy window of the single channel analyser, and the high voltage of the scintillation detector are controlled by the microcontroller. The velocity range is +/-100 mm/s and the nonlinearity of the velocity scale is lower than 0.1\%, while the maximum input count rate is as high as 10 MHz with a channel capacity of 2(32) - 1 counts., ISSN = 0304-3843, Unique-ID = ISI:000082617800129,