Other research projects
Provider International Atomic Energy Agency IAEA CRP F1-RC-1158.1 2009-2013 Proposer RNDr. Miroslav Vrána, CSc., ÚJF AV ČR, v.v.i. Title Development, Characterization and Testing of Materials of Relevance to Nuclear Energy Sector Using Neutron Beams
Participation with the task: Development and optimization of high-resolution neutron scattering instruments dedicated to characterization and testing of materials of relevance to nuclear energy sector and related experiments in SANS, residual strain/stress and texture studies.Read more...
Provider Akademie věd České republiky GAAV, IAA400320901 2009-2011 Proposer Tomáš Baše, PhD., ÚACH AV ČR, v.v.i. Co-proposer Jiří Vacík, CSc., ÚJF AV ČR, v.v.i. Title Gold and silver surfaces modified with functional derivatives of boron hydrides Název Zlaté a stríbrné povrchy modifikované funkcními deriváty hydridu bóru
Gold and silver polyhedral particles with narrow size distribution and average diameter ranging from micrometer to nanometer dimensions will be prepared and securely deposited on titanium containing substrates (Ti or its alloys). The particles assembled into a consistent film with controlled roughness and morphology will be modified with selected thiol derivatives of boron hydrides. These substrate surfaces will be additionally treated with cell adhesion-mediating peptide-based ligands for cell adhesion receptors in order to promote and control the adhesion, growth and differentiation of osteogenic and vascular cells in cultures on the developed layers. Gold or silver nanoparticles will be tested in combination with fullerenes C60, i.e. carbon allotrope which proved to be a good substrate for the adhesion and growth of bone and vascular cells in our earlier studies. Potential cytotoxicity of silver containing layers in correlation with their antimicrobial properties will be tested.Read more...
Provider International Atomic Energy Agency IAEA CRP F1.20.21 2007-2011 Proposer RNDr. Pavol Mikula, DrSc., ÚJF AV ČR, v.v.i. Title Improved production and utilization of short pulsed, cold neutrons at low-medium energy spallation neutron sources
Participation on multilateral project with the task: Development and optimization of a curved wide wavelength band monochromator based on strongly cylindrically bent perfect Si-slabs in a sandwich for microfocusing small-angle neutron scattering (mfSANS) device.Read more...
Provider Akademie věd České republiky KAN400480701 2007-2011 Proposer Jiří Vacík, CSc., ÚJF AV ČR, v.v.i. Title Nanostructures based on carbon and polymers for application in bioelectronic and medicine. Název Nanostruktury na bázi uhlíku a polymeru pro využití v bioelektronice a v medicíně.
The main goal of the project is synthesis and characterization of promising nanostructured composites (mainly of carbon allotropes and synthetic polymers) exhibiting important biological and other (electrical, optical) properties that would be possible to utilize in the interaction with biological systems. The synthesized composite materials (based on fullerenes and metals, carbon and polymers, modified nanocrystalline diamonds, carborans, etched ion tracks and ion implantation or irradiation) will be inspected from the viewpoint of biocompatibility, adhesion and growth of cells and other bioapplications. Another goal of the project is demonstration of the active hybrid system based on combination of a cell (biomolecule) and microelectronic device with a modified nanocrystalline diamond as an interface.Read more...
Provider Akademie věd České republiky KJB 100480601 2006-2008 Proposer RNDr. Anna Macková Ph.D., UJF AV ČR, v.v.i. Title Ion beam analysis study of crystalline structures Název Využití iontových svazků při studiu krystalických struktur
Main aim of the project is the characterization of the structures based on LiTaO3, single crystal SrTiO3, BaTiO3 and KTaO3 doped Pb, Mg materials using ion beam analysis. Crystalline structures investigated in this research are very promising for the preparation of planar lasers or are applicable in microelectronics - high permittivity materials. The dopant depth profiles, stoichiometry of crystalline structures will be measured by RBS, ERDA and PIXE.The positions of the interstitial dopants in doped crystals and the crystal modification under the used deposition technologies can be determined by the innovative analytical technique (RBS-channeling) and the crystal lattice changes will be studied by comparative method XRD in collaboration with Forschungzentrum Rossendorf. The important part will be the study of superlattice structures and their interfaces using RBS-channeling. The results of the above mentioned analyses will be confronted with properties of the prepared structures.Read more...
Provider Akademie věd České republiky M10048090 2009-2011 Proposer RNDr. Pavol Mikula, DrSc., ÚJF AV ČR, v.v.i. Title Braggova difrakční optika pro difraktometrii termálních neutronů s vysokým a ultravysokým rozlišením
Program interní podpory projektů mezinárodní spolupráce AV ČR (spolupráce ÚJF AV ČR, v.v.i. a KAERI Daejeon)
In the last decades many papers have been published in which successful employment of curved perfect Si crystals as neutron monochromators or analyzers in particular diffraction experiments has been reported. It has been found that due to the spatial condensation of neutrons (because of asymmetric diffraction geometry or focusing in real space), one may obtain a high monochromatic-beam density comparable to that of the mosaic monochromators. Taking into account reflectivity and the resolution properties of curved crystals Popovici et. al. (Missouri University) demonstrated a feasibility of the optimized curved crystal three axis spectrometer having the properties generally better than those of spectrometers employing flat mosaic crystals. New interest in the reflectivity and focusing properties of curved perfect crystals has been evoked also by successful testing of the bent perfect crystals employed in double-monochromator systems, or for medium-resolution small-angle scattering diffractometers. Favourable properties of bent Si crystals for short wavelength monochromatization have been reported and very efficient original double and triple axis arrangements employing the bent perfect crystals have been proposed and then tested for residual stress measurements of polycrystalline materials. In the last decade the neutron diffraction group of NPI ASCR, v.v.i. has been concentrated on the development of new unconventional types of neutron monochromators permitting significantly to increase figure of merit of some dedicated neutron scattering instruments. In this way a cooperation with colleagues from HANARO Centre in KAERI has appeared very fruitful.Read more...