Nanotechnologie česká verze
Vydáno dne 06. 11. 2008 (1980 přečtení)

Projects solved in the area of nanotechnologies

GP102/07/P507 �Optic fibres having the nanostructured core for optical amplification�, 1/2007-12/2009, the head researcher is Ing. Ond�ej Podrazk�, PhD., Institute of Photonics and Electronics of AS CR, v.v.i. Praha, the total costs of CZK 1.492 million, thereof CZK 1.492 million from the state budget. (Year 2008 � 0.499/0.499, 2c)
Objective of the project: The research of methodological preparation bases for optical silicon fibres with cores containing nanocrystals of aluminium oxide with rare-earth elements which could strengthen the fluorescence. There will be two routes taken for the achievement of the proposed basic objective - the doping of fibre cores with aluminium oxide nanoparticles with rare-earth elements and the preparation of fibres doped with these elements and a nanocrystalline core, thanks to the thermal processing. The results should be, in addition to the methodological preparation bases for nanostructured silicon fibres, also samples of fibres doped with erbium and thulium, where the strengthened ASE could be expected. This could consequently result in the higher efficiency of fibre amplifiers and lasers working in C-, L-, and S- telecommunication bands.

GP104/06/P301 �Multilevel modelling of reactions and transport in structured porous catalytic agents�, 1/2006-12/2008, the researcher is Ing. Petr Ko��, PhD., Institute of Chemical Technology Praha, FCHT, the total costs of CZK 0.975 million, thereof CZK 0.975 million from the state budget. (Year 2008 � 0.325/0.325, 5b)
Objective of the project: The development and utilisation of methods for modelling of reactions and transfers of matter in porous structures of heterogenous catalysts. The attention will be paid especially to catalysts for the conversion of exhaust gases, while the general use of the developed processes would be maintained. The project�s objective is the development of a methodology that should allow the description, forecasting and optimising of the general effectiveness of catalysers dependent on properties of the porous structure at the level of micro and nano metres. The base for the proposed approach will be as follows:
1) The computer-assisted reconstruction of the catalyser�s porous structure;
2) The modelling of diffusion and reaction in a reconstructed porous catalyser, the microkinetics taking into the account the impact of the catalytic centre kind and the particle carriage; 3) The execution of simulations for different scales, the resultsďż˝ combinations, the comparison with experimental results and the more simple model of the catalyser unit.

GP106/06/P189 �Adaptation of properties of carbonous nanotube based polymer nanocomposites from the temperature stability point of view�, 1/2006/12/2008, the head researcher is Ing. Petr Slobodian, PhD., Tom� Ba�a University in Zl�n, Faculty of Technology, the total costs of CZK 0.681 million, thereof CZK 0.691 million from the state budget. (Year 2008 � 0.227/0.227, 1g)THUMBS UP Objective of the project: In solid amorphous substances, existing below the temperature of the glassy transformation, we see the phenomenon of consolidation of their structural arrangement which is usually called the structural relaxation. Individual relaxing units tend to get closer to the thermodynamically equilibrium state during this process. This results in a time change of many macroscopic material properties. The preparation of composite materials based on an amorphous polymer/filler creates a heterogenous system of different properties of the polymer matrix at the phase interface. There is an immobilised polymer layer of modified physical properties and different kinetics of the structural relaxation created. When there are nanoparticles used, the filler surface dramatically grows and the same happens to the volume of this immobilised layer. A good example is the amorphous polymer-based nanocomposite and carbon nanotubes. In this system, the changed relaxation ability of the polymer material directly relates to the structure of the prepared nanocomposite.

GP106/07/P044 �Transport and absorption of sound in nanofibres assemblies�, 1/2007-12/2009, the head researcher is Ing. Kl�ra Kalinov�, PhD., Technical University in Liberec, Faculty of Textiles, the total costs of CZK 0.332 million, thereof CZK 0.332 million from the state budget. (Year 2008 � 0.113/0.113, 1a)
Objective of the project: The research of mechanisms spreading and absorbing acoustic waves in nanofibre layers and nanofibre composites of the diameters 10 - 100 nanometres. The nanofibre structures are characterised by extremely large measurable surface thanks to which the researched properties reach extreme values. They cannot be derived by extrapolation using the size of the structural units. The researcher�s workplace developed the laboratory equipment preparing nanofibres and allowing the research of their creation mechanism. The project supplements the research of transport phenomena in nanofibre layers done at the workplace of the proposing party. It could be expected that nanofibres will present a completely new phenomenon in the material engineering.

GP202/07/P486 �In-depth profiling of 2D nanostructures by the SIMS, TOF-LEIS and XPS methods with the assistance of low-energy ion separation�, 1/2007-12/2009, the researcher is Ing. Petr B�bor, PhD., the total costs of CZK 1.133 million, thereof CZK 1.133 million from the state budget. (Year 2008 � 0.378/0.378, 6b)
Objective of the project: The project focuses on the study of (ultra) thin layers/multilayers (2D nanostructures) prepared by the ion and molecular bundle technologies and on the application and improvement of methods for the in situ deep analysis of these structures by the SIMS, TOF-LEIS, and XPS methods. The in-depth analysis done by these methods will use the low energy (200 - 1500 eV) ion dusting off. There are especially magnetic (ultra) thin layers and multilayers (Co/CoN, Ni/NiN, Co/Al2O3, ...), ultra thin Ga and GaN and the �high-k� dielectric ultra thin layers (ZrO2, HfO2, ...) studied. These layers are prepared within the research plan of the workplace of the proposing party. The information gained by the in-depth profiling should extend the feedback during optimising of the depositing process and that should result in better required properties of the created 2D nanostructures. The study motivation is the detailed learning and understanding of GMR phenomena, TMR and the �high-k� properties of the dielectric ultra thin layers.

GP202/07/P523 �Plasma enhanced chemical vapour deposition (PECVD) of carbon nanotubes�, 1/2007-12/2009, the head researcher is Mgr. Marek Eli�, PhD., Masaryk University in Brno, Faculty of Science, the total costs of CZK 1.081 million, thereof CZK 1.081 million from the state budget. (Year 2008 � 0.352/0.352, 1c)
Objective of the project: Within the project, there are carbon nanotubes (CNT) prepared as well as nanofibres (CNF) with the PECVD method. The synthesis is executed in the capacity or inductive high frequency glow discharge. The unique preparation method in the atmospheric microwave plasma heater is studied at the same time. The depositing process is studied with the assistance of optical emission and mass spectroscopy. Discharges are characterised by the electrical measuring. The research focuses also on the study of the growth phase CNT and CNF, including the preparation of catalytic metal layers. These layers are deposited with the assistance of the magnetron sputtering and vacuum evaporation. The prepared samples are characterised with the assistance of TEM and SEM, AFM and STM, the Raman spectroscopy, XPS, XRD, and the non traditional MALDI method. The project will also focus on the study of possible CNT and CNF applications, especially on the creation of the nanacomposite materials, which are interested because of their mechanical properties and the electromagnetic shielding. There will be the emission properties, the preparation of sensors, and the fitting of CNT on AFM tips studied.

GP202/08/P038 �Study of behaviour of the hybrid depositing process and of its utilisation in the preparation of thin layers�, 1/2008-12/2010, the researcher is Mgr. Petr Va�ina, PhD., Masaryk University in Brno, Faculty of Science, the total costs of CZK 1.125 million, thereof CZK 1.125 million from the state budget. (Year 2008 � 0.400/0.400, 7c)
Objective of the project: The study of the behaviour of the hybrid PVD-PECVD process, which will be utilised for the preparation of nanocomposite n-Ti:C/a-C:H and a-BCN:H materials. Some of the gaseous hydrocarbons, delivered directly to the depositing reactor, which would completely replace the traditional sputtering of the carbon target, will be used as the carbon source for the preparation of thin layers. The hysteretic behaviour of this depositing process and properties of prepared layers will be compared with the PVD process. There will be a comparative study for different hydrocarbon kinds prepared. The existing model of the reactive magnetron dusting should be improved by the executed experiments. This model will work with an unbalanced density shape of the discharge current and it will be extended with the interaction of the gaseous hydrocarbon with the surface of a magnetron cathode and depositing reaction walls.

GP203/06/P226 �Strengthening of the photoelectric conversion in polymer composites with metallic and semiconducting nanoparticles�, 1/2006-12/2008, the researcher is Mgr. Kl�ra Podh�jeck�, PhD, Institute of Macromolecular Chemistry of AS CR, v.v.i., Praha, the total costs of CZK 1.130 million, thereof CZK 1.130 million from the state budget. (Year 200 � 0.373/0.373, 1g)
Objective of the project: Mostly the experimental studies which should verify the possibility of strengthening the effectiveness of polymer and nanocomposite solar cells by the effects of resonance impacts of the impinging light with the surface plasmon on metallic nanoparticles mixed into the photoelectrically active layers and the attempt to explain the mechanism of these phenomena. The following possibilities of the strengthening effects will be studied: (i) The increased optical absorption of the photoelectric active part within the wide spectral area caused by the resonance of the impinging light with the surface plasmon of the metallic nanoparticle; (ii) The reduction of the probability of radiation interfaces caused by the interaction of the surface plasmon with the excited states of chromophore which could result in the strengthening of the complementary process of generation of free charges; (iii) The increased probability of the charge transfer between the donor and the acceptor in two-component organic polymer mixtures, or composites containing a low-molecular organic or inorganic component.

GP203/08/P598 �Electrochemical tools for the detection of mutations and polymorphisms in DNA�, 1/2008-12/2010, the researcher is Mgr. Pavel Koste�ka, PhD., Institute of Biophysics of AS CR, v.v.i., Brno, the total costs of CZK 1.404 million, thereof CZK 1.404 million from the state budget. (Year 2008 � 0.468/0.468, 3e)
Objective of the project: The project will extend the previous research of the electrochemical tools detecting the DNA hybridisation. There will be oligonucleotides modified by varied electrochemically active markers (especially based on metal nanocomplexes), their electrochemical behaviour will be analysed and utilised as signal probes during the DNA hybridisation. Works will also focus on the utilisation of Os, L complexes as chemical probes for wrongly paired and non paired bases in the DNA hetero duplexes. There will be the detection method for mutations in DNA designed on this principle. There will be also conditions optimised for the handling of duplexes, containing wrong pairs and abasic places, and conditions on the electrochemical or immunochemical detection of modified bases. During the detection, there will be the so-called two-surface strategy utilised, when the DNA hybridisation process takes place on an independent surface - on paramagnetic beads. This arrangement allows for the precise �tuning up� of conditions for the hybridisation and for the detection.

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