Fyzikální ústav Akademie věd ČR

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Research at Department 28

Experimental investigation of surface acoustic wave dispersion in non-ideal surfaces (roughness, films in form of islands, and various surface structures). Verification of different theoretical modelsResearch subjects

Verification of the influence of surface roughness on the phase velocity of Rayleigh waves in GaAs crystals /Thin Solid Films 491 (2005) 184/
Verification of the theoretical solution of SAW dispersion in the model surface created by Au drops on Si crystal /J Appl Phys 102 (2007) 063516/ Celý text >>

Investigation of phase transformations in micro/nanoregions beneath the nanoindentor – due to high pressure induced phase transformationsResearch subjects

Investigation of hardness and elastic modulus of the magnetron sputtered films of amorphous silicon, microcrystalline silicon and single crystal Si(111) as well.
Phase transformations in silicon are influenced not only by pressure and rate of loading, but also by original structure /Thin Solid Films 516 (2008) 5368/ Celý text >>

Investigation of nanocompression of materials with the view of verification/modelling of mechanical properties in micro-volumes of the materialResearch subjects

Nanocompresion (with the flat punch) of micropillars (Ø = 1,3 µm, height ~ 1,6 x Ø) prepared by FIB from Al-Cu films. Investigation of the σ – ε curves, evaluation of the plastic yielding, mechanical properties, etc. /J Mater. Res. 24 (2009) 1353/

Complete investigation of nanomechanical properties of microcrystals of zeolites (in form of prisms sizes ~ 40 µm x 40 µm x 240 µm) by nanoindentation /Microporous and Mesoporous Materials 94 (2006) 226/ Celý text >>

Conception and investigation of basic nanomechanical and nanotribological properties of the model protective thin layers and biomechanical implantsResearch subjects

Preparation of thin protective layers on the basis of amorphous carbon with different dopants taking effect on the intrinsis stress decrease and investigation of their mechanical and tribological properties potentially applicable like hard sliding layers, eventually biocompatible, for coating of bioprostetics /for example: Surf. Coat. Technol. 202 (2008) 1738; Int. J. Mat. Res. 99 (2008) 871; Microelectronics Journal 40 (2009) 650; Diam. Relat. Mater. 18 (2009) 27/ Celý text >>

Advanced system for monitoring of the growth of metal nanostructures on dielectric substrateResearch subjects

The aim of the project is to develop methods for monitoring of preparation of metallic nanostructures on dielectric surface in deposition systems involving combination of magnetron sputtering, pulsed laser deposition and ion beam assistance. The study provides better understanding of film growth mechanism – growth modes relating to growth conditions of metals nanostructures on dielectric materials. Celý text >>

Pulsed laser depositionResearch subjects

Group of laser depositions is concentrated on the improvement of PLD (pulsed laser deposition) technology, mainly on hybrid PLD systems (combination of PLD with magnetron sputtering, RF discharges and ion beams) and to MAPLE technology (matrix assisted pulsed laser evaporation) for synthesis of organic thin films. The attention is paid to creation of nanocrystalline and nanocomposite films and multilayers, and to superlattices. Celý text >>

List of selected resultsSelected results

development of UHV hybrid laser deposition systems for fabrication of self-assembled magnetic nanostructures and fluoride nanostructures for optics
development of a system for controlling and monitoring of vacuum parameters – purchased by Pfeiffer Vacuum
development of variable optical filters (development of a deposition system allowing control of the growth of multilayered structures by means of in-situ monitoring of optical properties)
plasma characterization of pulsed reactive magnetron sputtering of alumina oxide – precise controlling of deposit Celý text >>