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	Review of nanocrystalline diamond film deposition on silicon and glass substrates down to 400 °C Potocký, Štěpán ; Babchenko, Oleg ; Ižák, Tibor ; Varga, Marián ; Kromka, Alexander ; Rezek, Bohuslav ; Michalka, M. We present an overview of a nanocrystalline diamond (NCD) films deposition on silicon and glass substrates by microwave plasma CVD in hydrogen-based gas mixture. The temperature plays a crucial parameter as the diamond growth process is temperature controlled. Use of temperature sensitive substrates demanded reducing substrate temperature. Natural decrease of deposition rate resulted in search of new or nonstandard process parameters which could at least minimize or compensate it. Addition of oxygen containing gasses was found to improve film quality, and increasing deposition speed. Moreover improvement in pre-treatment of foreign substrates allowed deposition of fully closed films in less then 100 nm. Low thickness of NCD always favorable due to lattice mismatch between substrate material and NCD film. Successful adoption of NCD film deposition on silicon and glass allowed us to study surface chemical modification for protein attachment and DNA immobilization. Detailed record
	H-terminated diamond-capped impedance transducer: Novel molecular sensor Stehlík, Štěpán ; Ižák, Tibor ; Kromka, Alexander ; Dolenský, B. ; Havlík, M. ; Rezek, Bohuslav Sensitivity of an intrinsic nano-crystalline diamond (NCD) layer to naphthalene Trogers base derivative decorated with pyrrole groups(TBPyr) was characterized by impedance spectroscopy. The transducer was made of Au interdigitated electrodes (IDE) with 50um spacing on alumina substrate which were capped with the NCD layer. Detailed record
	Electrochemical growth of polypyrrole on boron doped diamonds Ukraintsev, Egor ; Kromka, Alexander ; Haenen, K. ; Rezek, Bohuslav To find out the mechanism of the electrochemical attachment of polypyrrole (Ppy) to diamond we grow Ppy layers on hydrogen and oxygen terminated boron doped diamond surfaces (BDD) using constant current applied between the BDD and the platinum wire. Detailed record
	Synthesis, structure, and opto-electronic properties of organic dies on diamond Rezek, Bohuslav ; Čermák, Jan ; Ukraintsev, Egor ; Hubík, Pavel ; Mareš, Jiří J. ; Ledinský, Martin ; Fejfar, Antonín ; Kočka, Jan ; Kromka, Alexander We prepare a thin-film heterojunction of polypyrrole (Ppy) on hydrogen-terminated diamond by electro-polymerization from solution. We combine advanced scanning techniques (AFM, KFM, micro-Raman) to characterize microscopic structural, chemical, and opto-electronic properties of such system. Detailed record
	Renewal of three-dimensional nanocrystalline diamond bio-transistor by low temperature hydrogenation Krátká, Marie ; Neykova, Neda ; Ukraintsev, Egor ; Kromka, Alexander ; Rezek, Bohuslav We employ directly grown microscopic (20um and 5um) solution-gated field-effect transistors (SGFET) as a biosensor with H-terminated surface acting as a gate insulator towards solution and generator of surface conductivity at the same time. Detailed record
	Electronic transport in intrinsic H-terminated nanocrystaline diamond with various grain size Hubík, Pavel ; Mareš, Jiří J. ; Kozak, Halyna ; Kromka, Alexander ; Rezek, Bohuslav ; Krištofik, Jozef ; Kindl, Dobroslav Both effective conductivity and Hall mobility of H-NCD were found to strongly decrease with the diminishing grain size. Effective Hall concentrations (to 1017 m-2) correspond to the true hole concentrations on the surface of the grain interiors. The effective Hall mobility is a robust parameter with respect to the surface conditions. Detailed record
	Influence of nucleation and methane concentration on buckypapers exposed to hot filament chemical vapor deposition process Varga, Marián ; Kotlár, M. ; Vretenár, V. ; Ižák, Tibor ; Šoltýs, J. ; Kromka, Alexander ; Veselý, M. In this article we investigate the nanocomposite material formation, particularly the deposition of nanocrystalline diamond film on buckypaper (BP) substrate. The buckypapers were prepared from single-wall carbon nanotubes (SWCNT) mixture produced by laser ablation method. We have investigated the influence of the nucleation and methane concentration on buckypapers exposed to the hot filament chemical vapor deposition process. Detailed record
	Diamond chemical vapor deposition Kromka, Alexander Present paper reviews growth of diamond thin films by various chemical vapor deposition processes. Basic characteristics and common features of processes are pointed out with a respect to quality of grown films and standard process parameters. Novel and non-standard diamond syntheses techniques are briefly discussed. Detailed record
	Influence of methane concentration on diamond film morphology and growth rate Ižák, Tibor ; Babchenko, Oleg ; Kromka, Alexander ; Potměšil, Jiří ; Hruška, Karel In this study we investigated the influence of methane concentration on the diamond film growth. The experiments were carried out in focused microwave chemical vapour deposition system. The methane concentration was varied from 0.5% to 10 % of CH4 in H2 atmosphere. The final film morphology, chemical composition and growth rate were investigated by scanning electron microscopy (SEM), Raman spectroscopy and optical reflectance measurement. We observed, that increasing of CH4 concentration enhances the growth rate, but at the expense of the diamond film quality. Detailed record
	Influence of CO.sub.2./sub. concentration on diamond film morphology in pulsed linear antenna microwave plasma CVD system Domonkos, M. ; Ižák, Tibor ; Babchenko, Oleg ; Kromka, Alexander ; Hruška, Karel The diamond films were deposited in a pulsed linear antenna microwave plasma system. The influence of CO2 addition into the standard CH4/H2 gas mixture on the diamond film morphology was investigated. The concentration of CO2 varied from 0% up to 80% in CO2/CH4/H2 gas mixture. The film morphology, the growth rate and the ratio of sp3/sp2 carbon bonds were investigated. It was found that increasing of CO2 concentration resulted in enhanced growth rate (from 20 up to 36 nm/h). However, at very high CO2 concentrations (>40%) dominates etching instead of growth process. Moreover, we found that increasing of CO2 enhances the diamond film quality. Detailed record

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