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412
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Role of pressure and CO2 in linear antenna CVD on diamond growth and electronic properties
Kromka, Alexander; Babchenko, Oleg; Ižák, Tibor; Potocký, Štěpán; Rezek, Bohuslav
2012 - anglický
Linear antenna microwave plasma. Diamond CVD growth. Nanocrystals versus planar large crystals.
Klíčová slova:
nanocrystalline diamond; linear antenna CVD; SEM; Raman spectroscopy
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Role of pressure and CO2 in linear antenna CVD on diamond growth and electronic properties
Linear antenna microwave plasma. Diamond CVD growth. Nanocrystals versus planar large crystals.
Growth of diamond thin films: a review
Kromka, Alexander; Potocký, Štěpán; Rezek, Bohuslav
2012 - anglický
Diamond is shown as an extraordinary material which offers promising solution for variety of fundamental studies and industrial uses. Here, growth of synthetic diamond films at low pressures (1 atm) and low temperatures (<1000°C) from carbon consisting gas mixtures is discussed. Variety of chemical vapor deposition techniques are reviewed, their advantages and disadvantages are pointed out too.
Klíčová slova:
diamond; chemical vapor deposition; microwave plasma; raman spectroscopy
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Growth of diamond thin films: a review
Diamond is shown as an extraordinary material which offers promising solution for variety of fundamental studies and industrial uses. Here, growth of synthetic diamond films at low pressures (1 atm) ...
Magnetic properties of doped CeO.sub.2./sub. nanoparticles and CeO.sub.2./sub.-Fe.sub.2./sub.O.sub.3./sub. mixed oxides
Mantlíková, Alice; Bittová, Barbara; Burianová, Simona; Vejpravová, Jana; Nižňanský, D.; Holec, Petr
2012 - anglický
We have investigated magnetic properties of CeO2 nanoparticles and CeO2/SiO2 nanocomposites doped by various magnetic metal oxide ions (Fe, Gd, Sm, Nd). Samples were obtained by co-precipitation and sol-gel method. Particle size has been obtained as 5 - 25 nm for nanocomposite and 25 - 100 nm for nanoparticles increasing with the increase of the annealing temperature. Detailed measurements of magnetization demonstrate paramagnetic state in the majority of the doped samples with maximum magnetization decreasing with the decrease of effective magnetic moment of the dopant ions from Gd3+ to Nd3+. It has been also observed, that the high-coercivity ε-Fe2O3 forms in CeO2-Fe2O3/SiO2 nanocomposite for higher concentration of the Fe ions (Ce/Fe/Si ratio equal to 1/2/9) and for the highest annealing temperature.
Klíčová slova:
CeO.sub.2./sub.; ε-Fe.sub.2./sub.O.sub.3./sub.; mixed oxides; nanoparticles
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Magnetic properties of doped CeO.sub.2./sub. nanoparticles and CeO.sub.2./sub.-Fe.sub.2./sub.O.sub.3./sub. mixed oxides
We have investigated magnetic properties of CeO2 nanoparticles and CeO2/SiO2 nanocomposites doped by various magnetic metal oxide ions (Fe, Gd, Sm, Nd). Samples were obtained by co-precipitation and ...
Structuring of diamond films by reactive ion plasma etching
Domonkos, M.; Ižák, Tibor; Proška, J.; Kromka, Alexander
2012 - anglický
In this study, two common strategies of diamond film structuring are described. Main focus is on the comparison of top-down and the bottom-up strategies. The top-down strategy is primary related to dry reactive ion etching through masking materials (or even without mask), while bottom-up strategy is based on selective area deposition of diamond film. Several methods of both strategies are demonstrated in details in the article, regarding to their properties and basic principles.
Klíčová slova:
nanostructuring; diamond thin films; reactive ion etching; scanning electron microscopy
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Structuring of diamond films by reactive ion plasma etching
In this study, two common strategies of diamond film structuring are described. Main focus is on the comparison of top-down and the bottom-up strategies. The top-down strategy is primary related to ...
Hollow-duct radiation delivery system investigation
Fibrich, Martin; Rus, Bedřich; Kramer, Daniel
2012 - anglický
Investigation of hollow-duct structure for high-power laser-diode-array-radiation delivery into the end-pumped large-aperture gain media is reported.
Klíčová slova:
laser; diode-array-radiation; hollow-duct radiation
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Hollow-duct radiation delivery system investigation
Investigation of hollow-duct structure for high-power laser-diode-array-radiation delivery into the end-pumped large-aperture gain media is reported.
Polishing a polymer interlayers for diamond-diamond wafer bonding
Babchenko, Oleg; Verveniotis, Elisseos; Ledinský, Martin; Rezek, Bohuslav; Vallin, Ö.; Kromka, Alexander
2012 - anglický
Surfaces of as-grown samples had high local peaks (detected by white light interferometer) that impede diamond to diamond bonding as directly as by employing interlayer polymer.
Klíčová slova:
nanocrystalline diamond; linear antenna plasma; focused plasma; SEM; AFM
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Polishing a polymer interlayers for diamond-diamond wafer bonding
Surfaces of as-grown samples had high local peaks (detected by white light interferometer) that impede diamond to diamond bonding as directly as by employing interlayer polymer.
Optically and electronically active diamond-silicon photonic structures: state and outlooks
Ondič, Lukáš; Dohnalová, Kateřina; Kůsová, Kateřina; Cibulka, Ondřej; Ledinský, Martin; Babchenko, Oleg; Kromka, Alexander; Rezek, Bohuslav; Pelant, Ivan
2012 - anglický
We have prepared the photonic crystal at the top of the nanocrystalline diamond layer. We have obtained the effective extraction of diamond intrinsic photoluminescence via leaky modes. We have shown the simulation of optical gain enhancement in the photonic crystal.
Klíčová slova:
nanocrystalline diamond; photonic crystal; photoluminescence
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Optically and electronically active diamond-silicon photonic structures: state and outlooks
We have prepared the photonic crystal at the top of the nanocrystalline diamond layer. We have obtained the effective extraction of diamond intrinsic photoluminescence via leaky modes. We have shown ...
Intrinsic and boron-doped diamond microstructured for electrochemical batteries
Kromka, Alexander; Babchenko, Oleg; Rezek, Bohuslav; Ižák, Tibor; Libertínová, Jitka; Hruška, Karel; Nyholm, L.; de Oliviera Jorge, E.
2012 - anglický
Diamond - widest electrochemical window, excellentfor covalent binding of molecules, effective csarge transfer.
Klíčová slova:
nanocrystalline diamond; intrinsic diamond; boron-doped diamond; surface conductivity; SEM; AFM
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Intrinsic and boron-doped diamond microstructured for electrochemical batteries
Diamond - widest electrochemical window, excellentfor covalent binding of molecules, effective csarge transfer.
Electrochemical growth of polypyrrole on boron doped diamonds
Ukraintsev, Egor; Kromka, Alexander; Haenen, K.; Rezek, Bohuslav
2012 - anglický
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.
Klíčová slova:
hydrogen and oxygen terminated diamond; boron doped diamond; polypyrrole; AFM; KFM
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Electrochemical growth of polypyrrole on boron doped diamonds
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 ...
H-terminated diamond-capped impedance transducer: Novel molecular sensor
Stehlík, Štěpán; Ižák, Tibor; Kromka, Alexander; Dolenský, B.; Havlík, M.; Rezek, Bohuslav
2012 - anglický
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.
Klíčová slova:
hydrogen terminated diamond; diamond-capped impedance transducer; pyrrole groups
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
H-terminated diamond-capped impedance transducer: Novel molecular sensor
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 ...
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