نتایج جستجو برای: nanocrystallites oxide
تعداد نتایج: 176640 فیلتر نتایج به سال:
The results of studying the processes dielectric relaxation in thin nanocrystalline films vanadium dioxide are presented. existence a non-Debye process was revealed, which is due to presence distribution relaxators over times according Cole-Davidson model. activation energy found be Ep = (0.9 ± 0.1) eV. observed regularities explained by model views system as set whose physical parameters have ...
Nanocrystalline silicon carbide ~SiC! thin films were deposited by plasma enhanced chemical vapor deposition technique at different deposition temperatures (Td) ranging from 80 to 575 °C and different gas flow ratios ~GFRs!. While diethylsilane was used as the source for the preparation of SiC films, hydrogen, argon and helium were used as dilution gases in different concentrations. The effects...
In article number 2006819, Chien-Chih Lai and co-workers report the first demonstration of a diode-pumped ultralow-threshold continuous-wave room-temperature perovskite laser, by coating MAPbI3 nanocrystallites onto high-quality yttrium aluminum garnet (YAG) crystal fiber. The atomically smooth fiber not only serves as perfect microcavity for ultralow-loss optical resonance but also facilitates...
This paper considers the optoelectronic properties of porous nanostructured silicon obtained by electrochemical etching method. It was noted that electrolyte concentration affects depth porosity, while anodizing current density and size crystallites, as well photoluminescence spectra. The results Raman measurement showed a low-frequency shift wavenumber on 504 cm-1 line, which changes frequency...
Pseudo-icosahedral Cu microcrystals have been synthesized in a solvothermal system containing CuSO4·5H2O as the precursor, polyvinylpyrrolidone (PVP) reductant/capping agent, and dimethylformamide solvent. The structural morphological evolutions over reaction time are investigated, which enable us to establish novel formation mechanism of pseudo-icosahedral crystals Cu. first crystalline phase ...
Silicon-rich Al2O3 films (Six(Al2O3)1-x) were co-sputtered from two separate silicon and alumina targets onto a long silicon oxide substrate. The effects of different annealing treatments on the structure and light emission of the films versus x were investigated by means of spectroscopic ellipsometry, X-ray diffraction, micro-Raman scattering, and micro-photoluminescence (PL) methods. The form...
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