نتایج جستجو برای: wurtzite
تعداد نتایج: 1679 فیلتر نتایج به سال:
Hexagonal wurtzite ZnS nanowires radially arrayed on cubic zinc-blende ZnS hollow spheres have been successfully achieved for the first time, and such novel heterogeneous ZnS hollow urchin-like hierarchical nanostructures show greatly enhanced photocatalytic properties due to their two-phase enhanced light-harvesting and high surface-to-volume ratio.
A planar force-constant model is developed for longitudinal phonons of wurtzite GaN and AlN propagating along the [0001] direction. The proposed model is then applied to the study of the phonon modes in hexagonal (0001)GaN/AlN supperlattices in longitudinal polarization. The confinement of the superlattice phonon modes is discussed. PACS numbers: 68.20.Dj, 68.35.Ja Typeset using REVTEX
A novel synthesis method for the preparation of Cu2ZnSnS4 nanocrystals is presented using a liquid precursor of tin, namely tin(II) 2-ethylhexanoate, which yields small and nearly monodisperse NCs either in the kesterite or in the wurtzite phase depending on the sulfur source (elemental sulfur in oleylamine vs. dodecanethiol).
The apparent activation energy of a nanostructure is difficult to directly measure experimentally. In this letter, we present computational method for estimating the range semiconductor nanostructures. This allows be obtained from experimentally measured average time or propagation speed at various temperatures phase boundary associated with transformation. approach entails analyzing mobility t...
nanocrystals of zno were prepared by microwave irradiation using zn (ii) acetate and triethanol amin (tea) as the starting materials and water as solvent. the nanocrystals of zno with hexagonal (wurtzite) structure were characterized by x-ray powder diffraction (xrd), transmission electron microscopy (tem), scanning electron microscopy (sem), uv-vis absorption and ftir spectroscopy techniques.
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