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Presents information on a study that investigated direct current resistivity and its temperature dependence for macrostructured NiAl. Types of defects in n-material; Two aspects in which the interaction of interfaces with the conduction electrons is manifested.

The mass preparation of SnO2 nanobelts and nanowires has been achieved by carrying out the reaction of SnO2 powder and graphite at 1150°C. A metallic catalyst and vacuum conditions are not necessary. The temperature of the substrates and the concentration of oxide vapour were the critical experimental parameters for the formation of different morphologies of SnO2 nanostructures. The as-synthesized SnO2 nanobelts formed in region II are single crystalline with a [101] growth axis, with widths ranging from 50 to 500 nm, width-to-thickness ratios of 5–10, and lengths up to a few millimetres. [ABSTRACT FROM AUTHOR]

Wide-bandwidth random lasing action is observed from the randomly assembled ZnS/ZnO biaxial nanobelt heterostructures under optical excitation. This is because optical gain at ultraviolet regime can be obtained from the near-band-edge radiative recombination of ZnS and ZnO. Surface defects related radiative recombination centers of ZnS and ZnO nanostructures also contribute to the visible optical gain. Hence, a broadband optical gain is obtained from the ZnS/ZnO biaxial nanobelt heterostructures. Moreover, a wide bandwidth coherent optical feedback can be achieved from the randomly assembled biaxial nanobelts due to high refractive index contrast between the nanobelts and air. [ABSTRACT FROM AUTHOR]

Carbon-encapsulated ZnSe nanoparticles with diameters about 50 nm were synthesized by noncatalytic one-step thermal evaporation method. The ZnSe cores have a wurtzite crystal structure. The as-synthesized products are uniform and composed of single-crystalline ZnSe nanoparticles enwrapped with polycrystalline graphite layers. The photoluminescence measurement of the carbon-encapsulated nanoparticles shows that the blue emission enhances dramatically compared with the naked ZnSe nanoparticles. This synthetic strategy might exploit a favorable route to synthesize carbon-encapsulated semiconductor nanostructures, which are potentially important for optoelectronic nanodevices. [ABSTRACT FROM AUTHOR]

This article focuses on a study related to direct electrodeposition of highly dense Bi/Sb superlattice nanowire arrays. Heterostructure formation in one-dimensional nanostructures is equally important for their unique physics properties and has produced much interesting research. Theoretical study indicated that superlattice nanowires are promising systems for the thermoelectric applications, because this structure is believed to be better in reducing phonon transport and keeping high electron mobility. The electrodeposition process is stopped when the wires emerge from the anodic alumina membranes surface.