No abstract

No abstract

No abstract

Synthesis. -Nanoparticles of the title compound with average sizes of 15-20 nm and nanowires with a diameter less than 100 nm and a length of about 10 µm are synthesized solvothermally at 150°C from BiCl3 and Te powder using NaBH4 as reductant in various solvents such as en, DMF, Py, acetone, EtOH, and H2O. The samples are characterized by XRD and TEM. The phase distributions, microstructures, and grain sizes of the nanostructured Bi 2 Te 3 products are related to the dielectric constant and surface tension of the solvent used in the solvothermal synthesis. -(ZHAO*, X. B.; JI, X. H.; ZHANG, Y. H.; LU, B. H.; J.

[Abstract] Bi2Te 3 nanoparticles of 15∼25nm were prepared via solvothermal processes in which pyridine, absolute ethanol and distilled water were used as reaction medium respectively. The XRD and TEM have been applied to analyze the samples, and the grain sizes have also been calculated by Scherrer Equation. The results showed that in these experiments, all of the reaction products' purity, crystallization, grain size and tropism increased with dielectric constant and polarity of the solvent. A novel Bi2Te3 nanowires with several tens to a hundred nanometers diameter and up to more than ten microns length have been prepared when distilled water was used as reaction medium.