High-crystallinity 0D, 1D and 2D Bi2Te3 nanocrystals have been synthesized using the pyrolysis of organometallic compound method. The growth process of Bi2Te3 nanocrystals was revealed by transmission electron microscopy (TEM) images. Samples synthesized at the temperature of 35°C show a dominant morphology of 0D nanoparticle or 1D nanorod, while samples synthesized at the temperature above 75°C show a dominant morphology of 2D nanoplate. Phonon vibrational behavior was investigated by Raman spectroscopy. 2D nanoplates show similar Raman features to few-quintuple thick Bi2Te3 layers, while 0D and 1D nanostructures show a blueshifted A1g2 mode and a much stronger A1u mode. This is the report about Raman spectra obtained on small Bi2Te3 nanoparticle and nanorod whose size is within the strong quantum confinement region.
- Heat Transfer Division
Size Dependent Raman Spectra of Bismuth Telluride Nanocrystals Synthesized via a One-Step Wet Chemistry Method
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Chen, L, Zhao, Q, & Ruan, X. "Size Dependent Raman Spectra of Bismuth Telluride Nanocrystals Synthesized via a One-Step Wet Chemistry Method." Proceedings of the ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Volume 1: Heat Transfer in Energy Systems; Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat and Mass Transfer in Biotechnology; Environmental Heat Transfer; Visualization of Heat Transfer; Education and Future Directions in Heat Transfer. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 441-445. ASME. https://doi.org/10.1115/HT2012-58568
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