Polymorph-tuned Synthesis of a- and b-Bi2O3 Nanowires and Determination of Their Growth Direction from Polarized Raman Single Nanowire Microscopy

Manager 2019.03.07 13:56 Views : 518

Year 2011 
Journal Info. Chemistry - A European Journal, 17, 1304-1309 (2011). 
Author Juneho In, Ilsun Yoon, Kwanyong Seo, Jeunghee Park, Jaebum Choo, Yonghoon Lee* and Bongsoo Kim* 
etc.  

Abstract

We report polymorph-tuned synthesis of a- and b-Bi2O3 nanowires and their single nanowire micro- Raman study. The single crystalline Bi2O3 nanowires in different phases (a and b) were selectively synthesized by adjusting the heating temperature of Bi precursor in a vapor transport process. No catalyst was employed. Furthermore, at an identical precursor evaporation temperature, a- and b- phase Bi2O3  nanowires were simultaneously synthesized along the temperature gradient at a substrate. The growth direction of a-Bi2O3 nanowires was revealed by polarized Raman single nanowire spectra. For thin b-Bi2O3  nanowires with a very small diameter, the polarized Raman single nanowire spectrum was strongly influenced by the shape effect.

 

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