In situ formation of bismuth nanoparticles through electron-beam irradiation in a transmission electron microscope

被引：58
|
作者：
Sepulveda-Guzman, S.
Elizondo-Villarreal, N.
Torres-Castro, D. Ferrer A.
Gao, X.
Zhou, J. P.
Jose-Yacaman, M. [1 ]
机构：
[1] Univ Texas, Dept Chem Engn, Austin, TX 78712 USA
[2] Univ Texas, Texas Mat Inst, Austin, TX 78712 USA
来源：
NANOTECHNOLOGY | 2007年 / 18卷 / 33期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1088/0957-4484/18/33/335604
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, bismuth nanoparticles were synthesized when a precursor, sodium bismuthate, was exposed to an electron beam at room temperature in a transmission electron microscope (TEM). The irradiation effects were investigated in situ using selected-area electron diffraction, high-resolution transmission electron microscopy and x-ray energy dispersive spectroscopy. After the electron irradiation, bismuth nanoparticles with a rhombohedral structure and diameter of 6 nm were observed. The average particle size increased with the irradiation time. The electron-induced reduction is attributed to the desorption of oxygen ions. This method offers a one-step route to synthesize bismuth nanoparticles using electron irradiation, and the particle size can be controlled by the irradiation time.
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页数：6
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