单斜相W(18)O(49)纳米线生长与分解的原位透射电子显微镜观察
In situ TEM observation of the growth and decomposition of monoclinic W(18)O(49) nanowires.
作者信息
Chen C L, Mori H
机构信息
Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, Ibaraki, Osaka, Japan.
出版信息
Nanotechnology. 2009 Jul 15;20(28):285604. doi: 10.1088/0957-4484/20/28/285604. Epub 2009 Jun 24.
The growth of monoclinic W(18)O(49) nanowires by heat treatment of a tungsten filament at approximately 873 K and the decomposition of these nanowires under 200 keV electron irradiation at approximately 1023 K have been investigated using in situ transmission electron microscopy (TEM). In situ TEM observation of the growth confirmed the vapor-solid growth mechanism of the monoclinic W(18)O(49) nanowires. In situ irradiation experiments revealed the formation of metallic bcc tungsten from monoclinic W(18)O(49) nanowires under 200 keV electron irradiation.
通过在约873K下对钨丝进行热处理来生长单斜晶系W(18)O(49)纳米线，并利用原位透射电子显微镜（TEM）研究了这些纳米线在约1023K下200keV电子辐照下的分解情况。原位TEM对生长过程的观察证实了单斜晶系W(18)O(49)纳米线的气-固生长机制。原位辐照实验表明，在200keV电子辐照下，单斜晶系W(18)O(49)纳米线会形成金属体心立方钨。
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