• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Science and Technology of Advanced Materials >Electron-irradiation-induced sputtering of gold atoms from isolated nanometer-sized particles of Al_2Au
【24h】

Electron-irradiation-induced sputtering of gold atoms from isolated nanometer-sized particles of Al_2Au

机译：电子辐照从孤立的纳米级Al_2Au颗粒中金原子的溅射

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Electron irradiaion effect on nanometer-sized Al_2Au particles has been studied using transmission electron microscopy. Particles of Al_2Au in sizes of around 25 nm in diameter have been irradiated with 200 keV electrons at room temperature. In bright field images, no appreciable changes in the size and in the microstructure of Al_2Au particles have been detected. However, careful analyses of the chemical concentration by the quantitative measurement of intensities of Debye-Scherrer rings using imaging plates show that gold atoms in Al_2Au particles were selectively removed by 200 keV electron irradiation. In separate annealing experiments, on the other hand, it is observed that aluminum atoms in Al_2Au compound particles were preferentially evaporated with increasing temperature. Based upon these results, it is concluded that the selective removal of gold atoms in nanometer-sized Al_2Au particles was induced not by heat-induced-evaporation of gold atoms but by knock-on displacement during 200 keV electron irradiation. It is suggested that the threshold energy for gold atom sputtering from Al_2Au nanoparticles is as low as less than 1.9 eV.
机译：利用透射电子显微镜研究了电子辐照对纳米Al_2Au粒子的影响。在室温下用200 keV电子辐照直径约为25 nm的Al_2Au颗粒。在明场图像中，未检测到Al_2Au颗粒的尺寸和微观结构有明显变化。但是，通过使用成像板定量测量Debye-Scherrer环的强度对化学浓度进行的仔细分析表明，通过200 keV电子辐照有选择地去除了Al_2Au颗粒中的金原子。另一方面，在单独的退火实验中，观察到Al_2Au化合物颗粒中的铝原子随着温度的升高而优先蒸发。基于这些结果，可以得出结论，在纳米尺寸的Al_2Au颗粒中选择性去除金原子不是由热诱导的金原子蒸发引起的，而是由200 keV电子辐照期间的敲除位移引起的。建议从Al_2Au纳米粒子溅射金原子的阈值能量低至小于1.9 eV。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号