• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >Exploring the work function variability and structural stability of VO_2 (1 1 0) surface upon noble metal (Ag, Au, Pt) adsorption and incorporation
【24h】

Exploring the work function variability and structural stability of VO_2 (1 1 0) surface upon noble metal (Ag, Au, Pt) adsorption and incorporation

机译：探索贵金属（Ag，Au，Pt）吸附和掺入后VO_2（1 1 0）表面的功函数变异性和结构稳定性

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

Vanadium dioxide (VO2) has attracted great attention, with scientific and technological advances over the past few decades due to its reversible metal-insulator transition at 340 K. However, the high phase transition temperature (Tc) of VO2 limits its practical applications. Our first-principles calculations show that VO2(1 1 0) surfaces with adsorbed noble metals (Ag, Au, Pt) exhibit a lower work function compared with the clean surface and further induces a lower Tc due to charge transfer from the noble metals to the VO2(1 1 0) surface. However, the work functions of the VO2(1 1 0) surfaces after the incorporation of noble metals are higher than that of the clean surface. In addition, the results of formation energies of various configurations show that the VO2(1 1 0) surface with the adsorption and incorporation of Ag is energetically more favorable than those with Au and Pt. Therefore, it may be concluded that the adsorption and incorporation of noble metals can not only tailor the work function of VO2, in turn realizing the rational tuning of Tc of VO2, but also stabilize the structures of VO2 thin films. These results provide guidance for further exploration of VO2-based optical switching devices and smart windows. (C) 2018 Elsevier B.V. All rights reserved.
机译：二氧化钒（VO2）由于其在340 K时可逆的金属-绝缘体转变而在过去几十年中获得了科学和技术的进步。但是，VO2的高相变温度（Tc）限制了其实际应用。我们的第一性原理计算表明，与清洁表面相比，吸附有贵金属（Ag，Au，Pt）的VO2（1 1 0）表面表现出较低的功函，并且由于电荷从贵金属转移到金属表面而进一步降低了Tc。 VO2（1 1 0）表面。但是，在引入贵金属之后，VO2（1 1 0）表面的功函数高于清洁表面的功函数。另外，各种构型的形成能结果表明，吸附和掺入Ag的VO2（1 1 0）表面在能量上比具有Au和Pt的那些更有利。因此，可以得出结论，贵金属的吸附和结合不仅可以调节VO2的功函数，进而实现VO2 Tc的合理调节，而且可以稳定VO2薄膜的结构。这些结果为进一步探索基于VO2的光开关设备和智能窗提供了指导。 （C）2018 Elsevier B.V.保留所有权利。

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