分子电子开关的极性和相互作用的分子工程
Penelope A Lewis1, Christina E Inman, Francisco Maya
1Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802-6300, USA.
Journal of the American Chemical Society
|December 8, 2005
概括
研究人员使用电场控制分子开关,从而实现可调节的导电. 键稳定了这些分子开关,这表明在分子基质键上倾斜驱动开关.
科学领域:
- 分子电子学分子电子学
- 超分子化学 超分子化学
- 表面科学是一门科学.
背景情况:
- 奥利戈乙烯 (OPEs) 是一个有前途的分子电线.
- 黄金表面上的自组装单层 (SAM) 能够制造分子设备.
- 控制分子切换对于分子电子学至关重要.
研究的目的:
- 调查和控制SAM中OPE的切换行为.
- 了解双极时刻和电场在分子切换中的作用.
- 探索分子导电状态的稳定机制.
主要方法:
- 在Au{111}.}上制造含有胺的乙醇SAM.
- 使用扫描道显微镜 (STM) 探测分子导电.
- 应用偏差依赖电场来诱导和控制切换.
- 修改OPE设计以改变双极时刻.
主要成果:
- 证明了OPE的偏差依赖的切换.
- 表明切换极性可以通过重新设计分子二极极矩来逆转.
- 确定了分子间结作为导电状态的稳定机制.
- 在分子-基底接口上与分子倾斜相关的导电性切换.
结论:
- 在OPE中分子切换可以通过电场与分子二极管相互作用来控制.
- 键在稳定切换导电状态方面发挥着关键作用.
- 导电性切换的拟议机制涉及由于分子倾斜而导致分子基质键的混合变化.
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