基于C60的子型分子中的电荷传输:在两个不同的导电状态之间机械诱导的切换
Pavel Moreno-García1, Andrea La Rosa, Viliam Kolivoška
1Department of Chemistry and Biochemistry, University of Bern , Freiestrasse 3, CH-3012 Bern, Switzerland.
Journal of the American Chemical Society
|February 5, 2015
概括
单个分子的电荷传输使用布金斯特富勒林覆盖的烯子进行了研究. 这些分子充当机械控制的开关,表现出两种不同的导电状态.
科学领域:
- 分子电子学分子电子学
- 纳米技术纳米技术
- 材料科学是一种材料科学.
背景情况:
- 研究单分子电荷传输对于开发分子电子设备至关重要.
- 巴克明斯特富勒 (C60) 和基于的化合物是分子电子学的有希望的构建模块.
研究的目的:
- 为了研究一个新的巴克明斯特富勒伦覆盖的烯基子化合物 (化合物1) 的单分子电荷传输特征.
- 探索化合物1作为机械驱动分子开关的潜力.
- 了解分子配置和导电状态之间的关系.
主要方法:
- 使用扫描道显微镜断路结 (STM-BJ),电流感应原子力显微镜断路结 (CS-AFM-BJ) 和机械控制断路结 (MCBJ) 技术.
- 在环境条件下研究分子行为.
- 进行了使用相关分子 (化合物2和3) 进行验证的对照实验.
主要成果:
- 化合物1形成高度组织的,无缺陷的表面附加层,使特定的分子定位成为可能.
- 观察到两个不同的单分子导电状态,高 (G H 1) 和低 (G L 1)).
- 导电量状态依赖于压力,使分子切换功能成为可能.
- 控制实验证实了导电性状态的分配到特定的分子配置.
结论:
- 化合物1由于其独特的导电状态,可以作为机械驱动的分子开关.
- 观察到的导电量状态归因于电子穿过buckminsterfullerene定组和完全扩展的分子.
- 该研究提供了基于富勒功能化分子的分子开关设计的见解.
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