控制和观察单个分子连接中的利谷量子干扰效应
Bing Huang1, Xu Liu2, Ying Yuan3
1Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University , Jinhua 321004 , China.
Journal of the American Chemical Society
|November 30, 2018
概括
研究人员使用电极电位控制单个分子连接中的量子干扰 (QI). 这一突破使得分子电子和开关可以调节电导,而不会改变分子氧化还原状态.
科学领域:
- 分子电子
- 量子干扰现象
- 纳米科学
背景情况:
- 量子干扰 (QI) 对分子电子非常重要.
- 在单个分子连接中控制智商是具有挑战性的, 但是可取的.
- 现有的方法通常涉及改变分子结构或氧化还原状态.
研究的目的:
- 通过使用电极电位,研究基于甲的分子 (meta-BT) 的QI控制.
- 为了证明单个分子连接的可调导性.
- 探索创建有效分子开关的潜力.
主要方法:
- 使用meta-BT作为分子和dihydrobenzo[b]thiophene作为基组的单个分子连接的制造和表征.
- 通过操纵电解质中的电极电位进行电化学封锁.
- 在一系列电极电位的导电量测量.
- 传动功能和工作功能的理论计算.
主要成果:
- 通过改变电极电位来证明对元BT分子连接的QI效应的控制.
- 在没有改变分子的氧化还原状态的情况下,观察到两级以上的导电率变化 (<10^-6.0到10^-3.3 G0).
- 获得的电导度值高于para-BT,归因于能量水平调整的变化.
- 理论计算显示与实验结果的良好一致, 证实了破坏性QI.
结论:
- 电极电位可以有效调整分子连接中的QI效应.
- 这种电化学关门方法为开发分子开关提供了途径.
- 这些发现为控制无氧化还原状态的分子导电性提供了一种新的方法.
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