具有非线性脊柱的多氨酸寡合体的负差导电性
Guowen Kuang1, Shi Zhang Chen2, Linghao Yan1
1Department of Physics, The Hong Kong University of Science and Technology , Hong Kong, China.
Journal of the American Chemical Society
|December 29, 2017
概括
我们观察到聚氨酸寡合体的负差电导率 (NDC). 观察到的NDC效应取决于分子骨干
科学领域:
- 分子电子
- 有机电子产品
- 量子运输
背景情况:
- 负差电导率 (NDC) 是电子设备的一个关键现象.
- 聚烯寡合物具有可调节的电子特性.
- 控制分子电线中的电荷传输对于纳米电子非常重要.
研究的目的:
- 研究具有非线性脊柱的多醇寡合体中的NDC效应.
- 了解分子结构对电荷传输的影响.
- 探索设计分子电子设备的潜力.
主要方法:
- 低温扫描道显微镜 (LT-STM) 用于单分子传输测量.
- 密度函数理论 (DFT) 与非平衡格林函数 (NEGF) 结合用于理论模拟.
- 在寡合电线中选择性控制电荷传输路径.
主要成果:
- 在T形结处观察到强大的NDC.
- 在90度的扭曲交叉点检测到双稳定的NDC.
- 在120度扭曲交叉点上没有NDC.
- 由偏差调节的电极-分子轨道杂交引起的脊柱依赖性NDC.
结论:
- 分子骨架结构决定了聚烯寡合物的NDC效应.
- 观察到的机制是分子系统的通用性.
- 开辟了设计分子NDC装置的新途径.
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