Charge Transport in Molecular Wires and Devices

该奖项授予北卡罗来纳州大学的约翰·J·博兰教授， 查佩尔山由先进材料和加工计划支持 在化学部和电子材料计划在 材料研究部。研究的重点是电荷 分子导线和器件中的传输。收费的方法 将直接测量大分子，低聚物， 导电聚合物和导电聚合物链段将利用 双探针扫描隧道显微镜（DPSTM），一种独特的仪器 由首席研究员开发。对于那些尺寸 小于最小探针间距时， 构建在分子上。这项研究将解决哪些结构 有利于和阻碍电荷流动，其中电位下降发生在 分子及其与分子结构、能量 电荷输运过程中的分子耗散和电荷效应 在探针-分子界面处转移。 电路尺寸最小化的最终极限是开发 具有分子尺寸的器件，即，分子电子学这 调查将解决背后的基本原则， 分子中电荷的传输以及与电子性质相关的 分子结构

This award to Prof. John J. Boland at the University of North Carolina at Chapel Hill is supported by the Advanced Materials and Processing Program in the Chemistry Division and the Electronic Materials Program in the Division of Materials Research. The focus of the research is charge transport in molecular wires and devices. The methodology by which charge transport will be directly measured in large molecules, oligomers, conducting polymers and segments of conducting polymers will utilize the dual probe scanning tunneling microscope (DPSTM), a unique instrument developed by the principal investigator. For molecules whose dimensions are less that the minimum interprobe spacing, contact leads will be fabricated onto the molecules. The research will address which structures favor and which impede charge flow, where potential drops occur within molecules and their relationship to molecular structure, energy dissipation in molecules during charge transport and the effect of charge transfer at the probe-molecule interface. The ultimate limit in circuit size minimization is the development of devices with molecular dimensions, i.e., molecular electronics. This investigation will address the fundamental principles behind the transport of charge in molecules and relate electronic properties to molecular structure.