CAREER: CAS: A Building Block Approach to Study Charge Transport: From Single-Molecule to Bulk

职业：CAS：研究电荷传输的构建方法：从单分子到整体

• 批准号: 2239614
• 负责人: Michael Inkpen
• 金额: $ 66.86万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-07-01 至 2028-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2239614&HistoricalAwards=false
• 关键词: CAREER; CAS; Building; Block; Approach; CAREER; CAS; Building; Block; Approach

With this CAREER project, supported by the Chemical Structure, Dynamics & Mechanisms B Program of the Chemistry Division, Michael Inkpen of the Department of Chemistry at the University of Southern California (USC) seeks to develop integrated methods that explore how electrical charges move through materials across different length scales (from single-molecule to bulk). The proposed approach draws inspiration from the chemical building blocks and linkages used to build conducting and permanently porous ordered polymers (OPs). The key goals of this project are to provide a deeper fundamental understanding of how the atomic details of these molecular structures influence their electronic function(s), and to evaluate possible correlations between charge transport through chemically comparable single-molecule and bulk materials. This research ultimately aims to expose new design principles for molecular-scale devices, such as wires and switches, that approach the limit of miniaturization for electronic circuits used in computation and data storage. The goal is to identify the most promising molecular building blocks for constructing functional OPs with potential applications in energy storage, energy conversion, or sensing. Concurrently, Dr. Inkpen and his research team will leverage development of a new academic search database to engage underrepresented 1st and 2nd year undergraduate students, by improving the teaching of molecular nanoscience at USC and beyond, and by implementing a virtual, asynchronous summer workshop to reach students who cannot easily attend in person outreach activities.The fields of molecular electronics and conducting ordered polymers (OPs) each are directed at the understanding and manipulation of charge transport through molecularly well-defined systems, yet efforts in these research domains are rarely coordinated. Bridging these research areas, this proposal aims to explore fundamental structure-electronic property relationships across different length scales by studying model single-molecule, extended oligomeric, and bulk materials using a combination of scanning tunneling microscope-based break junction (STM-BJ), conducting-probe atomic force microscopy (CP-AFM), and 4-point probe methods. Quantum interference (QI), d-π conjugation, and redox effects will be probed in new families of molecular devices inspired by the multi-topic and metal-containing structures used in two-dimensional and three-dimensional OPs. Possible trends between single molecule conductance and band transport in structurally analogous bulk materials will be evaluated as a means to select specific building blocks for the construction of extended ordered systems with targeted electronic properties. New synthetic strategies will be developed that target the construction of compositionally distinct OPs with comparable crystallinity and defect concentrations. Studies of such model extended materials, on surfaces and in bulk, have the potential to improve structure-property comparisons and to allow practitioners to build new nanoscale-to-bulk transport property correlations.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在这个职业项目的支持下，在南加州大学化学部的化学结构，动力学和机制B计划B计划的支持下，南加州大学（USC）的迈克尔·英彭（Michael Inkpen）试图开发综合方法，以探索电荷如何在不同长度尺度上通过材料（从单分子到散装）进行材料。所提出的方法从化学构建块和用于建立指导和永久订购聚合物（OPS）的连接中汲取灵感。该项目的主要目标是对这些分子结构的原子细节如何影响其电子功能，并评估通过化学上可比的单物分子和大量材料之间的可能相关性，提供更深入的理解。这项研究最终旨在揭露分子规模设备（例如电线和开关）的新设计原理，以接近计算和数据存储中使用的电子电路的微型化极限。目的是确定最有希望的分子构建块，用于在能量存储，能量转换或灵敏度中使用潜在应用来构建功能OP。同时，Inkpen博士和他的研究团队将通过改善USC及其他地区的分子纳米科学教学，并通过改善虚拟的，异常的夏季夏季派遣者，以在井期的阶段和人访问中，通过改善分子范围的学生（不轻松地参加人物的分子）（分子），通过改善分子纳米科学的教学，从而使新的学术搜索数据库的开发与代表性不足的一年级和第二年的本科生相关。专门针对通过分子定义明确的系统理解和操纵电荷传输，但是在这些研究领域中的努力很少得到协调。桥接这些研究领域，该建议旨在通过研究基于扫描隧道显微镜显微镜的Brakintion（STM-BJ）的组合，通过研究模型的单分子，扩展的寡聚和大量材料来探索不同长度范围内的基本结构 - 电子性质关系（STM-BJ），导电性原子力原子力学显微镜（CP-Fafm）和4点。量子干扰（QI），D-π结合和氧化还原效应将在新的分子设备家族中探测，灵感来自于二维和三维OPS中使用的多主题和金属含量结构。单分子电导与结构类似体积材料中的带传输之间的可能趋势将作为选择特定的构建块，以构建具有靶向电子性能的扩展有序系统。将开发出新的合成策略，以构建具有可比的结晶度和缺陷浓度的构图不同的OP。对这种模型扩展材料的研究，在表面和批量上，有可能改善结构特质的比较，并允许从业人员建立新的纳米级传输交通运输物业相关性。这项奖项反映了NSF的法定任务，并通过使用该基金会的知识分子和更广泛的影响来评估Criteria criteria criteria criteria criteria criteria被视为珍贵的支持。