双元纳米金属二维超晶用于分子器件电极阵列的可控制备及其功能化

针对构建基于金属电极的分子结问题，本项目提出了双元金属纳米颗粒电极阵列的构筑策略，力求突破传统单元金属电极的桎梏。通过换链的方式在电极之间嵌接活性功能分子，建立功能化分子结网络。本项目拟制备可调谐等离子激元共振效应（LSPR）的双元纳米颗粒超晶格（BNSLs）结构，并用作等离子开关来驱动和调控功能分子的活性双态，以探讨功能分子的电子输运机制。通过研究颗粒粒径比、浓度比、生长环境影响BNSLs生长的关键因素，探索精控多组元密堆积超结构的生长机制，实现双元电极的LSPR峰位的按需调控，阐明晶体结构和分子长度等因素对调节LSPR峰的影响机理，揭示电极间距与共振峰位的内在关联，探明LSPR峰位偏移控制功能分子活性双态的调节机制，并理解以分子双态驱动分子机器的可逆及可控的机械运动原理。为实现分子器件量身定制的电子特性及协同性能提供设计思想、电极材料依据与实现途径。

In order to build molecular junctions based on metal electrodes, we propose here a binary metal nanoparticle electrode array construction strategy and strives to break through the defects of traditional single metal electrodes. The active functional molecules are embedded between the electrodes through chain exchange to establish a functional molecular junction network. This project intends to prepare a binary nanocrystal superlattices (BNSLs) with tunable localized surface plasmon resonance (LSPR), which is used as a plasmonic switch to drive and regulate the active two-states of functional molecules to explore the electronic transport mechanism in the functional molecules. By studying the key factors such as the particle size ratio, concentration ratio, growth environment which affect the growth of BNSLs, it is possible to explore the growth mechanism of precise multicomponent dense superstructures and realize the on-demand modulation of the LSPR peak position of binary electrodes and elucidate the influence of the crystal structure and molecules length on the adjustment of Plasmon resonance absorption peaks. It reveals the intrinsic correlation between electrode spacing and resonance peak position. The controlling mechanism of the LSPR peak shift on the regulation of the two-state will be investigated. The inverse and controllable mechanical movement principle of molecular machines driven by molecular two-states will also be studied. All this will give a solid base to realize the tailored electronic characteristics and synergistic performance of the molecular device.