Nanoscale Sensing of the Chemical and Physical Properties of Two-Dimensional Materials and Interfaces Using Scanning Probe Microscopy

哥伦比亚大学的George W. Flynn教授在化学系的大分子、超分子、纳米化学（MSN）项目的支持下，对石墨烯进行了一系列相关研究，以揭示界面分子的纳米级结构和动态特性。更具体地说，PI建议：(1)研究石墨烯的结构和电子特性；(2)测定吸附在石墨烯片上的卤素和金属原子的电荷掺杂特性；(3)研究石墨烯作为控制孔隙率的膜过滤器的潜在有效性；(4)探索六方氮化硼的原子水平结构和性能及其与石墨烯和石墨的潜在相互作用。研究主要是使用扫描隧道显微镜（STM）进行的。这些研究的首要目标是阐明控制石墨烯上分子的界面性质和自组织的驱动力。研究结果将影响下一代纳米级光学和电子器件。该项目由本科女生直接参与。教育活动还包括为哥伦比亚大学开发纳米科学和纳米技术教育材料，并为高中生提供周六科学增强体验。

Professor George W. Flynn of Columbia University is supported by the Macromolecular, Supramolecular, Nanochemistry (MSN) Program in the Division of Chemistry to conduct a series of related studies on graphene to reveal the nanoscale structure and dynamic properties of molecules at interfaces. More specifically, the PI proposes to: (1) investigate the structural and electronic properties of graphene; (2) determine the charge doping characteristics of halogens and metal atoms adsorbed on graphene sheets; (3) study the potential effectiveness of graphene as a membrane filter with controlled porosity; and (4) probe the atomic level structure and properties of hexagonal boron nitride and its potential interactions with graphene and graphite. The studies are primarily conducted using Scanning Tunneling Microscopy (STM).The overarching objective of these studies is the elucidation of the driving forces that control interfacial properties and self organization of molecules on graphene. The results will impact the next generation nanoscale optical and electronic devices. The project involves direct participation by undergraduate female students. The educational activities also include the development of education material on Nanoscience and Nanotechnology for Columbia University Summer and Saturday science enhancement experiences for high school students.