报告内容简介：

This talk will exemplify our on-going interest and great effort in developing efficient lithographic methodologies capable of creating molecular electronic devices through the combination of top-down micro/nanofabrication with bottom-up molecular assembly. These devices use nanogapped carbon nanomaterials (such as single-walled carbon nanotubes (SWCNTs) and graphene) as point contacts formed by electron beam lithography and precise oxygen plasma etching. Through robust amide linkages, functional molecular bridges terminated with diamine moieties are covalently wired into the carboxylic acid-functionalized nanogaps to form stable carbon electrode-molecule junctions with desired functionalities. We have used these approaches to reveal the dependence of the charge transport of individual metallo-DNA duplexes on p-stacking integrity, and fabricate molecular devices capable of realizing label-free, real-time electrical detection of chemical reactions or biological interactions at the single-event level, or switching their molecular conductance upon exposure to external stimuli, such as electric field, magnetic field, ion, pH and light.

报告人简介:

郭雪峰，北京大学长江特聘教授、国家杰出青年基金获得者和中组部万人计划科技创新领军人才。2001年于北京师范大学获得学士和硕士学位，2004年于中国科学院化学研究所获得博士学位，2004~2007年在哥伦比亚大学从事博士后研究工作，2008年入职北京大学。长期从事分子材料和器件的研究，发展了制备稳定单分子器件的突破性方法，构建了国际首例稳定可控的单分子电子开关器件，发展了单分子电学检测的核心技术，开拓了单分子科学与技术研究的新领域。