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Opportunities and Challenges in Single-Molecule Sciences
2021-11-09

来源:化学系  供稿:      点击次数:  字号:【  

  时间:2021-11-10

  地点:实验楼107

  主持人:廖清

  主讲人:郭雪峰

  主讲人简历

  郭雪峰 北京大学长江特聘教授、国家杰出青年基金获得者。2004年于中科院化学所获博士学位,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,构建了必威网站靠谱吗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。已发表包括Science在内的SCI收录论文180篇(IF>10, 90篇),Scientific American、Nature、Science等期刊和媒体以不同的形式亮点报道过30余次,应邀在Chem. Rev.、Nat. Rev. Phys.、Acc. Chem. Res.和Chem. Soc. Rev.等必威网站靠谱吗权威期刊上撰写邀请综述。曾获全国百篇优秀博士论文奖、教育部自然科学奖一等奖、必威网站靠谱吗高等学校十大必威网站靠谱吗进展等奖励。

  讲座简介

  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 ?-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 ion, pH and light.

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