Acta Chimica Sinica ›› 2013, Vol. 71 ›› Issue (04): 478-484.DOI: 10.6023/A13010024 Previous Articles     Next Articles



刘松a, 郭雪峰a,b   

  1. a 北京大学化学与分子工程学院 北京 100871;
    b 北京大学工学院材料科学和工程系 北京 100871
  • 投稿日期:2013-01-06 发布日期:2013-02-20
  • 通讯作者: 郭雪峰
  • 基金资助:

    项目受国家自然科学基金(Nos. 21225311, 51121091, 2112016)、国家重点基础研究发展计划(973) (No. 2012CB921404)、高等学校学科创新引智计划(No. B08001)和北京市科技新星(No. 2009A01)资助.

Functional Single-Walled Carbon Nanotube-based Molecular Devices

Liu Songa, Guo Xuefenga,b   

  1. a College of Chemistry and Molecular Engineering, Peking University, Beijing 100871;
    b Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871
  • Received:2013-01-06 Published:2013-02-20
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos. 21225311, 51121091 and 2112016), the National Key Basic Research Program of China (973) (No. 2012CB921404), the 111 Project (No. B08001) and the BSTSP (No. 2009A01).

Because of the nature of their one-dimensional structure, good conductivity and excellent ballistic transport property, single-walled carbon nanotubes have been considered as an important nanomaterial in building a new generation of electrical circuits. In this article, we mainly focus on two strategies developed for installing diverse functionalities into single-walled carbon nanotube-based molecular transistors: nanolithographic method and surface chemical modification. To overcome ill-defined contacts between molecules and electrodes, we highlight the current effort and direction in the creation of reliable single-molecule devices using carboxylic acid-functionalized single-walled carbon nanotubes as nanogapped point contacts. These contacts are made by high-resolution electron beam lithography and oxygen plasma oxidative etching. Electrically functional molecules are then covalently bridged into the nanogaps through robust amide linkages, thus forming stable molecular electronic devices. These results open up new opportunities to develop unique single-molecule biosensors with high selectivity and high speed, which hold great promise in both industrial applications and basic scientific researches.

Key words: single-walled carbon nanotube, single-molecule device, nanolithography, surface chemical modification