计算物理 ›› 2010, Vol. 27 ›› Issue (5): 779-784.

• 研究论文 • 上一篇    下一篇

新型NO2化学传感器:碳化硅纳米管

丁瑞雪, 杨银堂, 刘帘曦   

  1. 宽禁带半导体材料与器件教育部重点实验室, 微电子学院, 西安电子科技大学, 陕西 西安 710071
  • 收稿日期:2009-07-17 修回日期:2009-12-27 出版日期:2010-09-25 发布日期:2010-09-25
  • 作者简介:丁瑞雪(1981-),male,Liaoning,Ph.D,research in SiC single crystal and SiCNT materials and devices.
  • 基金资助:
    Supported by the National Pre-Research Foundation of China (Grant No.51308030201 and Grant No.51323040118) and the Foundamental Research Found for central universities (Grant No.72105112)

Novel Chemical Sensor of NO2:Silicon Carbide Nanotubes

DING Ruixue, YANG Yintang, LIU Lianxi   

  1. Key Laboratory of Ministry of Education for Wide Band Gap Semiconductor Materials and Devices, School of Microelectronics, Xidian University, Xi'an 710071, China
  • Received:2009-07-17 Revised:2009-12-27 Online:2010-09-25 Published:2010-09-25
  • Supported by:
    Supported by the National Pre-Research Foundation of China (Grant No.51308030201 and Grant No.51323040118) and the Foundamental Research Found for central universities (Grant No.72105112)

摘要: 气体吸附对碳化硅纳米管的电子结构的影响是理解碳化硅纳米管气敏传感器工作机理的基础.基于密度泛函理论,利用CASTEP软件包计算NO2气体吸附前后的碳化硅纳米管的结构及其电子结构.结果表明,NO2气体与碳化硅纳米管间形成了稳定的吸附,并明显的增强了碳化硅纳米管的导电特性.碳化硅纳米管是制备气体传感器的理想材料之一,为开发应用于NO2气体检测的碳化硅纳米管提供必要的理论支持.

关键词: 碳化硅纳米管, NO2气敏传感器, 密度泛函理论

Abstract: Structure and electronic properties of silicon carbide nanotube(SiCNT) with and without adsorption of NO2 are calculated with CASTEP package based on density functional theory.A stable adsorption between nanotube and gas molecule is formed and conductivity of the SiCNT is improved obviously.It is shown that SiCNT is a potential candidate for gas sensors.It is expected to provide a useful guidance in developing SiCNT-based sensors for NO2 molecules.

Key words: SiCNT, NO2 gas sensor, density functional theory

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