• 文献标题:   Characteristic Variations of Graphene Field-Effect Transistors Induced by CF4 Gas
  • 文献类型:   Article
  • 作  者:   PARK J, PARK KS, JEONG YS, BAEK KH, LEE BK, KIM DP, RYU JH, DO LM, IMAMURA H, YASE K, CHOI JS
  • 作者关键词:  
  • 出版物名称:   JAPANESE JOURNAL OF APPLIED PHYSICS
  • ISSN:   0021-4922 EI 1347-4065
  • 通讯作者地址:   Elect Telecommun Res Inst
  • 被引频次:   1
  • DOI:   10.1143/JJAP.51.081301
  • 出版年:   2012

▎ 摘  要

The influence of tetrafluoromethane (CF4) gas on the electrical characteristics of monolithic graphene field-effect transistors (FETs) is reported. Compared with the results in nitrogen ambient, FETs in CF4 ambient exhibit a positive shift in the Dirac point voltage and an increase in drain current. These changes are ascribed to the electronegative nature of the fluorine atoms in CF4 gas, which is found to induce p-type doping and excess charge carriers in graphene. The electrical response to CF4 gas exposure demonstrates the feasibility of using monolithic graphene FETs as chemical sensors. (c) 2012 The Japan Society of Applied Physics