title: Transition of single-walled carbon nanotubes from metallic to semiconducting in field-effect transistors by hydrogen plasma treatment.
abstract: We report hydrogen plasma treatment results on converting the metallic single-walled carbon nanotubes to semiconducting single-walled carbon nanotubes. We found that the as-grown single-walled carbon nanotubes (SWNTs) can be sorted as three groups which behave as metallic, as-metallic, and semiconducting SWNTs. These three groups have different changes under hydrogen plasma treatment and successive annealing process. The SWNTs can be easily hydrogenated in the hydrogen plasma environment and the as-metallic SWNTs can be transformed to semiconducting SWNTs. The successive annealing process can break the C-H bond, so the conversion is reversible.
authors.affiliation: Department of Physics and Tsinghua-Foxconn Nanotechnology Research Centre, Tsinghua University, Beijing 100084, People's Republic of China.
authors.forename: Gang
authors.initials: G
authors.lastname: Zheng
authors.forename: Qunqing
authors.initials: Q
authors.lastname: Li
authors.forename: Kaili
authors.initials: K
authors.lastname: Jiang
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Zhang
authors.forename: Jia
authors.initials: J
authors.lastname: Chen
authors.forename: Zheng
authors.initials: Z
authors.lastname: Ren
authors.forename: Shoushan
authors.initials: S
authors.lastname: Fan
mesh_terms: D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006358:Hot Temperature; D006859:Hydrogen / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008670:Metals / Q000737:chemistry*; D008839:Microelectrodes; D008968:Molecular Conformation; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D044367:Phase Transition; D012666:Semiconductors; D013499:Surface Properties; D014173:Transistors, Electronic
chemical_list: D046911:Macromolecular Substances; D008670:Metals; D037742:Nanotubes, Carbon; D006859:Hydrogen