Field emission properties of single-walled carbon nanotube with amphoteric doping by encapsulation of TTF and TCNQ
- Authors
- Lee, Jungwoo; Lee, Wonjoo; Sim, Kijo; Han, Sung-hwan; Yi, Whikun
- Issue Date
- Mar-2008
- Publisher
- A V S AMER INST PHYSICS
- Citation
- JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, v.26, no.2, pp.847 - 850
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
- Volume
- 26
- Number
- 2
- Start Page
- 847
- End Page
- 850
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/178898
- DOI
- 10.1116/1.2870223
- ISSN
- 1071-1023
- Abstract
- Field emission (FE) currents were measured for prinstine single-walled carbon nanotubes (SWCNTs), and after encapsulation of electron withdrawing and donating molecule, i.e., 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) and tetrathiafulvalene (TTF). X-ray photoelectron spectrometer, infrared, and Raman spectrometer were used to confirm encapsulation. TCNQ-doped SWCNTs (TCNQ-SWCNT) enhanced, and TTF-doped SWCNTs (TTF-SWCNT) decreased FE properties compared with pristine SWCNTs. The turn-on field of the pristine SWCNTs, TCNQ-SWCNT, and TTF-SWCNT were calculated to be 2.5, 2.3, and 3.2 V/mu m, respectively, and the maximum currents were obtained, in turn, 180, 329, and 21 mu A/cm(2) at the electric field of 3.6 V/mu m. To explain the FE properties, the work function of doped SWCNTs were calculated from Fowler-Nordheim equation, and also the resistivity of three samples was measured by four-point probe method and compared with each other.
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