Effect of few-walled carbon nanotube crystallinity on electron field emission property

정해득; 이종혁; 이병갑; 정희진; Geon-Woong Lee (이건웅); Bang, Dae-Suk (방대석); Donghwan Cho (조동환); Park Young-Bin (박영빈); Jhee, Kwang-Hwan (지광환)

Effect of few-walled carbon nanotube crystallinity on electron field emission property

Carbon Letters
Abbr : Carbon Lett.
2011, 12(4), pp.207-217
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General

정해득 ¹, 이종혁 ¹, 이병갑 ¹, 정희진 ², Geon-Woong Lee ², Bang, Dae-Suk ¹, Donghwan Cho ¹, Park Young-Bin ³, Jhee, Kwang-Hwan ¹

¹금오공과대학교
²한국전기연구원
³울산과학기술대학교

Candidate

ABSTRACT

We discuss the influence of few-walled carbon nanotubes (FWCNTs) treated with nitric acid and/or sulfuric acid on field emission characteristics. FWCNTs/tetraethyl orthosilicate (TEOS) thin film field emitters were fabricated by a spray method using FWCNTs/TEOS sol one-component solution onto indium tin oxide (ITO) glass. After thermal curing, they were found tightly adhered to the ITO glass, and after an activation process by a taping method,numerous FWCNTs were aligned preferentially in the vertical direction. Pristine FWCNT/TEOS-based field emitters revealed higher current density, lower turn-on field, and a higher field enhancement factor than the oxidized FWCNTs-based field emitters. However, the unstable dispersion of pristine FWCNT in TEOS/N,N-dimethylformamide solution was not applicable to the field emitter fabrication using a spray method. Although the field emitter of nitric acid-treated FWCNT showed slightly lower field emission characteristics, this could be improved by the introduction of metal nanoparticles or resistive layer coating. Thus, we can conclude that our spray method using nitric acid-treated FWCNT could be useful for fabricating a field emitter and offers several advantages compared to previously reported techniques such as chemical vapor deposition and screen printing.

KEYWORDS

carbon nanotube, tetraethyl orthosilicate, field emitter, spray coating

Citation status

* References for papers published after 2023 are currently being built.

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