발간논문

Home > KJMM 논문 > 발간논문

Vol.38, No.7, 930 ~ 935, 2000
Title
Pesearch Paper / Electronic . Magnetic & Optical materials : Effects of Chemical Surface Treatments on Field Emission of Diamond Film
한상윤Sang Youn Han,이종람Jong Lam Lee,백영준
Abstract
Field emission of diamond film was enhanced after surface treatments using boiling HCl and aqua regia solutions. The current generated by the emission of electron was increased and the threshold field was reduced from 18.1 to 13.8 V/㎛ by the surface treatment. The surface roughness was increased by 24.4% with aqua regia treatment, but the calculated current-voltage curves were not consistent with the measured ones. It was found that the binding energies of C-C and C-O bonds were increased after the aqua regia treatment and the Fermi level of the aqua-rigia-treated surface was increased by 2.2 eV. This provides evidence that the enhancement of electron emission originated from the reduction of work function, caused by the chemisorption of oxygen atoms. The effective electron affinity changed to negative, leading to the reduction of the potential barrier height and width for electron emission at the surface of diamond.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.