ETRI-Knowledge Sharing Plaform

ENGLISH

성과물

논문 검색
구분 SCI
연도 ~ 키워드

상세정보

학술지 Great Improvement in Adhesion and Uniformity of Carbon Nanotube Field Emitters Through Reactive Nanometer-Scale SiC Fillers
Cited 44 time in scopus Download 5 time Share share facebook twitter linkedin kakaostory
저자
김재우, 정진우, 강준태, 최성열, 박소라, 신민식, 안승준, 송윤호
발행일
201502
출처
Carbon, v.82, pp.245-253
ISSN
0008-6223
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.carbon.2014.10.068
협약과제
14ZE1100, ETRI 창의연구실 사업, 손승원
초록
We developed highly adhesive uniform field emitters (FEs) from carbon nanotube (CNT) pastes by reacting nanometer-scale silicon carbide (SiC) fillers on a Kovar substrate at a high temperature in vacuum. The reaction of SiC on Kovar results in significant morphological changes at the substrate-composite interface along with moderate Si diffusion into the substrate, enhancing adhesion of CNT FEs to the substrate greatly. Furthermore, a post surface- treatment after the reaction of SiC fillers results in very uniform CNT FEs over an entire emitter pattern of several hundred micrometers. The strongly enhanced adhesion and uniformity of the CNT FEs, in turn, give stable and reliable field emission even at a high current density. The applicability of the SiC/CNT FEs was evaluated in super-miniature Xray tubes where any detachment of materials including outgassing from the inner side of the tubes should be avoided. The smallest super-miniature CNT X-ray tube to date, with an outer diameter of 2.0 mm, shows good operation with X-ray imaging at an anode voltage of above 25 kV, confirming almost no outgassing and strong substrate adhesion of the CNT FEs.
KSP 제안 키워드
Anode voltage, Carbon nano-tube(CNT), Enhanced adhesion, High Temperature, Nanometer-scale, Outer diameter, Si diffusion, X-ray imaging, composite interface, field emission, field emitter