%0 Journal Article
%T Stable Field Emitters for a Miniature X-ray Tube Using Carbon Nanotube Drop Drying on a Flat Metal Tip
%A Heo SungHwan
%A Ihsan Aamir
%A Yoo SeungHwa
%A Ali Ghafar
%J Nanoscale Research Letters
%D 2010
%I Springer
%X Stable carbon nanotube (CNT) field emitters for a vacuum-sealed miniature X-ray tube have been fabricated. The field emitters with a uniform CNT coating are prepared by a simple drop drying of a CNT mixture solution that is composed of chemically modified multi-walled CNTs, silver nanoparticles, and isopropyl alcohol on flat tungsten tips. A highly thermal- and electrical-conductive silver layer strongly attaches CNTs to the tungsten tips. Consequently, the field emitters exhibit good electron emission stability: continuous electron emission of around 100 ¦ÌA at 2.3 V/¦Ìm has stably lasted over 40 h even at non-high vacuum ambient (~10 3 Pa).
%K Carbon nanotube
%K Field emission
%K Drop drying
%K Miniature X-ray tube
%U http://dx.doi.org/10.1007/s11671-010-9537-x