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 μA at 2.3 V/μm has stably lasted over 40 h even at non-high vacuum ambient (~10 -3 Pa). © 2010 The Author(s).
CITATION STYLE
Heo, S. H., Ihsan, A., Yoo, S. H., Ali, G., & Cho, S. O. (2010). Stable field emitters for a miniature X-ray tube using carbon nanotube drop drying on a flat metal tip. Nanoscale Research Letters, 5(4), 720–724. https://doi.org/10.1007/s11671-010-9537-x
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