Super growth of vertically-aligned carbon nanofibers and their field emission properties

Title
Super growth of vertically-aligned carbon nanofibers and their field emission properties
Authors
강정호신동훈윤기남펠리시타이철진김명종
Keywords
carbon nanofiber; super growth; field emission
Issue Date
2014-11
Publisher
Carbon
Citation
VOL 79, 149-155
Abstract
We demonstrate a very efficient synthesis of vertically-aligned ultra-long carbon nanofibers (CNFs) with sharp tip ends using thermal chemical vapor deposition. Millimeter-scale CNFs with a diameter of less than 50 nm are readily grown on palladium thin film deposited Al2O3 substrate, which activate the conical stacking of graphitic platelets. The field emission performance of the as-grown CNFs is better than that of previous CNFs due to their extremely high aspect ratio and sharp tip angle. The CNF array gives the turn-on electric field of 0.9 V/μm, the maximum emission current density of 6.3 mA/cm2 at 2 V/μm, and the field enhancement factor of 2585.
URI
http://pubs.kist.re.kr/handle/201004/48110
ISSN
00086223
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KIST Publication > Article
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