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

Jungho Kang, Dong Hoon Shin, Ki Nam Yun, Felisita Annisanti Masud, Cheol Jin Lee, Myung Jong Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

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/lm, the maximum emission current density of 6.3 mA/cm2 at 2 V/lm, and the field enhancement factor of 2585.

Original languageEnglish
Pages (from-to)149-155
Number of pages7
JournalCarbon
Volume79
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

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ASJC Scopus subject areas

  • Chemistry(all)

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