ZnO nanotips and nanorods on carbon nanotube/Si substrates: Anomalous p-type like optical properties of undoped ZnO nanotips

Seung Sik Park, Jin Moo Lee, Sung Jin Kim, Sang Woo Kim, Min Su Yi, Sang Hyeob Kim, Sunglyul Maeng, Shizuo Fujita

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15 Citations (Scopus)

Abstract

ZnO nanotips and nanorods were grown on screen-printed multi-walled carbon nanotube (MWCNT) films via thermal chemical vapor deposition at relative low growth temperatures of 400 and 500°C. Uniform formation of ZnO nanotips and nanorods occurred on MWCNT-printed Si substrates, but were rarely observed on bare Si substrates at the same growth temperatures. In photoluminescence (PL) measurements, it was found that ZnO nanorods exhibit typical intrinsic optical properties, while ZnO nanotips revealed p-type like luminescence behavior. Acceptor-related emission bands originating from neutral acceptor-bound exciton, free-to-acceptor and donor-acceptor pair transitions are clearly observed in temperature-dependent PL spectra of ZnO nanotips.

Original languageEnglish
Article number245708
JournalNanotechnology
Volume19
Issue number24
DOIs
Publication statusPublished - 2008 Jun 18

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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