Seung-Sik Park et al 2008 Nanotechnology 19 245708 doi:10.1088/0957-4484/19/24/245708
Seung-Sik Park1, Jin-Moo Lee1, Sung-Jin Kim1, Sang-Woo Kim1, Min-Su Yi2, Sang-Hyeob Kim3, Sunglyul Maeng4 and Shizuo Fujita5
Show affiliationsZnO 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.
78.67.-n Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
73.22.Lp Collective excitations
81.16.Be Chemical synthesis methods
81.15.Gh Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, etc.)
Condensed matter: electrical, magnetic and optical
Issue 24 (18 June 2008)
Received 29 November 2007, in final form 28 February 2008
Published 12 May 2008
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