Catalyst-free synthesis of ZnO nanorods on metal substrates by using thermal chemical vapor deposition

Seung Sik Park, Jin Moo Lee, Sung Jin Kim, Sang Woo Kim, Hyun Hwi Lee, Sang Hyeob Kim, Shizuo Fujita

Research output: Contribution to journalArticlepeer-review


We report successful synthesis of ZnO nanorods on metal (Cr)-deposited Si substrates in a thermal chemical vapor deposition (CVD) process via a self-catalytic mechanism at relatively low growth temperatures of 400 and 500 °C. The nanotips were densely grown onto the Cr layer while ZnO nanorods with low density were synthesized on the same substrates. Grazing-incident wide-angle X-ray scattering measurements showed a uniform distribution and a random directionality of the nanotips and the nanorods grown on Cr-deposited Si substrates. Free-exciton emission from the nanorods was clearly observed from the samples at a very low temperature of 50 K in the photolu-minescence measurements. In addition, strong free exciton and relatively weak deep level emission bands were detected from both samples even at room temperature, indicating the ZnO nanotips and nanorods on Cr/Si substrates in this work had a low defect density.

Original languageEnglish
Pages (from-to)183-187
Number of pages5
JournalJournal of the Korean Physical Society
Issue number1
Publication statusPublished - 2008 Jul

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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