Catalyst/dopant-free growth of ZnO nanobelts with different optical properties from nanowires grown via a catalyst-assisted method

B. Q. Cao, Z. M. Liu, H. Y. Xu, H. B. Gong, D. Nakamura, K. Sakai, M. Higashihata, T. Okada

Research output: Contribution to journalArticle

12 Citations (Scopus)


The paper reported a simple but effective gold catalyst-tailored chemical vapour deposition (CVD) method to grow ZnO nanowires and nanobelts with different photoluminescence (PL) behaviours. ZnO nanowires along the c-axis were synthesized via a gold catalyst-assisted CVD method through the conventional vapour-liquid-solid (VLS) mechanism. But, ZnO nanobelts grew along the a-axis enclosed with {0110} and {0001} base planes without using any catalyst or dopant through the vapour-solid (VS) mechanism. The nanowires and nanobelts were proved to be of different optical quality, which was related with their growth process. Besides the different origin of the near-band-gap emission at room temperature, laser emission was only observed from ZnO nanobelts while the nanowires show anomalous photoluminescence behaviour under higher excitation density.

Original languageEnglish
Pages (from-to)4282-4287
Number of pages6
Issue number12
Publication statusPublished - Jun 21 2011


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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