Surface modification of hydrothermally grown ZnO nanostructures with process parameters

J. P. Kar, S. N. Das, S. W. Lee, M. H. Ham, J. H. Choi, J. M. Myoung

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

ZnO nanorods (NRs) were hydrothermally synthesized by using equimolar zinc nitrate hydrate (Zn(NO3)2 · 6H2O) and hexamethylenetetramine (C6H12N4) solutions. The shape of the nanostructures, obtained by aqueous method, was greatly influenced by the growth temperature and the molar concentrations. NRs grown at higher temperature (90°C) have rounded tips, whereas nanostructures of hexagonal flat-end shape were obtained at 75°C. Hardly any nanostructures were observed by further reducing the temperature to 60°C. In addition, solutions with higher molarity favored the appearance of nanoflowers. Scattered ZnO NRs were observed on silicon substrate, whereas aligned ZnO nanowires (NWs) 50-70nm in diameter were obtained at 75°C by introducing sputtered ZnO film as a seed layer. Highresolution transmission electron microscopy (HRTEM) confirmed the growth of ZnO nanowires along [001] direction. A band-edge luminescence along with a broad visible spectrum was observed for the ZnO nanowires.

Original languageEnglish
Pages (from-to)1130-1138
Number of pages9
JournalChemical Engineering Communications
Volume196
Issue number9
DOIs
Publication statusPublished - 2009 Sep 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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