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Journal of Electronic Materials

, Volume 42, Issue 5, pp 894–900 | Cite as

A Comparison of ZnO Nanowires and Nanorods Grown Using MOCVD and Hydrothermal Processes

  • Abdiel Rivera
  • John Zeller
  • Ashok Sood
  • Mehdi Anwar
Article

Abstract

A comparison of ZnO nanowires (NWs) and nanorods (NRs) grown using metalorganic chemical vapor deposition (MOCVD) and hydrothermal synthesis, respectively, on p-Si (100), GaN/sapphire, and SiO2 substrates is reported. Scanning electron microscopy (SEM) images reveal that ZnO NWs grown using MOCVD had diameters varying from 20 nm to 150 nm and approximate lengths ranging from 0.7 μm to 2 μm. The NWs exhibited clean termination/tips in the absence of any secondary nucleation. The NRs grown using the hydrothermal method had diameters varying between 200 nm and 350 nm with approximate lengths between 0.7 μm and 1 μm. However, the NRs grown on p-Si overlapped with each other and showed secondary nucleation. x-Ray diffraction (XRD) of (0002)-oriented ZnO NWs grown on GaN using MOCVD demonstrated a full-width at half-maximum (FWHM) of 0.0498 (θ) compared with 0.052 (θ) for ZnO NRs grown on similar substrates using hydrothermal synthesis, showing better crystal quality. Similar crystal quality was observed for NWs grown on p-Si and SiO2 substrates. Photoluminescence (PL) of the NWs grown on p-Si and SiO2 showed a single absorption peak attributed to exciton–exciton recombination. ZnO NWs grown on GaN/sapphire had defects associated with oxygen interstitials and oxygen vacancies.

Keywords

ZnO nanowires nanorods MOCVD hydrothermal photoluminescence 

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Copyright information

© TMS 2013

Authors and Affiliations

  • Abdiel Rivera
    • 1
  • John Zeller
    • 2
  • Ashok Sood
    • 2
  • Mehdi Anwar
    • 1
  1. 1.Electrical and Computer EngineeringUniversity of ConnecticutStorrsUSA
  2. 2.Magnolia Optical TechnologiesWoburnUSA

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