Studies of Surface Electrical Properties of Al doped ZnO Nanorods by STM

Authors

  • Shaivalini SINGH Yeungnam University
  • Sumit VYAS Motilal Nehru-NIT
  • Parthasarthi CHAKRABARTI Motilal Nehru-NIT
  • Si-Hyun PARK Yeungnam University

DOI:

https://doi.org/10.5755/j01.ms.23.2.15305

Keywords:

hydrothermal, Al doped ZnO, nanorods, scanning tunnelling microscopy, X-ray diffraction

Abstract

Pure and aluminum (Al) doped ZnO (Al:ZnO) nanorods (NRs) were deposited on silicon substrates by the hydrothermal method. The Al composition was kept at 2 % and 5 % for the Al:ZnO NR samples. The surface morphology and structural properties of the pure and Al:ZnO NRs were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The XRD study revealed the hexagonal phase of the ZnO with (101), (002) and (100) peaks and it also revealed that the major orientation of ZnO NRs were along the (002) planes. The SEM micrographs showed perfectly grown ZnO NRs with hexagonal shaped tips. The electrical characterization of the pure and Al:ZnO NR thin film surface was done by scanning tunneling microscopy (STM). Local electron spectroscopy was conducted to measure the tunneling current with respect to the applied bias. The n-type behavior and bandgap of the pure and Al:ZnO NRs were confirmed from the dI/dVV characteristics. These studies are of fundamental importance for the fabrication of pure and Al:ZnO NR based nanodevices.

DOI: http://dx.doi.org/10.5755/j01.ms.23.2.15305

Author Biographies

Shaivalini SINGH, Yeungnam University

Department of Electronic Engineering

Sumit VYAS, Motilal Nehru-NIT

Department of Electronics and Communication Engineering

Parthasarthi CHAKRABARTI, Motilal Nehru-NIT

Department of Electronics and Communication Engineering

Si-Hyun PARK, Yeungnam University

Associate Professor,

Department of Electronic Engineering

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Published

2017-02-14

Issue

Section

ELECTRONIC AND OPTICAL MATERIALS