Nano Express

Nanoscale Research Letters

, Volume 2, Issue 3, pp 161-167

Open Access This content is freely available online to anyone, anywhere at any time.

Ultra violet sensors based on nanostructured ZnO spheres in network of nanowires: a novel approach

  • S. S. HullavaradAffiliated withOffice of Electronic Miniaturization, University of Alaska Fairbanks Email author 
  • , N. V. HullavaradAffiliated withOffice of Electronic Miniaturization, University of Alaska Fairbanks
  • , P. C. KarulkarAffiliated withOffice of Electronic Miniaturization, University of Alaska Fairbanks
  • , A. LuykxAffiliated withCenter for Superconductivity Research, University of Maryland
  • , P. ValdiviaAffiliated withCenter for Superconductivity Research, University of Maryland

Abstract

The ZnO nanostructures consisting of micro spheres in a network of nano wires were synthesized by direct vapor phase method. X-ray Photoelectron Spectroscopy measurements were carried out to understand the chemical nature of the sample. ZnO nanostructures exhibited band edge luminescence at 383 nm. The nanostructure based ZnO thin films were used to fabricate UV sensors. The photoresponse measurements were carried out and the responsivity was measured to be 50 mA W−1. The rise and decay time measurements were also measured.

Keywords

UV Sensor Nano structures Micro-spheres Nanowire network Rise/Decay time Photoresponse Photoluminescence