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Journal of Nanomaterials
Volume 2014, Article ID 951360, 9 pages
http://dx.doi.org/10.1155/2014/951360
Research Article

Horizontal Assembly of Single Nanowire Diode Fabricated by p-n Junction GaN NW Grown by MOCVD

1Semiconductor Materials and Process Laboratory, School of Advanced Materials Engineering, Research Center for Advanced Materials Development (RCAMD), Chonbuk National University, Jeonju 561-756, Republic of Korea
2Department of General Studies, Physics Group, Jubail University College, Royal Commission for Jubail, Jubail 10074, Saudi Arabia
3Department of Physics, Yonsei University, Seoul 120-749, Republic of Korea

Received 24 January 2014; Accepted 16 June 2014; Published 10 July 2014

Academic Editor: Alireza Talebitaher

Copyright © 2014 Ji-Hyeon Park et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Uniaxially p-n junction gallium nitride nanowires have been synthesized via metal-organic chemical vapor deposition method. Nanowires prepared on Si(111) substrates were found to grow perpendicular to the substrate, and the transmission electron microscopy studies demonstrated that the nanowires had singlecrystalline structures with a <0001> growth axis. The parallel assembly of the p-n junction nanowire was prepared on a Si substrate with a thermally grown SiO2 layer. The transport studies of horizontal gallium nitride nanowire structures assembled from p- and n-type materials show that these junctions correspond to well-defined p-n junction diodes. The p-n junction devices based on GaN nanowires suspended over the electrodes were fabricated and their electrical properties were investigated. The horizontally assembled gallium nitride nanowire diodes suspended over the electrodes exhibited a substantial increase in conductance under UV light exposure. Apart from the selectivity to different light wavelengths, high responsivity and extremely short response time have also been obtained.