Title of Paper:Electrical anisotropy properties of ZnO nanorods analyzed by conductive atomic force microscopy

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Date of Publication:2013-01-15

Journal:APPLIED SURFACE SCIENCE

Included Journals:SCIE、EI

Volume:265

Page Number:176-179

ISSN No.:0169-4332

Key Words:ZnO nanorods; Conductive atomic force microscopy; Schottky barrier height

Abstract:In this study, we have prepared ZnO nanorods on cracked GaN substrates using aqueous solution method. Unique electrical characterization of one individual lying ZnO nanorod is analyzed by conductive atomic force microscopy (C-AFM). Effect of anisotropy properties on the conductivity of a single nanorod has been investigated. The current maps of ZnO nanorods have been simultaneously recorded with the topography which is gained by AFM-contact mode. The C-AFM measurement present local current-voltage (I-V) characteristics of the side facets of one individual lying nanorod, however, no current is detected on the top facets of ZnO nanorods. Measurement results indicate that the side facets are more electrically active than the top facets of ZnO nanorods due to lower Schottky barrier height of the side facets. (C) 2012 Elsevier B.V. All rights reserved.