Selective growth of ZnO nanorods and its gas sensor application

Shao Lin Zhang, Jeong Ok Lim, Jeung Soo Huh, Wooyoung Lee

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The facile sonochemical method has been used to selectively grow a ZnO nanorods sensing layer directly on an alumina substrate. The growth region of the ZnO nanorods array is precisely controlled by a pre-coated Pt/Zn seed layer on alumina substrate. No growth of ZnO nanostructure is found on the substrate without seed layer. The grown ZnO nanorods are well aligned and densely packed, with wurtzite crystal structure and flat hexagonal tip. The sensing properties of the obtained ZnO nanorods sensing layer to three kinds of toxic gases (NH 3, CO, and CH 4) have been investigated. The sensing observation revealed that the selectively grown ZnO nanorods demonstrated good response, repeatability, and excellent linearity toward toxic gases. This result indicates that selective growth of ZnO nanorods directly on sensor substrate is an accessible and advantageous method for sensor fabrication.

Original languageEnglish
Article number6256685
Pages (from-to)3143-3148
Number of pages6
JournalIEEE Sensors Journal
Volume12
Issue number11
DOIs
Publication statusPublished - 2012

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

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