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Indexed by:期刊论文

Date of Publication:2010-02-01

Journal:PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE

Included Journals:SCIE、EI、Scopus

Volume:207

Issue:2

Page Number:488-492

ISSN No.:1862-6300

Abstract:Ultralong ZnO piezoelectric-fine-wires (PFWs) with a perfect hexagonal structure have been prepared by an upstream growing chemical vapor deposition (CVD) method. Furthermore, isolatable and flexible piezoelectric strain sensors based on individual ZnO PFWs have been fabricated by a simple and reliable technique. The whole device was fully packaged by epoxy polymeric resin (EPR). The I-V characteristic of the isolatable sensor is highly sensitive to the strain applied on it, which was well interpreted in terms of variation in Schottky barrier height (SBH) caused by strain induced band structure change and piezoelectric effect. The sensor exhibited excellent stability and fine reversibility, and a remarkably high gauge factor up to 1010 had been achieved. It is expected that the isolatable and flexible piezoelectric strain sensor demonstrated here will have applications in detection of external mechanical forces, as well as electromechanical switch with a high ON/OFF ratio. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim