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Growth of ultralong ZnO microwire and its application in isolatable and flexible piezoelectric strain sensor
Author(s) -
Sun Kaitong,
Zhang Heqiu,
Hu Lizhong,
Yu Dongqi,
Qiao Shuangshuang,
Sun Jingchang,
Bian Jiming,
Chen Xi,
Zhang Lingxuan,
Fu Qiang,
Zhao Ziwen
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925468
Subject(s) - piezoelectricity , gauge factor , strain gauge , nanotechnology , strain (injury) , chemistry , deposition (geology) , chemical vapor deposition , materials science , composite material , optoelectronics , fabrication , medicine , alternative medicine , pathology , paleontology , sediment , biology
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.