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Structure and humidity sensing properties of SnO 2 zigzag belts
Author(s) -
Li Lijun,
Yu Ke,
Wu Jin,
Wang Yang,
Zhu Ziqiang
Publication year - 2010
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200900718
Subject(s) - zigzag , transmission electron microscopy , materials science , humidity , scanning electron microscope , relative humidity , nanotechnology , nanostructure , diffraction , chemical engineering , crystallography , chemistry , composite material , optics , geometry , meteorology , geography , mathematics , engineering , physics
A novel method was developed for synthesizing ultralong SnO 2 zigzag belts with the assistance of CuO powder. The crystalline structure and morphology of SnO 2 zigzag belts were characterized using x‐ray diffraction, scanning electron microscopy and transmission electron microscopy. The growth mechanism of the ultralong SnO 2 zigzag belts and the catalytic behavior of the copper were discussed. The humidity sensor based on as‐synthesized product shows high sensitivity and fast response time due to unique structure of the SnO 2 zigzag belts with large surface‐to‐volume ratio. It can be found that the resistance of the SnO 2 materials decreases obviously with increasing relative humidity (RH) at room temperature (26 °C). The results demonstrate that these SnO 2 nanostructures are potential to be used as effective and high performance humidity sensors. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)