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Journal of Materials Science: Materials in Electronics
Published in: Journal of Materials Science: Materials in Electronics 8/2020

03-03-2020

Enhancing gas-sensing property and sensing mechanism at molecule level of the hollow microspheres assembled with ZnO nanoflakes exposing {001} facets

Authors: Yan Chen, Bin Liu, Junfang Liu, Cuijin Pei, Hua Zhao, Yonghui Shang, Heqing Yang

Published in: Journal of Materials Science: Materials in Electronics | Issue 8/2020

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Abstract

The hollow microspheres assembled with ZnO nanoflakes exposing {001} facets have been successfully synthesized by annealing ZnS nanospheres at 550 °C for 2 h. Response of the hollow microspheres assembled from ZnO nanoflakes for ethanol, acetone, or triethylamine is significantly higher than hollow microspheres assembled from ZnO nanorod with dominant {100} facets. The exposed Zn-terminated (001) face is considered to be an active surface for gas sensing. Threefold coordinated Zn (Zn3c) atom with a dangling bond on the Zn-terminated (001) surface serves as a gas-sensing active atom, and thus a gas-sensing mechanism at atomic and molecular level is proposed. The concept of unsaturated Zn3c atoms as a gas-sensing active atoms will be useful for designing of high-performance sensing materials.
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Metadata
Title
Enhancing gas-sensing property and sensing mechanism at molecule level of the hollow microspheres assembled with ZnO nanoflakes exposing {001} facets
Authors
Yan Chen
Bin Liu
Junfang Liu
Cuijin Pei
Hua Zhao
Yonghui Shang
Heqing Yang
Publication date
03-03-2020
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 8/2020
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-020-03165-5

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