Journal
SOLID-STATE ELECTRONICS
Volume 116, Issue -, Pages 124-129Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sse.2015.10.011
Keywords
Electrophoretic deposition; Hydrogen sensor; ZnO nanorods; Graphite based junction
Funding
- EU COST Action [TD1105, LD14111]
- Czech Science Foundation [15-17044S]
- United States National Science Foundation [DMR-1361068]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1361068] Funding Source: National Science Foundation
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We report on the performance of solution-processed hydrogen sensors based on vertical arrays of ZnO nanorods with Schottky contacts. The vertical arrays of ZnO nanorods are grown by a low temperature hydrothermal method on a seed layer consisting of electrophoretically deposited ZnO nanoparticles. A Schottky contact on the ZnO nanorod arrays is created by the deposition of graphite from a colloidal solution. The structure of the graphite/ZnO nanorod system is shown to be sensitive to hydrogen at room temperature. The hydrogen sensing properties are further enhanced by the decoration of the graphite/ZnO nanorod interface with Pt nanoparticles. The sensing response is improved by a factor of 100, and faster recovery and response times are observed. (C) 2015 Elsevier Ltd. All rights reserved.
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