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Ultra-sensitive hydrogen gas sensors based on Pd-decorated tin dioxide nanostructures: Room temperature operating sensors

Title
Ultra-sensitive hydrogen gas sensors based on Pd-decorated tin dioxide nanostructures: Room temperature operating sensors
Authors
Lee J.M.Park J.-E.Kim S.Lee E.Kim S.-J.Lee W.
Ewha Authors
김성진
SCOPUS Author ID
김성진scopus
Issue Date
2010
Journal Title
International Journal of Hydrogen Energy
ISSN
0360-3199JCR Link
Citation
vol. 35, no. 22, pp. 12568 - 12573
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We have investigated the fabrication of hydrogen gas sensors based on networks of Pd nanoparticles (NPs) deposited tin dioxide nanowires (NWs). SnO2 NWs with tin NPs attached on the surface were obtained by a simple thermal evaporation of SnO crystalline powders. The tin dioxide NWs were decorated with Pd NPs by the reduction process in Pd ion solution. The sensors showed ultra-high sensitivity (∼1.2 × 105%) and fast response time (∼2 s) upon exposure to 10,000 ppm H2 at room temperature. These sensors were also found to enable a significant electrical conductance modulation upon exposure to extremely low concentrations (40 ppm) of H2 in the air. Our fabrication method of sensors combining with Pd NPs, Sn NPs and n-type semiconducting SnO2 NWs allows optimized catalytic and depletion effect and results the production of highly-sensitive H2 sensors that exhibit a broad dynamic detection range, fast response times, and an ultra-low detection limit. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
DOI
10.1016/j.ijhydene.2010.08.026
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자연과학대학 > 화학·나노과학전공 > Journal papers
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