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Sensors 2011, 11(1), 825-851; doi:10.3390/s110100825

Low-Dimensional Palladium Nanostructures for Fast and Reliable Hydrogen Gas Detection

Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea
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Author to whom correspondence should be addressed.
Received: 2 November 2010 / Revised: 22 December 2010 / Accepted: 10 January 2011 / Published: 13 January 2011
(This article belongs to the Special Issue Gas Sensors - 2010)

Abstract

Palladium (Pd) has received attention as an ideal hydrogen sensor material due to its properties such as high sensitivity and selectivity to hydrogen gas, fast response, and operability at room temperature. Interestingly, various Pd nanostructures that have been realized by recent developments in nanotechnologies are known to show better performance than bulk Pd. This review highlights the characteristic properties, issues, and their possible solutions of hydrogen sensors based on the low-dimensional Pd nanostructures with more emphasis on Pd thin films and Pd nanowires. The finite size effects, relative strengths and weaknesses of the respective Pd nanostructures are discussed in terms of performance, manufacturability, and practical applicability.
Keywords: Pd nanostructures; hydrogen sensors Pd nanostructures; hydrogen sensors
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Noh, J.-S.; Lee, J.M.; Lee, W. Low-Dimensional Palladium Nanostructures for Fast and Reliable Hydrogen Gas Detection. Sensors 2011, 11, 825-851.

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