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Highly Sensitive Hydrogen Gas Sensors Based on Gold Nanoparticle Decorated Zinc Oxide Nanosheets

Aled R. Lewis, Josef Náhlík, Daniel R. Jones, Thierry Maffeis Orcid Logo

Procedia Engineering, Volume: 168, Pages: 321 - 324

Swansea University Author: Thierry Maffeis Orcid Logo

Abstract

Highly sensitive gold nanoparticle decorated zinc oxide nanosheet gas sensors have been fabricated using simple and rapid chemical methods capable of producing a normalised current gain of 2.54 (at 10V) in dry air containing 2.5ppm of hydrogen gas at 200C and a current gain of 382.53 under 125ppm. C...

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Published in: Procedia Engineering
ISSN: 1877-7058
Published: Proceedings of the 30th anniversary Eurosensors Conference – Eurosensors 2016 2016
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa31593
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Abstract: Highly sensitive gold nanoparticle decorated zinc oxide nanosheet gas sensors have been fabricated using simple and rapid chemical methods capable of producing a normalised current gain of 2.54 (at 10V) in dry air containing 2.5ppm of hydrogen gas at 200C and a current gain of 382.53 under 125ppm. Compared to undecorated sheet based sensors where a response of 1.24 was observed under 125ppm at 200C a massive relative increase in signal is observed. The zinc oxide nanosheets are produced via a previously reported simple microwave assisted hydrothermal growth method and gold nanoparticles with mean diameter of 5nm synthesized via a simple sodium borohydride reduction of hydrogen tetrachloroaurate in the presence of polyvinylpyrrolidone (PVP) followed by drop casting onto a pre-patterned aluminium oxide substrate.
College: College of Engineering
Start Page: 321
End Page: 324