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Abstract
Here we report on a hydrogen gas sensor comprised of Pt-WO3 nano-/micro- powder films, which were produced using nanosecond pulsed laser ablation and deposition on a silica glass substrate under atmospheric conditions. An all- optical non-contact method of probing its electromagnetic radiation transmittance in the near-IR 1.3 μm telecommunications frequency band was employed for rapid ~10 s timescale detection of low-concentration (below 4% by volume) hydrogen gas admixtures. Discussion on optimizing the composition of the Pt- WO3 alloy and its processing conditions and temperatures for best performance is provided.
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