Abstract
Nowadays, the plasmonic properties of defective transition metal oxides, have attracted great attention in the sensing and catalyst applications. The aim of this paper is to fabricate plasmonic Au-MoOx nanoparticles (NPs) using a facile anodizing in liquid approach to be used as localized surface plasmon resonance (LSPR) hydrogen sensor. Firstly, dark blue MoOx nanosheets with a strong NIR (700–800 nm) LSPR band were obtained. The Au-MoOx NPs (Au size=5–7 nm) were then obtained by adding a gold cation into the blue MoOx liquid base. Thanks to the catalytic properties of Au NP, this system exhibited LSPR hydrogen sensing ability where the LSPR variations allowed us to detect hydrogen in the 0–3% concentration range with a good linearity and possible many data points.
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