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- W4287307923 abstract "This work demonstrates an optical gas sensor based on the surface plasmon resonance (SPR) of nanoporous gold (NPG) thin films. The NPG films are prepared by a sputtering-dealloying combined method, and they can support the propagating surface plasmon mode and adsorb a large number of gaseous molecules; the interaction of the internal plasmon field and the adsorbed molecules enables the NPG-SPR sensor to have high sensitivity. The Kretschmann-type spectral NPG-SPR sensor is fabricated with a 60-nm-thick NPG film, and its spectral response to toxic H 2 S gas was investigated at room temperature. The optimal sensitivity of the sensor to H 2 S was achieved by controlling the dealloying time to tune the film porosity. Comparison of the spectral sensitivity to 100 ppm H 2 S indicates that the NPG-SPR sensor is at least six times more sensitive than a conventional Au-SPR sensor." @default.
- W4287307923 created "2022-07-25" @default.
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- W4287307923 date "2022-08-09" @default.
- W4287307923 modified "2023-10-18" @default.
- W4287307923 title "Surface plasmon resonance gas sensor with a nanoporous gold film" @default.
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- W4287307923 doi "https://doi.org/10.1364/ol.461408" @default.
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