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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 1133-1136 |
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Farnood A, Ranjbar M, Salamati H. Plasmon coupling effect of Pd/Au thin films for sensing hydrogen gas. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :1133-1136
URL: http://opsi.ir/article-1-2206-en.html
URL: http://opsi.ir/article-1-2206-en.html
1- Department of Physics, Isfahan University of Technology, Isfahan, Iran
Abstract: (1348 Views)
In this study, nanoislands gold thin films were fabricated by pulsed laser deposition (PLD) method on quartz substrates at different substrate temperatures of 25, 300, 450 and 600 °C. A thin (4-5 nm) Pd film as hydrogen catalyst over-layer was sputter deposited on Au films. UV-Vis spectrometry showed localized surface plasmon resonance (LSPR) absorption shift for RT, 300, 450 and 600 °C substrate temperature. These spectral variations were mainly attributed to the layer morphology based on plasmon-coupling effect. Transmittance spectra at various hydrogen concentration of 0, 0.2, 0.5, 1, 2, 4, 6, 8 and 10% revealed that the layer created at room temperature provides the most spectral shift among other samples. Overall, we showed that plasmonic coupling of PLD derived Au thin films is a suitable tool for accurate detection of hydrogen.
Keywords: Au thin films, pulsed laser deposition, localized surface plasmon resonance, plasmon coupling and hydrogen sensing.
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