Surface plasmon-enhanced gas sensing in single gold-peapodded silica nanowires

Sheng Bo Wang; Yi Fan Huang; Surojit Chattopadhyay; Shoou Jinn Chang; Ruei San Chen; Cheong Wei Chong; Ming Shien Hu; Li Chyong Chen; Kuei Hsien Chen

doi:10.1038/am.2013.17

Surface plasmon-enhanced gas sensing in single gold-peapodded silica nanowires

Sheng Bo Wang, Yi Fan Huang, Surojit Chattopadhyay, Shoou Jinn Chang, Ruei San Chen, Cheong Wei Chong, Ming Shien Hu, Li Chyong Chen, Kuei Hsien Chen

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

An intriguing system featuring a wide band gap silica nanowire (SiO _xNW) that absorbs visible light (532 nm) via the surface plasmons (SPs) of embedded gold nanoparticles (Au NPs) is reported for sensing applications. We report SP resonance enhanced molecular oxygen sensing by single Au-NPs@SiO_x NWs under 532-nm illumination (visible light) at room temperature. Excellent selectivity of the Au-NPs@SiO_x NWs to molecular oxygen in air has been demonstrated. Illumination improved the sensing properties in terms of response and fast recovery time, which can be attributed to the photogenerated hole-mediated oxygen desorption. A general strategy of light-modulated sensing, vis-à -vis dark, is demonstrated in a wide band gap single NW system that could potentially open up routes for biosensing, because silica and Au both lack biotoxicity.

Original language	English
Article number	e49
Journal	NPG Asia Materials
Volume	5
Issue number	5
DOIs	https://doi.org/10.1038/am.2013.17
Publication status	Published - 2013 May

All Science Journal Classification (ASJC) codes

Modelling and Simulation
General Materials Science
Condensed Matter Physics

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10.1038/am.2013.17

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title = "Surface plasmon-enhanced gas sensing in single gold-peapodded silica nanowires",

abstract = "An intriguing system featuring a wide band gap silica nanowire (SiO xNW) that absorbs visible light (532 nm) via the surface plasmons (SPs) of embedded gold nanoparticles (Au NPs) is reported for sensing applications. We report SP resonance enhanced molecular oxygen sensing by single Au-NPs@SiOx NWs under 532-nm illumination (visible light) at room temperature. Excellent selectivity of the Au-NPs@SiOx NWs to molecular oxygen in air has been demonstrated. Illumination improved the sensing properties in terms of response and fast recovery time, which can be attributed to the photogenerated hole-mediated oxygen desorption. A general strategy of light-modulated sensing, vis-{\`a} -vis dark, is demonstrated in a wide band gap single NW system that could potentially open up routes for biosensing, because silica and Au both lack biotoxicity.",

author = "Wang, {Sheng Bo} and Huang, {Yi Fan} and Surojit Chattopadhyay and Chang, {Shoou Jinn} and Chen, {Ruei San} and Chong, {Cheong Wei} and Hu, {Ming Shien} and Chen, {Li Chyong} and Chen, {Kuei Hsien}",

note = "Funding Information: This work was supported by the Ministry of Education, National Science Council, National Taiwan University, National Cheng Kung University (NCKU), National Yang-Ming University and Academia Sinica, Taiwan. Technical support was provided by the Core Facilities for Nano Science and Technology, Academia Sinica and National Taiwan University. Fruitful discussion and technical help from Dr Han Hsieh-Cheng was also appreciated.",

year = "2013",

month = may,

doi = "10.1038/am.2013.17",

language = "English",

volume = "5",

journal = "NPG Asia Materials",

issn = "1884-4049",

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AU - Wang, Sheng Bo

AU - Huang, Yi Fan

AU - Chattopadhyay, Surojit

AU - Chang, Shoou Jinn

AU - Chen, Ruei San

AU - Chong, Cheong Wei

AU - Hu, Ming Shien

AU - Chen, Li Chyong

AU - Chen, Kuei Hsien

N1 - Funding Information: This work was supported by the Ministry of Education, National Science Council, National Taiwan University, National Cheng Kung University (NCKU), National Yang-Ming University and Academia Sinica, Taiwan. Technical support was provided by the Core Facilities for Nano Science and Technology, Academia Sinica and National Taiwan University. Fruitful discussion and technical help from Dr Han Hsieh-Cheng was also appreciated.

PY - 2013/5

Y1 - 2013/5

N2 - An intriguing system featuring a wide band gap silica nanowire (SiO xNW) that absorbs visible light (532 nm) via the surface plasmons (SPs) of embedded gold nanoparticles (Au NPs) is reported for sensing applications. We report SP resonance enhanced molecular oxygen sensing by single Au-NPs@SiOx NWs under 532-nm illumination (visible light) at room temperature. Excellent selectivity of the Au-NPs@SiOx NWs to molecular oxygen in air has been demonstrated. Illumination improved the sensing properties in terms of response and fast recovery time, which can be attributed to the photogenerated hole-mediated oxygen desorption. A general strategy of light-modulated sensing, vis-à -vis dark, is demonstrated in a wide band gap single NW system that could potentially open up routes for biosensing, because silica and Au both lack biotoxicity.

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Surface plasmon-enhanced gas sensing in single gold-peapodded silica nanowires

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