Graphene oxide coupled with gold nanoparticles for localized surface plasmon resonance based gas sensor |
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| Affiliation: | 1. Dipartimento di Ingegneria Industriale, Università di Padova, Padova, Italy;2. Dipartimento di Scienze Fisiche e Chimiche, Università dell’Aquila Via Vetoio 10, 67100 L’Aquila, Italy;3. CNR-SPIN Uos L’Aquila, Via Vetoio 10, 67100 L’Aquila, Italy;4. School of Electrical and Computer Engineering, RMIT University, Melbourne, Australia;2. Cardiovascular Department, IRCCS Multimedica, Sesto S. Giovanni, Milan, Italy;3. Electrophisiology and Cardiac Pacing Unit, Istituto di Cura Città di Pavia, Pavia, Italy;1. Department of Chemistry, Harbin Institute of Technology, Harbin 150001, PR China;2. State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China;3. Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Ministry of Education, College of Chemistry, Jilin Normal University, Siping 136000, PR China;4. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China;1. Department of Electronic Engineering, Chang Gung University, Taoyuan 33002, Taiwan;2. Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Taoyuan 33302, Taiwan;3. Center for Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan;4. Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan;5. Research Center for Informatics, Indonesian Institute of Sciences, Bandung 40135, Indonesia;1. Department of Electrical and Electronic Engineering, Rajshahi University of Engineering & Technology, Rajshahi 6204, Bangladesh;2. Department of Electronics and Telecommunication Engineering, Rajshahi University of Engineering & Technology, Rajshahi 6204, Bangladesh;3. Department of Electrical and Electronic Engineering, Bangladesh Army University of Engineering & Technology, Bangladesh;1. Wireless and Photonic Network Research Center, Faculty of Engineering, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Communication Technology Section, University Kuala Lumpur, British Malaysia Institute, 53100 Gombak, Selangor, Malaysia;3. Department of Computer and Communications System Engineering, Faculty of Engineering, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;4. Department of Chemistry, Faculty of Science, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia |
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| Abstract: | An optical gas sensor was prepared by depositing graphene oxide flakes over a monolayer of gold nanoparticles, chemically attached to a functionalized fused silica substrate. The coupling between flakes and nanoparticles lead to optical changes upon exposure to different gases: in particular, we observed a shift of the surface plasmon resonance band in presence of both reducing and oxidizing gases. This effect can be explained in terms of a strong gold–graphene interaction and specifically of electron transfer between the gold nanoparticles and the two-dimensional sheet of the sp2-hybridized carbons of graphene oxide. |
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