In this paper graphene over SiO2/Si substrate was used as a substrate to fabricate SERS device. A thin film was deposited over graphene and annealed at 250°C. The substrate was examined after chemisorption of two molecules; rhodamine 6G which is a fluorescent dye, and 3-mercaptobenzoic acid, a thiol molecule. SERS enhancement factor for the proposed device is estimated to be 2.1 × 106 with respect to the flat silver substrate deposited over Si. The experimental results were compared in two ways; a) by using electromagnetic field calculation and b) quantum mechanical calculation derived from density function theory. The experimental findings were consistent with the theoretical observations.

Graphene: A building foundation for efficient plasmonic sers device. Biochem / G. Das, M. Moretti, B. Torre, M. Allione, A. Giugni, E. Di Fabrizio. - In: BIOCHEMISTRY & ANALYTICAL BIOCHEMISTRY. - ISSN 2161-1009. - 6:01(2017 Mar 06), pp. 1-6. [10.4172/2161-1009.1000310]

Graphene: A building foundation for efficient plasmonic sers device. Biochem

A. Giugni;
2017

Abstract

In this paper graphene over SiO2/Si substrate was used as a substrate to fabricate SERS device. A thin film was deposited over graphene and annealed at 250°C. The substrate was examined after chemisorption of two molecules; rhodamine 6G which is a fluorescent dye, and 3-mercaptobenzoic acid, a thiol molecule. SERS enhancement factor for the proposed device is estimated to be 2.1 × 106 with respect to the flat silver substrate deposited over Si. The experimental results were compared in two ways; a) by using electromagnetic field calculation and b) quantum mechanical calculation derived from density function theory. The experimental findings were consistent with the theoretical observations.
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/824349
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