| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7854516 | Carbon | 2014 | 8 Pages |
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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Energy (General)
Authors
Michela Cittadini, Marco Bersani, Francesco Perrozzi, Luca Ottaviano, Wojtek Wlodarski, Alessandro Martucci,