Graphene oxide (GO) is regarded as a promising multifunctional building block for the fabrication of GO-metal nanocomposites with enhanced Surface Enhanced Raman Spectroscopy (SERS) activity. Herein we propose the preparation of a well-controlled silver nanocubes (AgNCs) layer covered by a uniform graphene oxide coating as an effective bi-layered substrate for SERS applications. Monodisperse AgNCs were synthesized and a 2D layer of these particles was fabricated by the Langmuir-Blodgett (LB) technique. Adsorption of GO sheets onto AgNCs film was monitored through a Quartz Crystal Microbalance (QCM) experiment until a complete coverage of the nanocube monolayer was achieved. The observed GO membrane-like behaviour can improve the sticking properties of GO toward many bio-molecular species that are still challenging in their SERS detection. SERS experiments were carried out to test the SERS activity of the supported GO/AgNCs platform. A greater reproducibility of the measurements and a higher SERS enhancement factor was observed for GO/AgNCs with respect to naked AgNCs systems.

Graphene oxide/silver nanocube composites for SERS detection of biomolecules / Banchelli, Martina; Tiribilli, Bruno; Pini, Roberto; Matteini, Paolo; Caminati, Gabriella. - STAMPA. - (2015), pp. 1-3. [10.1109/BioPhotonics.2015.7304046]

Graphene oxide/silver nanocube composites for SERS detection of biomolecules

BANCHELLI, MARTINA;PINI, ROBERTO;MATTEINI, PAOLO;CAMINATI, GABRIELLA
2015

Abstract

Graphene oxide (GO) is regarded as a promising multifunctional building block for the fabrication of GO-metal nanocomposites with enhanced Surface Enhanced Raman Spectroscopy (SERS) activity. Herein we propose the preparation of a well-controlled silver nanocubes (AgNCs) layer covered by a uniform graphene oxide coating as an effective bi-layered substrate for SERS applications. Monodisperse AgNCs were synthesized and a 2D layer of these particles was fabricated by the Langmuir-Blodgett (LB) technique. Adsorption of GO sheets onto AgNCs film was monitored through a Quartz Crystal Microbalance (QCM) experiment until a complete coverage of the nanocube monolayer was achieved. The observed GO membrane-like behaviour can improve the sticking properties of GO toward many bio-molecular species that are still challenging in their SERS detection. SERS experiments were carried out to test the SERS activity of the supported GO/AgNCs platform. A greater reproducibility of the measurements and a higher SERS enhancement factor was observed for GO/AgNCs with respect to naked AgNCs systems.
2015
978-146737926-7
3rd IEEE International Conference on BioPhotonics, BioPhotonics 2015
1
3
Banchelli, Martina; Tiribilli, Bruno; Pini, Roberto; Matteini, Paolo; Caminati, Gabriella
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1066907
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