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First Steps of in Situ Surface-Enhanced Raman Scattering During Shipboard Experiments

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Abstract:

It is shown that the surface-enhanced Raman scattering (SERS) technique can be applied to detect organic molecules during in situ experiments. To this purpose, we used trans-1,2-bis(4-pyridyl)ethylene (BPE) as a target molecule. Adsorbed on the SERS chemosensor surface and excited under laser, the vibration modes of the molecules can be identified. SERS chemosensors are based on quartz substrates functionalized by silanization and partially coated with gold nanoparticles. SERS measurements during shipboard experiments were made with a home-made in situ Raman spectrometer connected to a marinized micro-fluidic system. The device was designed to host chemosensors in order to ensure measurements with a flow cell. A theoretical limit of detection was estimated in the range of picomolar (pM) concentrations based on Freundlich isotherm calculations.

Keywords: CHEMOSENSORS; FLOW CELLS; FREUNDLICH ISOTHERM; IN SITU MEASUREMENTS; SERS; SHIPBOARD EXPERIMENTS; SURFACE-ENHANCED RAMAN SCATTERING

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370210792973505

Affiliations: IFREMER, Service Interfaces et Capteurs, BP 70 29280 Plouzané, France

Publication date: October 1, 2010

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