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Provedor de dados:  ArchiMer
País:  France
Título:  Detection of polycyclic aromatic hydrocarbon (PAH) compounds in artificial sea-water using surface-enhanced Raman scattering (SERS)
Autores:  Peron, Olivier
Rinnert, Emmanuel
Lehaitre, Michel
Crassous, Philippe
Compere, Chantal
Data:  2009-07
Ano:  2009
Palavras-chave:  Sensor
Sea water
PAH detection
Gold nanoparticles
Resumo:  This paper reports an accurate synthesis of surface-enhanced Raman scattering (SERS) active substrates, based on gold colloidal monolayer, suitable for in situ environmental analysis. Quartz substrates were functionalized by silanization with (3-mercaptopropyl)trimethoxysilane (MPMS) or (3-aminopropyl)trimethoxysilane (APTMS) and they subsequently reacted with colloidal suspension of gold metal nanoparticles: respectively, the functional groups SH and NH2 bound gold nanoparticles. Gold nanoparticles were prepared by the chemical reduction of HAuCl4 using sodium tricitrate and immobilized onto silanized quartz substrates. Active substrate surface morphology was characterized with scanning electron microscopy (SEM) measurements and gold nanoparticles presented a diameter in the range 40-100 nm. Colloidal hydrophobic films. allowing nonpolar molecule pre-concentration, were obtained. The surfaces exhibit strong enhancement of Raman scattering from molecules adsorbed on the films. Spectra were recorded for two PAHs, naphthalene and pyrene, in artificial sea-water (ASW) with limits of detection (LODs) of 10 ppb for both oil MPMS silanized substrates. (C) 2009 Elsevier B.V. All rights reserved.
Tipo:  Text
Idioma:  Inglês

Editor:  Elsevier
Formato:  application/pdf
Fonte:  Talanta (0039-9140) (Elsevier), 2009-07 , Vol. 79 , N. 2 , P. 199-204
Direitos:  2009 Elsevier Ltd All rights reserved.

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