Data/hora: 02/06/2024 00:46:37

Provedor de dados: | 5
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; SERS; Silanization; 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

Identificador:

http://archimer.ifremer.fr/doc/2009/publication-6616.pdf

DOI:10.1016/j.talanta.2009.03.043

Editor: | Elsevier
Relação: | http://archimer.ifremer.fr/doc/00000/6616/
Formato: | application/pdf
Fonte: | Talanta (0039-9140) (Elsevier), 2009-07 , Vol. 79 , N. 2 , P. 199-204
Fonte: | 2009 Elsevier Ltd All rights reserved.