Adsorption of functionalised thiols on gold surfaces: How to build a sensitive and selective sensor for a nitroaromatic compound?

Adsorption of thiols of varying structures bearing amine, acid or aromatic functionalities was characterised by Polarisation Modulation Infrared Absorption Spectroscopy (PM-IRRAS). The so functionalised surfaces were then submitted to atmospheres containing traces of 2,4-dinitrotrifluoromethoxybenze...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2006-03, Vol.114 (1), p.223-228
Main Authors: Thery-Merland, F., Méthivier, C., Pasquinet, E., Hairault, L., Pradier, C.M.
Format: Article
Language:English
Subjects:
Chemical Sciences
Chemical sensor
Gold surfaces
Material chemistry
PM-IRRAS
QCM
Thiols
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Summary:Adsorption of thiols of varying structures bearing amine, acid or aromatic functionalities was characterised by Polarisation Modulation Infrared Absorption Spectroscopy (PM-IRRAS). The so functionalised surfaces were then submitted to atmospheres containing traces of 2,4-dinitrotrifluoromethoxybenzene and gas capture was evaluated by Quartz Crystal Microbalance (QCM). The selectivity of these new sensors was also evaluated thanks to exposures to solvents: ethanol, methylethylketone, toluene and dichloromethane. The QCM response appeared to be the best one, high and specific to the nitroaromatic, for aromatic amine functions.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2005.04.040