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Modification of Ag nanoparticles with mixed thiols for improved SERS detection of poorly adsorbing target molecules: detection of MDMA

2011; Royal Society of Chemistry; Volume: 47; Issue: 15 Linguagem: Inglês

10.1039/c0cc05312k

1364-548X

A. W. Stewart, Steven E. J. Bell,

Biosensors and Analytical Detection

Here we report an example of a mixed thiol monolayer on the surface of Ag nanoparticles which promotes adsorption and quantitative SERS detection of 3,4-methylenedioxymethamphetamine (MDMA, "Ecstasy"); the thiols in the mixed monolayers act synergistically since MDMA does not adsorb onto colloids modified with either of the thiols separately.