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