Adsorption of a variety of thiol molecules has been widely used to affect the optical properties of metallic nanoparticles (MNPs) and enable new technological capabilities in applications spanning from biosensors to photonics. A fundamental understanding of the adsorption/reaction processes of thiols on the MNP surfaces and how thiol adsorption affects the MNP optical properties is critical to the technology development. In this talk we discuss 1) how nonlinear (second harmonic) light scattering can be used to probe the reaction of thiols on the surface of MNPs, 2) how thiol structure and MNP surface treatment may affect thiol reaction/adsorption, 3) how layering of different thiol molecules may affect the MNP plasmonic structure, and 4) how thiol adsorption can be used to dramatically increase the fluorescence quantum efficiency (in some cases by more than two orders of magnitude) of the MNPs.

Activation of thiols on metallic nanoparticles and its effect on the particle optical properties

248th National Meeting (2014)

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