Water-Based Assembly and Purification of Plasmon-Coupled Gold Nanoparticle Dimers and Trimers

Abstract EN

We describe a simple one-pot water-based scheme to produce gold nanoparticle groupings with short interparticle spacings.

This approach combines a cross-linking molecule and a hydrophilic passivation layer to control the level of induced aggregation.

Suspensions of dimers and trimers are readily obtained using a single electrophoretic purification step.

The final interparticle spacings allow efficient coupling of the particle plasmon modes as verified in extinction spectroscopy.