Deterministic integration of metal nanoparticles (NPs) onto solid substrates is a crucial requirement for creating a host of functional nanodevices with unique plasmonic, catalytic, and optoelectronic features. The use of colloidal NPs is highly attractive for this endeavor and much more favored in comparison to top-down methods, as colloids are widely recognized to possess inherently superior physicochemical properties than their lithographic counterparts. We herein introduce template dissolution interfacial patterning, a technique developed to selectively assemble single Au NPs using capillary forces and accurately print the assembled NP arrays onto various conductive and dielectric surfaces. The template dissolution strategy enables NPs to be printed without any adhesion layer which, in turn, grants direct access to the interface between the Au NP and the surface of interest. Dark-field spectroscopy is employed to optically characterize single NPs whose plasmon resonance can be easily tailored throughout the visible spectrum by varying the target substrate. The versatile applicability of the technique is demonstrated by creating nanoelectrodes for electrochemical measurements and single nanoparticle-on-mirror configurations for surface-enhanced Raman spectroscopy (SERS).

Single colloidal gold nanoparticle arrays <i>via</i> template dissolution interfacial patterning

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Single colloidal gold nanoparticle arrays via template dissolution interfacial patterning