Nanoparticles have a wide variety of possible applications due to their unique chemical and physical properties. Specifically, plasmonic gold microbars can be used in optical applications such as optical trapping experiments and optical circuitry. Herein, we present a study of a two-step seed mediated growth method with the goal to investigate how to further increase anisotropic particle yields using data from seeded synthesis procedures previously completed using a Cu2+ metal additive reaction in the presence of the surfactants polyvinylpyrrolidone and sodium dodecyl sulfonate. For the gold microbars, synthesis was performed with three different copper seed stock concentrations (100 µL, 150 µL, and 200 µL) and subsequently tested with varying volumes of these concentrations in place of the organic gold (III) solution after the seeds were collected using a 250 nm filter. Bright field microscope and scanning electron microscope images were taken of the microbars. The results of this study indicated that the seed mediated growth reactions affected the length and width of the gold microbar measurements and its yield. Details of the synthesis procedures and an analysis of the resulting microbars of this ongoing experiment will be presented.

Optimized seed mediated growth of gold microbars

ACS Spring Meeting 2021

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