Noble metal nanocrystals are known for their unique optical and electronic properties which stem from their ability to support localized surface plasmon resonance (LSPR). These properties have made noble metal nanoparticles extremely popular for applications in sensors, imaging and spectroscopy techniques, and electronic and catalytic devices. In the past twenty years there has been an increase in the interest in the field of thermoplasmonics which focuses on harnessing the LSPR properties of nanoparticles for localized heating applications. The goal of this work was to investigate the selective thermoplasmonic excitation of different types of silver nanocube (AgNC) structures in supported monolayers via thermoplasmonic embedment. AgNCs monolayers were deposited on polystyrene thin films using Langmuir-Schaefer deposition and then subject to different intervals of laser exposure. A wavelength of 458 nm was chosen to selectively embed the individual AgNCs and a wavelength of 568 nm was chosen to selectively embed the silver nanocube clusters (AgClusters). The extent of selective embedment was determined by analyzing the topographic profiles of the different AgNCs and AgClusters in the monolayer following laser exposure. Based on the embedment patterns achieved with the respective wavelengths, it was determined that both types of selective embedment were attained. In addition to being the first reported instance of spatially resolved thermoplasmonics in supported nanoparticle monolayers, these selective embedment techniques show promise for future applications in nanopatterning.
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