Nanoengineering instrumentation to control the optical properties of plasmonic nanoparticles for thin film optics

James N. Monks; Andrew Hurst; Zengbo Wang

doi:10.1117/12.2633309

3 October 2022 Nanoengineering instrumentation to control the optical properties of plasmonic nanoparticles for thin film optics

James N. Monks, Andrew Hurst, Zengbo Wang

Author Affiliations +

Proceedings Volume 12202, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XIX; 122020F (2022) https://doi.org/10.1117/12.2633309
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

Plasmonic nanoparticles are desirable for a wide range of applications and act as the base nano-building blocks for thin film optics and optical metamaterials. The properties and applicability of plamsonic materials are considerably influenced by their size, shape, charge, and agglomeration, all of which contribute to their optical properties. There is a range of top-down and bottom-up engineering processes now available for synthesizing these nanomaterials. However, the majority of current fabrication methods are thermally based which give rise to broad particle polydispersity and require strong reducing agents. Our research has developed a new nanoengineering instrument that is capable of synthesizing plasmonic nanoparticles to a desired optical specification. This novel synthesizing method provides excellent spatial and temporal control, avoids harmful strong reducing agents, and can be synthesis at room temperature. The underlying technology functionalizes seed nanoparticles and utilizes a photochemical reaction to activate the higher order plasmon modes from a seed nanoparticle solution to finely tailor the morphology of the nanoparticles in order to provide a desired optical response. This is achieved through intramolecular α-hydrogen abstraction of arylcycloalkyl ketones through the Norrish type II reaction. The end product yields a colloidal solution with optical properties that have been tuned and tailored by pure spectral radiation. Utilizing this technology could enable a manufacturing route for optical metamaterial building blocks in a repeatable and reliable fashion that assist hierarchical assembly techniques.

Citation Download Citation

James N. Monks, Andrew Hurst, and Zengbo Wang "Nanoengineering instrumentation to control the optical properties of plasmonic nanoparticles for thin film optics", Proc. SPIE 12202, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XIX, 122020F (3 October 2022); https://doi.org/10.1117/12.2633309

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KEYWORDS

Nanoparticles

Absorption

Optical properties

Thin films

Plasmonics

Nanoengineering

Silver

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