Capillary Interactions for Fabrication of Non-coalescent Liquid-metallic Nanospheres enabling Tuneable Gap-Plasmon based Mechanochromic Sensors

Sahu, RR and Ramasamy, AS and Gupta, TD (2024) Capillary Interactions for Fabrication of Non-coalescent Liquid-metallic Nanospheres enabling Tuneable Gap-Plasmon based Mechanochromic Sensors. In: Nanophotonics X 2024, 7 April 2024through 12 April 2024, Strasbourg.

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Abstract

Gallium is a well-suited material for fabricating flexible photonic devices due to its fluidic and metallic properties. Localized Plasmonic resonance relies on fabricating metallic structures at the nanoscale with an extremely small gap between them, thus employing lithography or self-assembly techniques involving multiple reagents and process steps. In this work, we demonstrate a single-step and scalable fabrication of non-coalescent Ga Nanospheres on a biocompatible elastomeric substrate, Polydimethylsiloxane (PDMS), by exploiting the capillary interactions between liquid Ga and the uncured oligomers of PDMS. This approach enables the fabrication of multiple structural colors and mechanochromic sensors in a single deposition, owing to the active role played by PDMS in determining Ga nanostructures. © 2024 SPIE.

Item Type:	Conference Paper
Publication:	Proceedings of SPIE - The International Society for Optical Engineering
Publisher:	SPIE
Additional Information:	The copyright for this article belongs to SPIE.
Keywords:	Biocompatibility; Fabrication; Gallium; Microchannels; Nanospheres; Photonic devices; Plasmonics; Self assembly; Silicones; Substrates, Capillary interactions; Flexible photonics; Gallium nanodroplet; Gap plasmon; Mechanochromic; Metallic nanospheres; Metallic properties; Nano-droplets; Photonics devices; Plasmonics, Polydimethylsiloxane
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	21 Dec 2024 04:27
Last Modified:	21 Dec 2024 04:27
URI:	http://eprints.iisc.ac.in/id/eprint/85935

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