Capillary interactions for fabrication of non-coalescent liquid-metallic nanospheres enabling tuneable gap-plasmon-based mechanochromic sensors

Renu Raman Sahu; Alwar Samy Ramasamy; Tapajyoti Das Gupta

doi:10.1117/12.3016797

10 June 2024 Capillary interactions for fabrication of non-coalescent liquid-metallic nanospheres enabling tuneable gap-plasmon-based mechanochromic sensors

Renu Raman Sahu, Alwar Samy Ramasamy, Tapajyoti Das Gupta

Author Affiliations +

Proceedings Volume 12991, Nanophotonics X; 129910L (2024) https://doi.org/10.1117/12.3016797
Event: SPIE Photonics Europe, 2024, Strasbourg, France

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.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Renu Raman Sahu, Alwar Samy Ramasamy, and Tapajyoti Das Gupta "Capillary interactions for fabrication of non-coalescent liquid-metallic nanospheres enabling tuneable gap-plasmon-based mechanochromic sensors", Proc. SPIE 12991, Nanophotonics X, 129910L (10 June 2024); https://doi.org/10.1117/12.3016797

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