Journal article

UV plasmonic properties of colloidal liquid-metal eutectic gallium-indium alloy nanoparticles

Philipp Reineck, Yiliang Lin, Brant C Gibson, Michael D Dickey, Andrew D Greentree, Ivan S Maksymov



Nanoparticles made of non-noble metals such as gallium have recently attracted significant attention due to promising applications in UV plasmonics. To date, experiments have mostly focused on solid and liquid pure gallium particles immobilized on solid substrates. However, for many applications, colloidal liquid-metal nanoparticle solutions are vital. Here, we experimentally demonstrate strong UV plasmonic resonances of eutectic gallium-indium (EGaIn) liquid-metal alloy nanoparticles suspended in ethanol. We rationalise experimental results through a theoretical model based on Mie theory. Our results contribute to the understanding of UV plasmon resonances in colloidal liquid-metal EGaIn na..

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Awarded by Australian Research Council (ARC)

Awarded by National Science Foundation through the Research Triangle MRSEC

Awarded by National Science Foundation

Funding Acknowledgements

This work was supported by Australian Research Council (ARC) through its Centre of Excellence for Nanoscale BioPhotonics (CE140100003), LIEF program (LE160100051) and Future Fellowship (FT160100357, FT180100343). This research was undertaken on the NCI National Facility in Canberra, Australia, which is supported by the Australian Commonwealth Government. P.R. acknowledges funding through the RMIT Vice Chancellor's Research Fellowship. The authors acknowledge the support of the Ian Potter Foundation in establishing the Ian Potter NanoBioSensing Facility at RMIT University, where the UV-Vis absorption spectroscopy was carried out. Y.L. and M.D.D. acknowledge funding from the National Science Foundation through the Research Triangle MRSEC (DMR-1121107). The authors acknowledge use of the Analytical Instrumentation Facility (AIF) at North Carolina State University, which is supported by the State of North Carolina and the National Science Foundation (award number ECCS-1542015).