Journal article

Effects of Hydrostatic Pressure on the Surface Plasmon Resonance of Gold Nanocrystals

Camino Martin-Sanchez, Jose Antonio Barreda-Argueso, Susanne Seibt, Paul Mulvaney, Fernando Rodriguez

ACS NANO | AMER CHEMICAL SOC | Published : 2019

Abstract

The surface plasmon resonances of gold nanospheres and nanorods have been measured as a function of hydrostatic pressure up to 17 GPa in methanol-ethanol 4:1 solvent and up to 10 GPa in paraffin. Both the sphere resonance and the longitudinal rod resonance exhibit redshifts, whereas the transverse rod mode shows an extremely weak redshift or blueshift depending on the nanorod aspect ratio. Solidification of the solvent around 11 GPa causes some aggregation of the particles, readily identified through broadening of the surface plasmon band and further redshifting. Spectra collected during loading and unloading cycles exhibit only minimal hysteresis if the pressure remains below 11 GPa. The su..

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Grants

Awarded by MINECO/FEDER


Awarded by MALTA TEAM/MINECO


Awarded by Australian Research Council


Funding Acknowledgements

Financial support from Projects MAT2015-69508-P (MINECO/FEDER) and MAT2015-71070-REDC (MALTA TEAM/MINECO) is acknowledged. Fruitful discussions with L. M. Liz-Marzan are acknowledged. P.M. and S.S. acknowledge support from the Australian Research Council through Grant CE170100026.