Journal article

Potential-Scanning Localized Plasmon Sensing with Single and Coupled Gold Nanorods

Tokuhisa Kawawaki, Heyou Zhang, Hiroyasu Nishi, Paul Mulvaney, Tetsu Tatsuma

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | AMER CHEMICAL SOC | Published : 2017

Abstract

Single plasmonic nanoparticles can potentially serve as optical sensors for detecting local refractive index changes. However, simultaneous monitoring of the scattering spectra from multiple nanoparticles is not practical. Here we perform potential-scanning localized surface plasmon resonance (LSPR) sensing. Gold nanorods are immobilized on an ITO electrode. Instead of collecting the full spectrum, as is done in conventional LSPR sensing, the electrode potential is scanned while the rod spectra are monitored at a single wavelength. We demonstrate that refractive index changes can be determined from single wavelength experiments and we further find that gold nanorod (NR) dimers exhibit higher..

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University of Melbourne Researchers

Grants

Awarded by Japan Society for the Promotion of Science (JSPS)


Awarded by ARC Centre of Excellence in Exciton Science


Awarded by Grants-in-Aid for Scientific Research


Funding Acknowledgements

This work was supported in part by Grants-in-Aid for Scientific Research (No. JP16K14017 for TT) from the Japan Society for the Promotion of Science (JSPS). PM and HZ acknowledge support from the ARC Centre of Excellence in Exciton Science (CE170100026). T.K. thanks a JSPS Research Fellowship for Young Scientists.