Volume 210, 2018

Quantifying photothermal heating at plasmonic nanoparticles by scanning electrochemical microscopy

Abstract

Photothermal heating at metal nanoparticles results from the non-radiative decay of localized surface plasmons. The local heat generation enhances the mass transport rate of redox molecules and causes a shift in their formal potential, both of which can impact an electrochemical process at the nanoparticle interface. Here we present a methodology for probing the surface temperature at a plasmonic nanoparticle substrate using scanning electrochemical microscopy (SECM). Light is used to excite a plasmonic substrate electrode, while an ultramicroelectrode tip is positioned close to the substrate to read out both the mass transfer rate and concentration profile of the redox molecules. The measured mass transfer rate and the shift in the equilibrium potential provide a quantitative value of the temperature increase at the substrate surface, which is verified by simulations using a mass transfer model coupled with heat dissipation. The developed SECM approach is suitable for probing heat generation at a variety of both plasmonic and non-plasmonic nanostructures.

Graphical abstract: Quantifying photothermal heating at plasmonic nanoparticles by scanning electrochemical microscopy

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
05 มี.ค. 2561
Accepted
12 มี.ค. 2561
First published
12 มี.ค. 2561

Faraday Discuss., 2018,210, 29-39

Author version available

Quantifying photothermal heating at plasmonic nanoparticles by scanning electrochemical microscopy

Y. Yu, J. D. Williams and K. A. Willets, Faraday Discuss., 2018, 210, 29 DOI: 10.1039/C8FD00057C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements