Please use this identifier to cite or link to this item: https://doi.org/10.1021/nl404304h
Title: Probing silver deposition on single gold nanorods by their acoustic vibrations
Authors: Yu, K.
Sader, J.E.
Zijlstra, P.
Hong, M. 
Xu, Q.-H. 
Orrit, M.
Keywords: acoustic oscillations
core-shell nanoparticles
damping
Gold nanoparticles
mass sensor
single particle
Issue Date: 12-Feb-2014
Citation: Yu, K., Sader, J.E., Zijlstra, P., Hong, M., Xu, Q.-H., Orrit, M. (2014-02-12). Probing silver deposition on single gold nanorods by their acoustic vibrations. Nano Letters 14 (2) : 915-922. ScholarBank@NUS Repository. https://doi.org/10.1021/nl404304h
Abstract: Acoustic vibrations of single gold nanorods coated with silver were investigated. We used single-particle pump-probe spectroscopy to monitor the silver deposition through the particle vibrations. Two vibration modes, the breathing mode and extensional mode, are observed, and the vibrational frequencies are measured as functions of the amount of silver deposited on single gold nanorods. The breathing mode frequency was found to decrease with silver deposition, while the extensional mode frequency was almost constant for silver shells up to 6 nm. The frequency changes agree with a model based on continuum mechanics and on the assumption of a uniform silver coating. The quality factors for the breathing mode and the extensional mode are hardly affected by silver deposition, indicating that the introduced interface between gold and silver contributes negligibly to the damping of the particle vibrations. Finally, we demonstrated that an atomic layer of silver can be detected using the particle acoustic vibrations. © 2014 American Chemical Society.
Source Title: Nano Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/82931
ISSN: 15306984
DOI: 10.1021/nl404304h
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