Chemically Tuning the Localized Surface Plasmon Resonances of Gold Nanostructure Arrays

Type
Article

Authors
Zheng, Yue Bing
Jensen, Linlin
Yan, Wei
Walker, Thomas R.
Juluri, Bala Krishna
Jensen, Lasse
Huang, Tony Jun

Online Publication Date
2009-04-06

Print Publication Date
2009-04-30

Date
2009-04-06

Abstract
We report on chemical etching of ordered Au nanostructure arrays to continuously tune their localized surface plasmon resonances (LSPR). Real-time extinction spectra were recorded from both Au nanodisks and nanospheres immobilized on glass substrates when immersed in Au etchant. The time-dependent LSPR frequencies, intensities, and bandwidths were studied theoretically with discrete dipole approximations and the Mie solution, and they were correlated with the evolution of the etched Au nanostructures' morphology (as examined by atomic force microscopy). Since this chemical etching method can conveniently and accurately tune LSPR, it offers precise control of plasmonic properties and can be useful in applications such as surfaceenhanced Raman spectroscopy and molecular resonance spectroscopy. © 2009 American Chemical Society.

Citation
Zheng YB, Jensen L, Yan W, Walker TR, Juluri BK, et al. (2009) Chemically Tuning the Localized Surface Plasmon Resonances of Gold Nanostructure Arrays. The Journal of Physical Chemistry C 113: 7019–7024. Available: http://dx.doi.org/10.1021/jp8106606.

Acknowledgements
This research was supported by the Air Force Office of Scientific Research (FA9550-08-1-0349), the National Science Foundation (ECCS-0801922 and ECCS-0609128), and the Penn State Center for Nanoscale Science (MRSEC). Y.B.Z. acknowledges the Founder's Prize and Grant of the American Academy of Mechanics from the Robert M. and Mary Haythornthwaite Foundation and the KAUST Scholarship. Components of this work were conducted at the Pennsylvania State University node of the NSF-funded National Nanotechnology Infrastructure Network.

Publisher
American Chemical Society (ACS)

Journal
The Journal of Physical Chemistry C

DOI
10.1021/jp8106606

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