期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 113, 期 17, 页码 7019-7024出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp8106606
关键词
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资金
- Air Force Office of Scientific Research [FA9550-08-1-0349]
- National Science Foundation [ECCS-0801922, ECCS-0609128]
- Penn State Center for Nanoscale Science (MRSEC)
- Robert M. and Mary Haythornthwaite Foundation
- KAUST Scholarship
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [820404] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0801922] Funding Source: National Science Foundation
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 surface-enhanced Raman spectroscopy and molecular resonance spectroscopy.
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