Journal
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS
Volume 46, Issue 41-44, Pages L1080-L1082Publisher
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/JJAP.46.L1080
Keywords
surface-enhanced Raman scattering; silver oxide; molecular sensor; nanoparticle; plasmon
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By using a focused laser beam, a silver-oxide thin film can be transformed into silver nanoparticles: these form an attractive material for surface-enhanced Raman scattering (SERS). The shape of the nanoparticles was shown to be controllable through changing the thickness of the film, and optimization of the film thickness maximizes the SERS efficiency. A rigorous simulation of optical absorption by Ag nanoparticles proved that the shape of the nanoparticles is tuned to support plasmon resonance at the excitation wavelength used in SERS experiments. The formation of silver nanoparticles is an excellent approach for obtaining cheap, reliable, and efficient SERS substrates.
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