Ultraviolet Nanoplasmonics: A Demonstration of Surface-Enhanced Raman Spectroscopy, Fluorescence, and Photodegradation Using Gallium Nanoparticles

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• 作者：Yang Yang ; John M. Callahan ; Tong-Ho Kim ; April S. Brown ; Henry O. Everitt
• 刊名：Nano Letters
• 出版年：2013
• 出版时间：June 12, 2013
• 年：2013
• 卷：13
• 期：6
• 页码：2837-2841
• 全文大小：331K
• 年卷期：v.13,no.6(June 12, 2013)
• ISSN：1530-6992

文摘

Self-assembled arrays of hemispherical gallium nanoparticles deposited by molecular beam epitaxy on a sapphire support are explored as a new type of substrate for ultraviolet plasmonics. Spin-casting a 5 nm film of crystal violet upon these nanoparticles permitted the demonstration of surface-enhanced Raman spectra, fluorescence, and degradation following excitation by a HeCd laser operating at 325 nm. Measured local Raman enhancement factors exceeding 10⁷ demonstrate the potential of gallium nanoparticle arrays for plasmonically enhanced ultraviolet detection and remediation.

Keywords:

Ultraviolet; plasmonics; gallium; nanoparticles; surface-enhanced Raman; surface-enhanced fluorescence