Femtosecond Laser-Nanostructured Substrates for Surface-Enhanced Raman Scattering

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• 作者：Eric D. Diebold ; Nathan H. Mack ; Stephen K. Doorn ; Eric Mazur
• 刊名：Langmuir
• 出版年：2009
• 出版时间：February 3, 2009
• 年：2009
• 卷：25
• 期：3
• 页码：1790-1794
• 全文大小：171K
• 年卷期：v.25,no.3(February 3, 2009)
• ISSN：1520-5827

文摘

We present a new type of surface-enhanced Raman scattering (SERS) substrate that exhibits extremely large and uniform cross-section enhancements over a macroscopic (greater than 25 mm²) area. The substrates are fabricated using a femtosecond laser nanostructuring process, followed by thermal deposition of silver. SERS signals from adsorbed molecules show a spatially uniform enhancement factor of approximately 10⁷. Spectroscopic characterization of these substrates suggests their potential for use in few or single-molecule Raman spectroscopy.