Optimization of Nanopost Plasmonic Crystals for Surface Enhanced Raman Scattering

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• 作者：Alfred J. Baca ; Jason M. Montgomery ; Lee R. Cambrea ; Mark Moran ; Linda Johnson ; Jeanine Yacoub ; Tu T. Truong
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：April 21, 2011
• 年：2011
• 卷：115
• 期：15
• 页码：7171-7178
• 全文大小：970K
• 年卷期：v.115,no.15(April 21, 2011)
• ISSN：1932-7455

文摘

We present experimental and theoretical studies of a type of Surface Enhanced Raman Scattering (SERS) substrate composed of a metal coated square array of nanopost structures formed via soft nanoimprinting. These SERS substrates exhibit higher SERS intensities in comparison to those obtained with the corresponding square array of nanowell structures with similar spatial layouts and demonstrate multiple analyte detection using SERS. Three-dimensional finite-difference time-domain (3D FDTD) simulations qualitatively capture the key features of these systems and suggest a route to the fabrication of optimized, highly efficient SERS substrates in silico. Collectively, the ease of fabrication, high sensitivities, and predictable responses suggest an attractive route to SERS substrates for portable chemical warfare agent detection, environmental monitors, and other applications.