Surface enhance Raman scattering (SERS) spectroscopy is a powerful ultrasensitive technique which allows detection down to single molecule levels. The production of SERS substrates is based on the generation of hot spots created by plasmonic nanoparticles. However, the controlled formation of these hot spots over large areas is still a challenge in order to produce homogeneous and reproducible SERS intensities over large areas.We report novel methods to produce highly organized structures made of plasmonic nanoparticles in a macro-scale range using a completely lithography-free approach. Monolayers, supercrystals, and tuneable periodic linear arrays, were created via spin coating, confinement controlled drying, and their combinations. These structures, were effectively use for sensing using SERS showing very good reproducibility among big areas. This fact, make them perfect candidates as ultrasensitive substrates for SERS due to the controlled formation of hot spots. Which provide high and uniform SERS enhancement over extended areas. References [1] Pazos-Perez,N ., Alvarez-Puebla, R. A., and Fery, A., et al. Soft Matter , 9, 4093, 2011 .[2]Pazos-Perez, N. ; Ni, W.; Schweikart, A., et al. Chemical Science , 1, 174, 2010 .[3] Pazos-Perez, N. ; de Abajo, F. J. G.; Fery. A.; Alvarez-Puebla, R. Langmuir , 28, 8909, 2012 .

Highly organized plasmonic structures for SERS sensing

245th National Meeting (2013)

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