Wednesday, June 25, 2014

Gold nanostar substrates for SERS-based chemical sensing in the femtomolar regime




Nanoscale , 2014, Advance Article

DOI: 10.1039/C4NR02513J, Paper

A. S. D. S. Indrasekara, S. Meyers, S. Shubeita, L. C. Feldman, T. Gustafsson, L. Fabris

A SERS sensor based on gold nanostars is described. The size and sharpness of the nanostar spikes are tuned to maximize sensitivity and SERS enhancement, yielding a detection limit of 10-15 M and an enhancement factor of 109 . The effectiveness of the sensor is proven for both chemisorbed and physisorbed analytes under non-resonant conditions and its multiplexing capability is demonstrated.

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