Friday, July 18, 2014

A metal-dielectric-graphene sandwich for surface enhanced Raman spectroscopy




Nanoscale , 2014, Advance Article

DOI: 10.1039/C4NR02301C, Communication

Xuechao Yu, Jin Tao, Youde Shen, Guozhen Liang, Tao Liu, Yongzhe Zhang, Qi Jie Wang

The Raman intensity of Rhodamine B (RhB) is enhanced by inserting a thin high [small kappa] dielectric layer which reduces the surface plasmon damping at the gold-graphene interface. The results indicate that the Raman intensity increases sharply by plasmonic resonance enhancement while maintaining efficient fluorescence quenching with optimized dielectric layer thickness.

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