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Improved SERS performance from Au nanopillar arrays by abridging the pillar tip spacing by Ag sputtering
Zhulin Huang1, Guowen Meng, Qing Huang
1Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, PR China.
Abstract:
Ag-capped Au nanopillar arrays on a resin supporter (see left upper figure), with a typical adjacent pillar tip gap of 10 nm, show obviously higher surface-enhanced Raman scattering (SERS) sensitivity (right column in red) than that of the bare Au nanopillar array while using 10 nM R6G as probe molecules. The large-area Ag-capped Au nanopillar array has potential in trace detection of special chemicals.
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