Improved SERS performance from Au nanopillar arrays by abridging the pillar tip spacing by Ag sputtering.
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.
Huang
Zhulin
Z
Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, PR China.
Meng
Guowen
G
Huang
Qing
Q
Yang
Yajun
Y
Zhu
Chuhong
C
Tang
Chaolong
C
D000537:Aluminum Oxide / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D011078:Polychlorinated Biphenyls / Q000032:analysis; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*
D012834:Silver; D006046:Gold; D011078:Polychlorinated Biphenyls; D000537:Aluminum Oxide