title: Controlled assembly of highly Raman-enhancing silver nanocap arrays templated by porous anodic alumina membranes.
abstract: A convenient nanoscale technique is reported for the fabrication of highly ordered hemispherical silver nanocap arrays templated by porous anodic alumina (PAA) membranes as robust and cost-efficient surface-enhanced Raman scattering (SERS) substrates. This geometry produces a high Raman signal due to its periodic hexagonal arrangements and control of the gap between the nanostructures in the sub-10-nm regime. The surface structure can be tuned further to optimize the enhancement factor according to optional PAA fabrication and silver deposition parameters. Finite-difference time-domain calculations indicate that the structure may possess excellent SERS characteristics due to the high density and abundance of hot spots.
authors: Department of Physics, Southeast University, Nanjing 211189, PR China. tqiu@seu.edu.cn
authors: Teng
authors: T
authors: Qiu
authors: Wenjun
authors: W
authors: Zhang
authors: Xianzhong
authors: X
authors: Lang
authors: Yongjin
authors: Y
authors: Zhou
authors: Tiejun
authors: T
authors: Cui
authors: Paul K
authors: PK
authors: Chu
mesh_terms: D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*
chemical_list: D012834:Silver