title: Design of Hybrid Nanostructural Arrays to Manipulate SERS-Active Substrates by Nanosphere Lithography.
abstract: An easy-handling and low-cost method is utilized to controllably fabricate nanopattern arrays as the surface-enhanced Raman scattering (SERS) active substrates with high density of SERS-active areas (hot spots). A hybrid silver array of nanocaps and nanotriangles are prepared by combining magnetron sputtering and plasma etching. By adjusting the etching time of polystyrene (PS) colloid spheres array in silver nanobowls, the morphology of the arrays can be easily manipulated to control the formation and distribution of hot spots. The experimental results show that the hybrid nanostructural arrays have large enhancement factor, which is estimated to be seven times larger than that in the array of nanocaps and three times larger than that in the array of nanorings and nanoparticles. According to the results of finite-difference time-domain simulation, the excellent SERS performance of this array is ascribed to the high density of hot spots and enhanced electromagnetic field.
authors.forename: Xiaoyu
authors.identifier: http://orcid.org/0000-0002-4006-6296
authors.initials: X
authors.lastname: Zhao
authors.forename: Jiahong
authors.initials: J
authors.lastname: Wen
authors.affiliation: Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University , Ministry of Education, Siping 136000, PR China.
authors.forename: Mengning
authors.initials: M
authors.lastname: Zhang
authors.forename: Dunhui
authors.initials: D
authors.lastname: Wang
authors.affiliation: Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University , Ministry of Education, Siping 136000, PR China.
authors.forename: Yaxin
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University , Ministry of Education, Siping 136000, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.affiliation: Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University , Ministry of Education, Siping 136000, PR China.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Functional Materials Physics and Chemistry, Jilin Normal University , Ministry of Education, Siping 136000, PR China.|Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences , Changchun 130033, PR China.
authors.forename: Jinghai
authors.initials: J
authors.lastname: Yang
authors.forename: Youwei
authors.initials: Y
authors.lastname: Du
keywords: hot spots; nanosphere lithography (NSL); nanostructrual arrays; silver film; surface-enhanced Raman scattering (SERS)