title: Surface enhanced Raman scattering substrate with metallic nanogap array fabricated by etching the assembled polystyrene spheres array.
abstract: A sensitive surface enhanced Raman scattering (SERS) substrate with metallic nanogap array (MNGA) is fabricated by etching of an assembled polystyrene (PS) spheres array, followed by the coating of a metal film. The substrate is reproducible in fabrication and sensitive due to the nanogap coupling resonance (NGCR) enhancement. The NGCR is analyzed with the finite difference time domain (FDTD) method, and the relationship between the gap parameter and the field enhancement is obtained. Experimental measurements of R6G on demonstrate that the enhancement factor (EF) of the MNGA SERS substrate is increased by more than two fold compared with the control sample.
authors.affiliation: Chongqing institute of green and intelligent technology, Chinese Academy of Sciences, Chongqing, 401122, China.
authors.forename: Liangping
authors.initials: L
authors.lastname: Xia
authors.forename: Zheng
authors.initials: Z
authors.lastname: Yang
authors.forename: Shaoyun
authors.initials: S
authors.lastname: Yin
authors.forename: Wenrui
authors.initials: W
authors.lastname: Guo
authors.forename: Shuhong
authors.initials: S
authors.lastname: Li
authors.forename: Wanyi
authors.initials: W
authors.lastname: Xie
authors.forename: Deping
authors.initials: D
authors.lastname: Huang
authors.forename: Qiling
authors.initials: Q
authors.lastname: Deng
authors.forename: Haofei
authors.initials: H
authors.lastname: Shi
authors.forename: Hongliang
authors.initials: H
authors.lastname: Cui
authors.forename: Chunlei
authors.initials: C
authors.lastname: Du
mesh_terms: D008027:Light; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D008863:Microspheres; D011137:Polystyrenes / Q000737:chemistry* / Q000528:radiation effects; D012542:Scattering, Radiation; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties
chemical_list: D011137:Polystyrenes