title: Two-dimensional ultrathin gold film composed of steadily linked dense nanoparticle with surface plasmon resonance.
abstract: BACKGROUND
  Noble metallic nanoparticles have prominent optical local-field enhancement and light trapping properties in the visible light region resulting from surface plasmon resonances.
  
  
  RESULTS
  We investigate the optical spectral properties and the surface-enhanced Raman spectroscopy of two-dimensional distinctive continuous ultrathin gold nanofilms. Experimental results show that the one- or two-layer nanofilm obviously increases absorbance in PEDOT:PSS and P3HT:PCBM layers and the gold nanofilm acquires high Raman-enhancing capability.
  
  
  CONCLUSIONS
  The fabricated novel structure of the continuous ultrathin gold nanofilms possesses high surface plasmon resonance properties and boasts a high surface-enhanced Raman scattering (SERS) enhancement factor, which can be a robust and cost-efficient SERS substrate. Interestingly, owing to the distinctive morphology and high light transmittance, the peculiar nanofilm can be used in multilayer photovoltaic devices to trap light without affecting the physical thickness of solar photovoltaic absorber layers and yielding new options for solar cell design.
authors.affiliation: School of Electronic Science and Engineering and Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, Southeast University, Nanjing, 210096, People's Republic of China. tzhang@seu.edu.cn.
authors.forename: Long-De
authors.initials: LD
authors.lastname: Wang
authors.forename: Tong
authors.initials: T
authors.lastname: Zhang
authors.forename: Sheng-Qing
authors.initials: SQ
authors.lastname: Zhu
authors.forename: Xiao-Yang
authors.initials: XY
authors.lastname: Zhang
authors.forename: Qi-Long
authors.initials: QL
authors.lastname: Wang
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Liu
authors.forename: Ruo-Zhou
authors.initials: RZ
authors.lastname: Li