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Open Access Nano Express

Two-dimensional ultrathin gold film composed of steadily linked dense nanoparticle with surface plasmon resonance

Long-De Wang124, Tong Zhang12*, Sheng-Qing Zhu12, Xiao-Yang Zhang12, Qi-Long Wang1, Xuefeng Liu3 and Ruo-Zhou Li12

Author affiliations

1 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

2 Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute of Southeast University, Suzhou, 215123, People’s Republic of China

3 Institute of Optics and Electronics, CAS, PO Box 350, Shuangliu, Chengdu, 610209, China

4 Department of Chemistry and Chemical Engineering, Huainan Normal University, Huainan, 232001, People’s Republic of China

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Citation and License

Nanoscale Research Letters 2012, 7:683  doi:10.1186/1556-276X-7-683

Published: 21 December 2012

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.

Keywords:
Ultrathin gold film; Surface plasmon resonance; SERS