Nano Express
Two-dimensional ultrathin gold film composed of steadily linked dense nanoparticle with surface plasmon resonance
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
Nanoscale Research Letters 2012, 7:683 doi:10.1186/1556-276X-7-683
Published: 21 December 2012Abstract
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.
