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Optical properties of Ag nanoparticle-polymer composite film based on two-dimensional Au nanoparticle array film

Long-De Wang123, Tong Zhang13*, Xiao-Yang Zhang13, Yuan-Jun Song13, Ruo-Zhou Li13 and Sheng-Qing Zhu13

Author Affiliations

1 Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, and School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China

2 Department of Chemistry and Chemical Engineering, Huainan Normal University, Huainan 232001, People's Republic of China

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

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Nanoscale Research Letters 2014, 9:155  doi:10.1186/1556-276X-9-155

Published: 31 March 2014

Abstract

The nanocomposite polyvinyl pyrrolidone (PVP) films containing Ag nanoparticles and Rhodamine 6G are prepared on the two-dimensional distinctive continuous ultrathin gold nanofilms. We investigate the optical properties and the fluorescence properties of silver nanoparticles-PVP polymer composite films influenced by Ag nanoparticles and Au nanoparticles. Absorption spectral analysis suggests that the prominently light absorption in Ag nanowire/PVP and Ag nanowire/PVP/Au film arises from the localized surface plasmon resonance of Ag nanowire and Au nanofilm. The enhanced fluorescence is observed in the presence of Ag nanowire and Au nanofilm, which is attributed to the excitation of surface plasmon polariton resonance of Ag nanowire and Au nanofilm. The gold nanofilm is proven to be very effective fluorescence resonance energy transfer donors. The fabricated novel structure, gold ultrathin continuous nanofilm, possesses high surface plasmon resonance properties and prominent fluorescence enhancement effect. Therefore, the ultrathin continuous gold nanofilm is an active substrate on nanoparticle-enhanced fluorescence.

Keywords:
Metal nanocomposite; Optical properties; Localized surface plasmon resonance; Surface plasmon-enhanced fluorescence