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Ordered Hexagonal Nanoplasmonic Au Nanoparticle Arrays: AAO-Assisted Thermal Treatment Synthesis and Application as Surface-Enhanced Raman Scattering Substrates |
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| Authors: | Yi Zao Ye Xin Luo Jiangshan Kang Xiaoli Yi Yougen Yi Yong Huang Jing Jiang Xiaodong Tang Yongjian |
| Institution: | 1.Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang, 621900, China ;2.Co-Innovation Center for Energetic Materials, Southwest University of Science and Technology, Mianyang, 621900, China ;3.Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, China ;4.College of Physics and Electronics, Central South University, Changsha, 410083, China ; |
| Abstract: | We have reported on the synthesis of ordered hexagonal Au nanoparticle (NPs) arrays by anodic alumina oxide templates (AAO)-assisted thermal treatment. This simple process has led to the formation of an ordered hexagonal array of Au NPs on the surface of AAO. SERS properties of the ordered hexagonal Au NPs could be obtained by varying the size of Au NPs. Compared with the Au thin film on AAO, the SERS intensity of rhodamine adsorbed on the ordered hexagonal Au NPs was about 1000 times stronger. And the hexagonal Au NPs array films have had stronger Raman-enhanced signal compared to the disorder Au NPs films. Simulations according to the three-dimensional finite-difference time domain (3D-FDTD) have displayed that these electric field enhancements of the ordered hexagonal Au NPs are strongly dependent on the gap distance. Plasmonic ordered hexagonal Au NPs could provide us new platforms to realize novel optoelectronic devices. |
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