Plasmonic Coupling Effect in Silver Spongelike Networks Nanoantenna for Large Increases of Surface Enhanced Raman Scattering

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• 作者：Zao Yi ; Jiangshan Luo ; Xibo Li ; Yong Yi ; Xibin Xu ; Pinghui Wu ; Xiaodong Jiang ; Weidong Wu ; Yougen Yi ; Yongjian Tang
• 刊名：Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：December 12, 2013
• 年：2013
• 卷：117
• 期：49
• 页码：26295-26304
• 全文大小：607K
• 年卷期：v.117,no.49(December 12, 2013)
• ISSN：1932-7455

文摘

The electric field enhancement of the silver spongelike networks has been described to be a systematic investigation by using three-dimensional finite-difference time-domain (3D-FDTD) simulation. Surface enhanced Raman scattering (SERS) measurements have indicated that the junction regions, the hollow nanostructured, and the sharp nanotips of the broken ligaments in the silver spongelike networks act as electromagnetic 鈥渉ot-spots鈥? The 3D-FDTD calculations have indicated that the silver spongelike networks may exhibit a high quality SERS characteristic because of the Ag chain length, chain diameters, chains gap, chains angle, and sharp nanotips. A maximum enhancement factor of 3.5 脳 10¹² can be obtained with the silver spongelike networks. As potential nanoantennas, silver spongelike networks can offer an effective method to optimize plasmon coupling for synthesizing devices.