Rolled-Up Ag-SiOx Hyperbolic Metamaterials for Surface-Enhanced Raman Scattering

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• 作者：Yan Zhang ; Di Han ; Deyang Du ; Gaoshan Huang ; Teng Qiu ; Yongfeng Mei
• 关键词：Surface ; enhanced Raman scattering ; Hyperbolic metamaterials ; Roll ; up nanotechnology ; Microtube
• 刊名：Plasmonics
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：10
• 期：4
• 页码：949-954
• 全文大小：1,492 KB
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• 作者单位：Yan Zhang (1)
  Di Han (1)
  Deyang Du (1)
  Gaoshan Huang (2)
  Teng Qiu (1)
  Yongfeng Mei (2)
  
  1. Department of Physics, Southeast University, Nanjing, 211189, People鈥檚 Republic of China
  2. Department of Materials Science, Fudan University, Shanghai, 200433, People鈥檚 Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Biotechnology
  Nanotechnology
  Biophysics and Biomedical Physics
  Biochemistry
  
• 出版者：Springer US
• ISSN：1557-1963

文摘

A convenient technique is reported to fabricate Ag-SiOx hyperbolic metamaterials (HMMs) as robust surface-enhanced Raman scattering (SERS) substrates based on roll-up nanotechnology. As an illustration, dramatic enhancement is achieved using Rhodamine 6G as a molecular probe, which indicates that a larger plasmonic density of states exist, leading to a greatly enhanced local electromagnetic (EM) field when the sample is irradiated with a laser beam. Optimized results are obtained by controlling the thickness of alumina coating onto Ag-SiOx HMMs using atomic layer deposition. Finite-difference time-domain simulations further illustrate the excitation of localized surface plasmon modes by calculating the EM field properties on the surface of Ag-SiOx HMMs. This efficient method of producing Ag-SiOx HMMs with highly SERS-active properties could spur expanding applications in metamaterials and bioanalysis.