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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 7 — Jul. 27, 2011

Synthesis and Characterization of Gold Nanoparticles Coated with Ultrathin and Chemically Inert Dielectric Shells for SHINERS Applications

Jian-Feng Li, Song-Bo Li, Jason R. Anema, Zhi-Lin Yang, Yi-Fan Huang, Yong Ding, Yuan-Fei Wu, Xiao-Shun Zhou, De-Yin Wu, Bin Ren, Zhong-Lin Wang, and Zhong-Qun Tian

Applied Spectroscopy, Vol. 65, Issue 6, pp. 620-626 (2011)


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Abstract

We very recently reported a new spectroscopic application for expanding the versatility of surface Raman called “shell-isolated nanoparticle-enhanced Raman spectroscopy” or “SHINERS”. The most important and most difficult part of the SHINERS experiment is the effective transfer of the strong electromagnetic field from a gold core through the isolating silica or alumina shell to the probed surface. For this it is essential that the chemically inert dielectric shell be ultrathin (2–5 nm) yet pinhole-free. Herein we describe experimental and theoretical aspects of our SHINERS method in more detail. We provide a protocol for the synthesis and characterization of optimized shell-isolated nanoparticles (SHINs), and we examine the advantages of SHINERS nanoparticles over bare gold nanoparticles. We also present high-quality Raman spectra obtained from gold and platinum single-crystal surfaces in an electrochemical environment by our SHINERS technique. SHINERS is a simple and cost-effective approach that expands the flexibility of surface-enhanced Raman scattering (SERS) for an unprecedented diversity of applications in materials and surface sciences.

Virtual Issues
Vol. 6, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Jian-Feng Li, Song-Bo Li, Jason R. Anema, Zhi-Lin Yang, Yi-Fan Huang, Yong Ding, Yuan-Fei Wu, Xiao-Shun Zhou, De-Yin Wu, Bin Ren, Zhong-Lin Wang, and Zhong-Qun Tian, "Synthesis and Characterization of Gold Nanoparticles Coated with Ultrathin and Chemically Inert Dielectric Shells for SHINERS Applications," Appl. Spectrosc. 65, 620-626 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=as-65-6-620

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