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

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Synthesis and Characterization of Gold Nanoparticles Coated with Ultrathin and Chemically Inert Dielectric Shells for SHINERS Applications.htm (408bytes)
Date
2011
Author
Li, Jian-Feng
Li, Song-Bo
Anema, Jason R.
Yang, Zhi-Lin
Huang, Yi-Fan
Ding, Yong( Georgia Inst Technol, Sch Mat Sci & Engn)
Wu, Yuan-Fei
吴元菲
Zhou, Xiao-Shun
Wu, De-Yin
吴德印
Ren, Bin
任斌
Wang, Zhong-Lin( Georgia Inst Technol, Sch Mat Sci & Engn)
Tian, Zhong-Qun
田中群
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  • 化学化工-已发表论文 [14469]
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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.
Citation
APPLIED SPECTROSCOPY,2011,65(6):620-626
URI
http://dx.doi.org/doi:10.1366/10-06140
WOS:000291232100008
https://dspace.xmu.edu.cn/handle/2288/11639

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