Highly reproducible SERS substrate based on polarization-free Ag nanoparticles decorated SiO2/Si core-shell nanowires array

SiO2/Si core-shell nanowires array coated with gap-rich silver nanoparticles were demonstrated as a highly reproducible surface-enhanced Raman scattering (SERS) substrate. SERS detection of a relative standard deviation of 8% for 10−4 M R6G with a spot size of ∼2 μm and 900 spots over an area of 150...

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Bibliographic Details
Published inAIP advances Vol. 5; no. 5; pp. 057159 - 057159-5
Main Authors Liu, Xiao-Ying, Huang, Jian-An, Yang, Bo, Zhang, Xue-Jin, Zhu, Yong-Yuan
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 01.05.2015
AIP Publishing LLC
Subjects
Nanoparticles
Nanowires
Polarization
Raman spectra
Reproducibility
Shells
Silicon dioxide
Silver
Substrates
Thickness
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Summary:SiO2/Si core-shell nanowires array coated with gap-rich silver nanoparticles were demonstrated as a highly reproducible surface-enhanced Raman scattering (SERS) substrate. SERS detection of a relative standard deviation of 8% for 10−4 M R6G with a spot size of ∼2 μm and 900 spots over an area of 150 × 150 μm2 was reported. The high reproducibility is ascribed to the polarization-independent electrical field distribution among three-dimensional nanowire structure with an optimized thickness of SiO2 shell layer.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4921943