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Issue 29, 2015
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An ordered mesoporous Ag superstructure synthesized via a template strategy for surface-enhanced Raman spectroscopy

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Abstract

Surface-enhanced Raman scattering (SERS) substrates with high density and uniformity of nanogaps are proven to enhance the reproducibility and sensitivity of the Raman signal. Up to now, the syntheses of a highly ordered gold or silver superstructure with a controllable nanoparticle size and a well-defined particle gap have been quite limited. Here, we reported an ordered mesoporous silver superstructure replicated by using ordered mesoporous KIT-6 and SAB-15 as templates. By means of a nanocasting process, the ordered mesoporous Ag superstructure was successfully synthesized, which shows uniform distribution of the nanowire diameter (10 nm) and nanogap size (∼2 nm), thus exhibiting a high Raman enhancement of ∼109. The finite difference time-domain (FDTD) results indicate that the ordered mesoporous Ag superstructure has a uniform distribution of hot spots. Therefore, the mesoporous silica template strategy presented here could lead to a new class of high quality SERS substrates providing extraordinary potential for diverse applications.

Graphical abstract: An ordered mesoporous Ag superstructure synthesized via a template strategy for surface-enhanced Raman spectroscopy

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Article information


Submitted
08 Jun 2015
Accepted
23 Jun 2015
First published
24 Jun 2015

Nanoscale, 2015,7, 12318-12324
Article type
Communication
Author version available

An ordered mesoporous Ag superstructure synthesized via a template strategy for surface-enhanced Raman spectroscopy

C. Tian, J. Li, C. Ma, P. Wang, X. Sun and J. Fang, Nanoscale, 2015, 7, 12318
DOI: 10.1039/C5NR03759J

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