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Issue 1, 2012
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Multiple depositions of Ag nanoparticles on chemically modified agarose films for surface-enhanced Raman spectroscopy

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Abstract

A facile and cost-effective approach for the preparation of a surface-enhanced Raman spectroscopy (SERS) substrate through constructing silver nanoparticle/3-aminopropyltriethoxysilane/agarose films (Ag NPs/APTES/Agar film) on various solid supports is described. The SERS performance of the substrate was systematically investigated, revealing a maximum SERS intensity with four layers of the Ag NP deposition. The enhancement factor of the developed substrate was calculated as 1.5 × 107 using rhodamine 6G (R6G) as the probe molecule, and the reproducibility of the SERS signals was established. A high throughput screening platform was designed, manufactured and implemented which utilised the ability to cast agarose to assemble arrays. Quantitative analysis of 4-aminobenzoic acid (4-ABA) and 4-aminothiophenol (4-ATP) was achieved over a ∼0.5 nM–0.1 μM range.

Graphical abstract: Multiple depositions of Ag nanoparticles on chemically modified agarose films for surface-enhanced Raman spectroscopy

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Supplementary files

Article information


Submitted
28 Jul 2011
Accepted
19 Sep 2011
First published
07 Nov 2011

Nanoscale, 2012,4, 137-142
Article type
Paper

Multiple depositions of Ag nanoparticles on chemically modified agarose films for surface-enhanced Raman spectroscopy

W. Zhai, D. Li, L. Qu, J. S. Fossey and Y. Long, Nanoscale, 2012, 4, 137
DOI: 10.1039/C1NR10956A

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