Issue 4, 2011
From the journal:

Nanoscale

Mesoporous silica-coated gold nanorods: towards sensitive colorimetric sensing of ascorbic acidvia target-induced silver overcoating

Guoqing Wang,†‡a   Zhaopeng Chen†a  and  Lingxin Chen*a  

* Corresponding authors

a Key Laboratory of Coastal Zone Environmental Processes, CAS, Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
E-mail: lxchen@yic.ac.cn
Fax: (+86) 535-2109130

Abstract

This article describes a nonaggregation-based colorimetric assay of ascorbic acid by tailoring the optical properties of mesoporous silica-coated gold nanorods (MS GNRs) viasilver overcoating. The colorimetric measurement of ascorbic acid (AA) concentration strongly relies on the fact that the blue shift effect of localized surface plasmon resonance (LSPR) peak of MS GNRs is gradually enlarged with the increase of AA amount. The limit of detection is determined to be 49 nM, which is comparable to that of quantum dots (QDs)-based fluorimetric methods.

Graphical abstract: Mesoporous silica-coated gold nanorods: towards sensitive colorimetric sensing of ascorbic acidvia target-induced silver overcoating

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Article information

DOI
https://doi.org/10.1039/C0NR00863J
Article type
Paper
Submitted
14 Nov 2010
Accepted
10 Jan 2011
First published
18 Feb 2011

Nanoscale, 2011,3, 1756-1759

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Mesoporous silica-coated gold nanorods: towards sensitive colorimetric sensing of ascorbic acidvia target-induced silver overcoating

G. Wang, Z. Chen and L. Chen, Nanoscale, 2011, 3, 1756 DOI: 10.1039/C0NR00863J

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