Issue 10, 2016
From the journal:

Analyst

Iodine-mediated etching of gold nanorods for plasmonic sensing of dissolved oxygen and salt iodine†

Zhiyang Zhang,ab   Zhaopeng Chen,*a   Fangbin Cheng,c   Yaowen Zhangab  and  Lingxin Chen ORCID logo ad  

* Corresponding authors

a Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS); Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai Shandong 264003, P. R. China
E-mail: zhpchen@yic.ac.cn

b University of Chinese Academy of Sciences, Beijing 100049, China

c Ocean school, Yantai University, Yantai 264005, P. R. China

d College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China

Abstract

Here, we have carefully investigated iodine-mediated etching of gold nanorods (AuNRs) in the presence of iodate and applied this phenomenon to on-site detection of dissolved oxygen (DO). Under given conditions, the quantitative conversion of target analytes DO to iodine leads to the etching of AuNRs along the longitudinal direction with the aid of cetyltrimethylammonium. As a result, the longitudinal localized surface plasmon resonance shifts to a short wavelength. The peak-shift can be used for quantitative determination of DO and iodate by a spectrophotometer. The satisfactory results from DO detection in different water samples and iodate detection in table salt indicate the feasibility of the proposed methods. Moreover, the as-prepared colorimetric test paper would make the detection more economical and simpler.

Graphical abstract: Iodine-mediated etching of gold nanorods for plasmonic sensing of dissolved oxygen and salt iodine

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Article information

DOI
https://doi.org/10.1039/C5AN02633D
Article type
Paper
Submitted
23 Dec 2015
Accepted
22 Mar 2016
First published
22 Mar 2016

Analyst, 2016,141, 2955-2961

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Iodine-mediated etching of gold nanorods for plasmonic sensing of dissolved oxygen and salt iodine

Z. Zhang, Z. Chen, F. Cheng, Y. Zhang and L. Chen, Analyst, 2016, 141, 2955 DOI: 10.1039/C5AN02633D

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