Issue 73, 2015
From the journal:

RSC Advances

A coordination and ligand replacement based three-input colorimetric logic gate sensing platform for melamine, mercury ions, and cysteine†

Lulu Zhang,a   Yanwen Yuan,a   Xinglin Wen,a   Yue Li,b   Cuong Cao*c  and  Qihua Xiong*ad  

* Corresponding authors

a Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
E-mail: Qihua@ntu.edu.sg

b Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, P. R. China

c Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, 18-30 Malone Road, Belfast, UK
E-mail: c.cao@qub.ac.uk

d NOVITAS, Nanoelectronics Center of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798

Abstract

Discrimination of different species in various target scopes within a single sensing platform can provide many advantages such as simplicity, rapidness, and cost effectiveness. Here we design a three-input colorimetric logic gate, based on the aggregation and anti-aggregation of gold nanoparticles (Au NPs), for the sensing of melamine, cysteine, and Hg2+. The concept makes use of the advantages of the highly specific coordination and ligand replacement reactions between melamine, cysteine, Hg2+, and Au NPs. Different outputs are obtained with the combinational inputs in the logic gates, which can serve as a reference to discriminate different analytes within a single sensing platform. Furthermore, besides the intrinsic sensitivity and selectivity of Au NPs to melamine-like compounds, the “INH” gates of melamine/cysteine and melamine/Hg2+ in this logic system can be employed for sensitive and selective detections of cysteine and Hg2+, respectively.

Graphical abstract: A coordination and ligand replacement based three-input colorimetric logic gate sensing platform for melamine, mercury ions, and cysteine

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Article information

DOI
https://doi.org/10.1039/C5RA09570K
Article type
Communication
Submitted
21 May 2015
Accepted
19 Jun 2015
First published
19 Jun 2015
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2015,5, 59106-59113

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A coordination and ligand replacement based three-input colorimetric logic gate sensing platform for melamine, mercury ions, and cysteine

L. Zhang, Y. Yuan, X. Wen, Y. Li, C. Cao and Q. Xiong, RSC Adv., 2015, 5, 59106 DOI: 10.1039/C5RA09570K

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