Issue 30, 2011
From the journal:

Chemical Communications

A highly selective and sensitive on–off sensor for silver ions and cysteine by light scattering technique of DNA-functionalized gold nanoparticles†

Da-Qian Feng,a   Guoliang Liu,a   Wenjie Zheng,a   Jie Liu,a   Tianfeng Chena  and  Dan Li*b  

* Corresponding authors

a Department of Chemistry, College of Life Science and Technology, Jinan University, Guangzhou 510632, China

b Department of Chemistry, Shantou University, Guangdong 515063, China
E-mail: dli@stu.edu.cn
Fax: (+86) 754-82902767

Abstract

DNA-functionalized gold nanoparticles are shown to act as a light-scattering switch. Ag+ ion turns on the switch through the DNA–Au NPs conjugates based on the formation of cytosine–Ag+–cytosine base pairs, whereas cysteine turns off the light-scattering signal because it competitively binds to Ag+.

Graphical abstract: A highly selective and sensitive on–off sensor for silver ions and cysteine by light scattering technique of DNA-functionalized gold nanoparticles

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Article information

DOI
https://doi.org/10.1039/C1CC12377G
Article type
Communication
Submitted
23 Apr 2011
Accepted
14 Jun 2011
First published
27 Jun 2011

Chem. Commun., 2011,47, 8557-8559

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A highly selective and sensitive on–off sensor for silver ions and cysteine by light scattering technique of DNA-functionalized gold nanoparticles

D. Feng, G. Liu, W. Zheng, J. Liu, T. Chen and D. Li, Chem. Commun., 2011, 47, 8557 DOI: 10.1039/C1CC12377G

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