Citation: JIA Shuo, BIAN Chao, TONG Jian-Hua, SUN Ji-Zhou, XIA Shan-Hong. A Fiber-Optic Sensor Based on Plasmon Coupling Effects in Gold Nanoparticles Core-Satellites Nanostructures for Detection of Mercury Ions (Ⅱ)[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(6): 785-790. doi: 10.11895/j.issn.0253-3820.160777 shu

A Fiber-Optic Sensor Based on Plasmon Coupling Effects in Gold Nanoparticles Core-Satellites Nanostructures for Detection of Mercury Ions (Ⅱ)

JIA Shuo ^1,2,3, ,
BIAN Chao ¹ ,
TONG Jian-Hua ¹ ,
SUN Ji-Zhou ¹ ,
XIA Shan-Hong ¹

1.
State Key Laborotary of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2.
University of Chinese Academy of Sciences, Beijing 100190, China;
3.
Northeastern University at Qinhuangdao, Qinhuangdao 066004, China

Received Date: 25 October 2016
Revised Date: 12 February 2017

Fund Project: This work was supported by the Major State Basic Research Development Program (No.2015CB352100) and the National Natural Science Foundation of China (No.61501100).

Based on the plasmon coupling effect in gold nanoparticles core-satellite nanostructures linked by thymine(T)-rich DNA hybridization and the specific Hg²⁺-mediated T-Hg²⁺-T base pair, a novel localized surface plasmon resonance (LSPR) optical fiber sensor was proposed and developed for Hg²⁺ detection in water. The Hg²⁺-induced conformational change in T-rich DNA sequence inhibited the DNA hybridization reaction, weakened the plasmon coupling effect and leaded to the change of LSPR resonance wavelength. The concentration of Hg²⁺ was quantitatively determined by the resonance wavelength redshift. The linear range of Hg²⁺ detection was about 5-150 nmol/L with LOD about 3.4 nmol/L. The specificity of the sensor was proved great by evaluating the response to other heavy metal ions such as Zn²⁺, Mg²⁺, Pb²⁺ and so on. This sensor was applied in environmental water detection by standard addition method,with the RSD less than 4.8% and recoveries of 94.2%-105.4%.
- Localized surface plasmon resonance,
- Gold nanoparticles core-satellites structure,
- Deoxyribonucleic acid,
- Mercury ion,
- Optical fiber sensor
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