Ultrasensitive visual detection of Hg2+ ions via the Tyndall effect of gold nanoparticles

Zihao Deng; Wenying Jin; Qiaobo Yin; Jinkun Huang; Ziheng Huang; Haiyan Fu; Yali Yuan; Jianmei Zou; Jinfang Nie; Yun Zhang

doi:10.1039/D0CC08003A

Ultrasensitive visual detection of Hg²⁺ ions via the Tyndall effect of gold nanoparticles†

Zihao Deng,‡^a Wenying Jin,‡^a Qiaobo Yin,^b Jinkun Huang,^a Ziheng Huang,^a Haiyan Fu,*^b Yali Yuan,

^a Jianmei Zou,^a Jinfang Nie^a and Yun Zhang

*^a

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* Corresponding authors

^a Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China
E-mail: zy@glut.edu.cn

^b The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
E-mail: fuhaiyan@mail.scuec.edu.cn

Abstract

This work reports a new methodology for naked-eye nanosensing of Hg²⁺ where the Tyndall effect of gold nanoparticles (GNPs) acts as a light scattering signalling readout. Its utility is demonstrated with ultrasensitive detection of the target with a limit down to 0.13 nM (∼5461-fold sensitivity improvement over conventional GNP-based methods with surface plasmon resonance signalling).

Chemical Communications

Ultrasensitive visual detection of Hg²⁺ ions via the Tyndall effect of gold nanoparticles†

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Ultrasensitive visual detection of Hg²⁺ ions via the Tyndall effect of gold nanoparticles

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Chemical Communications