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Citation: ZHENG Si-Qing, LI Dan, DENG Wei, SI Wen-Shuai, BAI Bing. Fluorescence and Surface Enhanced Raman Scattering Dual Modal Detection of Zn²⁺ Based on Complexation Reaction-Induced Self-Aggregation of Nanoparticles[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(12): 1687-1693. doi: 10.19756/j.issn.0253-3820.201306 shu

Fluorescence and Surface Enhanced Raman Scattering Dual Modal Detection of Zn²⁺ Based on Complexation Reaction-Induced Self-Aggregation of Nanoparticles

ZHENG Si-Qing ¹ ,
LI Dan ^1,, ,
DENG Wei ¹ ,
SI Wen-Shuai ² ,
BAI Bing ²

1.
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China;
2.
Institute for Agro-Food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China

Corresponding author: LI Dan, dany@sit.edu.cn
Received Date: 25 May 2020
Revised Date: 13 August 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21507089, 21976123) and the Science and Technology Commission of Shanghai Municipality (No. 19391901800).

Optical nanoprobes have attracted extensive attention in area of analytical chemistry because of their unique structural characteristics and optical properties. In this study, a novel fluorescence/surface-enhanced Raman scattering (SERS) dual-modal nanoprobe was developed. The phenolic hydroxyl group and Schiff base of hydroxybenzoic acid derivative (NAMH) exhibited a preferential affinity towards Zn²⁺. The complexation between AgNPs@NAMH and Zn²⁺ induced the quenching of the fluorescent signal of NAMH, thus enabling the fluorescent detection of Zn²⁺ in complex samples with a detection limit of 0.32 nmol/L. Moreover, the Zn²⁺-triggered AgNPs aggregation led to the formation of abundant "hot spots" among NPs, which could be used for SERS analysis of Zn²⁺ with a detection limit of 0.68 pmol/L. This method had a number of advantages over conventional approaches in simplicity of operation, rapidity, high sensitivity and high selectivity, and provided new technical support for the immediate detection of environmental pollutants.
- Fluorescence,
- Surface-enhanced Raman scattering,
- Complexation reaction,
- Zinc ion
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Fluorescence and Surface Enhanced Raman Scattering Dual Modal Detection of Zn2+ Based on Complexation Reaction-Induced Self-Aggregation of Nanoparticles

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Fluorescence and Surface Enhanced Raman Scattering Dual Modal Detection of Zn²⁺ Based on Complexation Reaction-Induced Self-Aggregation of Nanoparticles