Mr. Shuai Huang Profile

Shuai Huang

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SPIE Journal Paper | 26 December 2017

Au–Pt–Au nanoraspberry structures used for mercury ion detection

Jiang-Hao Huang, Shuai Huang, Xiaoyan Wen, Min Li, Haifei Lu

OE, Vol. 56, Issue 12, 127104, (December 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.12.127104

KEYWORDS: Mercury, Absorption, Ions, Gold, Sodium, Lithium, Copper, Metals, Silver, Molecules

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Detection of Hg2+ with high sensitivity is of great significance in the biochemical sensing field. Quantitative of Hg2+ was realized based on the influence of Hg2+ on the UV–vis absorption performance of Au–Pt–Au core-shell nanoraspberry (APA)–rhodamine-6G (R6G) structure. First, APA sol was added into R6G indicator solution and the UV–vis absorption signal intensity of R6G was evidently promoted. The signal intensity monotonously increased as more APA sol was added. However, when HgCl2 solution was introduced, the signal intensity declined. A linear relationship between Hg2+ concentration and signal intensity at 527 nm was revealed, based on which quantitative determination of Hg2+ could be realized. Hg2+ detection sensitivity was measured to be 0.031 a.u./M with a limit of detection of 10-7 M and the response time was 20 s. A high Hg2+ detection selectivity over Cu2+, Na+, Li+, and K+ was demonstrated. Due to its simplicity and high sensitivity, the proposed method could find an extensive application prospect in the Hg2+ detection field.

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