10.1007/s40097-014-0117-y

Visual sensing of Hg2+ using unmodified Au@Ag core–shell nanoparticles

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  • Lihua Li1,
  • Dexiang Feng1,
  • Xian Fang2,
  • Xiaowei Han2,
  • Yuzhong Zhang*2,
  1. Anhui Key Laboratory of Chemo-Biosensing, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, CN Department of Pharmacy, Wannan Medical College, Wuhu, 241002, CN
  2. Anhui Key Laboratory of Chemo-Biosensing, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, CN
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Published in Issue 24-07-2014

How to Cite

Li, L., Feng, D., Fang, X., Han, X., & Zhang, Y. (2014). Visual sensing of Hg2+ using unmodified Au@Ag core–shell nanoparticles. Journal of Nanostructure in Chemistry, 4(3 (September 2014). https://doi.org/10.1007/s40097-014-0117-y
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Abstract

Abstract In this work, we have developed a novel visual Hg 2+ sensor in aqueous solution using unmodified Au@Ag core–shell nanoparticles at room temperature, based on a redox reaction between Ag-shell and Hg 2+ . The prepared Au@Ag core–shell nanoparticles exhibited good monodispersity. In the presence of Hg 2+ , Hg 2+ was reduced into Hg (0) by Ag-shell, and deposited on the surface of Au-core to form Au–Hg alloys and caused nanoparticles aggregation, leading to the color changes of the solution from yellow to purplish red, and the surface plasmon resonance spectra of Au@Ag core–shell nanoparticles red shift. Under the optimal conditions, the visual sensor could selectively detect Hg 2+ as low as 0.4 µM with the naked eye and 5.0 nM by UV–vis spectra analysis methods. The designed sensor had several advantages: (1) the nanoparticles surface need not be functionalized. (2) The color change of the solution was in 2 s and could easily be observed with naked eyes. The visual sensor had been applied to detection of Hg 2+ in tap and lake water, which obtained satisfied result.

Keywords

  • Visual sensor,
  • Hg2+,
  • Au@Ag core–shell nanoparticles
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References

  1. Lavoie et al. (2013) Biomagnification of mercury in aquatic food webs: a worldwide meta-analysis (pp. 13385-13394) https://doi.org/10.1021/es403103t
  2. Holmes et al. (2009) Is low-level environmental mercury exposure of concern to human health? (pp. 171-182) https://doi.org/10.1016/j.scitotenv.2009.09.043
  3. Clarkson et al. (2003) The toxicology of mercury-current exposures and clinical manifestations (pp. 1731-1737) https://doi.org/10.1056/NEJMra022471
  4. Wang et al. (2010) Colorimetric biosensing of mercury (II) ion using unmodified gold nanoparticle probes and thrombin-binding aptamer (pp. 1994-1998) https://doi.org/10.1016/j.bios.2010.01.014
  5. Zhang et al. (2011) Oligonucleotide probes applied for sensitive enzyme-amplified electrochemical assay of mercury (II) ions (pp. 3320-3324) https://doi.org/10.1016/j.bios.2011.01.006
  6. Lai et al. (2011) A highly selective electrochemical biosensor for Hg2+ using hemin as a redox indicator (pp. 3153-3158) https://doi.org/10.1016/j.electacta.2011.01.061
  7. Guha et al. (2011) Fluorescent Au@Ag core–shell nanoparticles with controlled shell thickness and Hg II sensing (pp. 13198-13205) https://doi.org/10.1021/la203077z
  8. Cheng et al. (2011) Azobenzene-based colorimetric chemosensors for rapid naked-eye detection of mercury(II) (pp. 7276-7281) https://doi.org/10.1002/chem.201003275
  9. Li et al. (2009) Naphthalimide-porphyrin hybrid based ratiometric bioimaging probe for Hg2+: well-resolved emission spectra and unique specificity (pp. 9993-10001) https://doi.org/10.1021/ac9018445
  10. Date et al. (2013) Trace-level mercury ion (Hg2+) analysis in aqueous sample based on solid-phase extraction followed by microfluidic immunoassay (pp. 434-440) https://doi.org/10.1021/ac3032146
  11. He et al. (2011) Development and validation of a competitive indirect enzyme-linked immunosorbent assay for the determination of mercury in aqueous solution (pp. 1859-1864) https://doi.org/10.1039/c1ay05108c
  12. Ding et al. (2011) A simple colorimetric sensor based on antiaggregation of gold nanoparticles for Hg2+ detection (pp. 161-167) https://doi.org/10.1016/j.colsurfa.2011.12.024
  13. Chansuvarn and Imyim (2012) Visual and colorimetric detection of mercury (II) ion using gold nanoparticles stabilized with a dithia–diaza ligand (pp. 57-64) https://doi.org/10.1007/s00604-011-0691-3
  14. Fan et al. (2009) Synthesis of starch-stabilized Ag nanoparticles and Hg2+ recognition in aqueous media (pp. 1230-1235) https://doi.org/10.1007/s11671-009-9387-6
  15. Farhadi et al. (2012) Highly selective Hg2+ colorimetric sensor using green synthesized and unmodified silver nanoparticles (pp. 880-885) https://doi.org/10.1016/j.snb.2011.11.052
  16. Wang et al. (2011) Ultrasensitive and dual functional colorimetric sensors for mercury (II) ions and hydrogen peroxide based on catalytic reduction property of silver nanoparticles (pp. 337-342)
  17. Chai et al. (2010) l-cysteine functionalized gold nanoparticles for the colorimetric detection of Hg2+ induced by ultraviolet light (pp. 025501-025506) https://doi.org/10.1088/0957-4484/21/2/025501
  18. Walekar et al. (2013) A novel colorimetric probe for highly selective recognition of Hg2+ ions in aqueous media based on inducing the aggregation of CPB-capped AgNPs: accelerating direct detection for environmental analysis (pp. 5501-5507) https://doi.org/10.1039/c3ay40827b
  19. Guo et al. (2012) A test strip platform based on DNA functionalized gold nanoparticles for on-site detection of mercury (II) ions (pp. 49-54) https://doi.org/10.1016/j.talanta.2012.01.012
  20. Xie et al. (2012) A triple-channel optical signal probe for Hg2+ detection based on acridine orange and aptamer-wrapped gold nanoparticles (pp. 11479-11482) https://doi.org/10.1039/c2jm31280h
  21. Ma et al. (2013) Colorimetric sensing strategy for mercury(II) and melamine utilizing cysteamine-modified gold nanoparticles (pp. 5338-5343) https://doi.org/10.1039/c3an00690e
  22. Tao et al. (2012) Poly(acrylic acid)-templated silver nanoclusters as a platform for dual fluorometric turn-on and colorimetric detection of mercury (II) ions (pp. 290-294) https://doi.org/10.1016/j.talanta.2011.10.043
  23. Yuan et al. (2013) Dendrimer-stabilized silver nanoparticles enable efficient colorimetric sensing of mercury ions in aqueous solution (pp. 5486-5492) https://doi.org/10.1039/c3ay41331d
  24. Xin et al. (2012) A rapid colorimetric detection method of trace Cr(VI) based on the redox etching of Agcore–Aushell nanoparticles at room temperature (pp. 122-127) https://doi.org/10.1016/j.talanta.2012.09.009
  25. Lou et al. (2011) Colorimetric detection of trace copper ions based on catalytic leaching of silver-coated gold nanoparticles (pp. 4215-4220) https://doi.org/10.1021/am2008486
  26. Huang and Zhang (2012) Label-free electrochemical DNA biosensor based on a glassy carbon electrode modified with gold nanoparticles, polythionine, and grapheme (pp. 463-470) https://doi.org/10.1007/s00604-011-0719-8
  27. Liu et al. (2006) Analytical separation of Au/Ag core/shell nanoparticles by capillary electrophoresis (pp. 340-346) https://doi.org/10.1016/j.chroma.2006.08.033
  28. Lin et al. (2010) Colorimetric sensing of silver(I) and mercury(II) ions based on an assembly of tween 20-stabilized gold nanoparticles (pp. 6830-6837) https://doi.org/10.1021/ac1007909