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Int. J. Mol. Sci. 2016, 17(12), 2006; doi:10.3390/ijms17122006

Green Synthesis of Silver Nanoparticles Stabilized with Mussel-Inspired Protein and Colorimetric Sensing of Lead(II) and Copper(II) Ions

Department of Advanced Organic Materials and Textile System Engneering, Chungnam National University, Daejeon 34134, Korea
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Academic Editor: Marco d’Ischia
Received: 13 October 2016 / Revised: 23 November 2016 / Accepted: 25 November 2016 / Published: 30 November 2016
(This article belongs to the Special Issue Melanin Based Functional Materials)
View Full-Text   |   Download PDF [3343 KB, uploaded 30 November 2016]   |  

Abstract

This articles reports a simple and green method for preparing uniform silver nanoparticles (AgNPs), for which self-polymerized 3,4-dihydroxy-l-phenylalanine (polyDOPA) is used as the reducing and stabilizing agent in aqueous media. The AgNPs functionalized by polyDOPA were analyzed by UV–Vis spectroscopy, high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), Raman spectrophotometry, and X-ray diffraction (XRD) techniques. The results revealed that the polyDOPA-AgNPs with diameters of 25 nm were well dispersed due to the polyDOPA. It was noted that the polyDOPA-AgNPs showed selectivity for Pb2+ and Cu2+ detection with the detection limits for the two ions as low as 9.4 × 10−5 and 8.1 × 10−5 μM, respectively. Therefore, the polyDOPA-AgNPs can be applied to both Pb2+ and Cu2+ detection in real water samples. The proposed method will be useful for colorimetric detection of heavy metal ions in aqueous media. View Full-Text
Keywords: 3,4-dihydroxy-l-phenylalanine (DOPA); mussel adhesive proteins (MAPs); colorimetric sensing; silver nanoparticles; heavy metal ion 3,4-dihydroxy-l-phenylalanine (DOPA); mussel adhesive proteins (MAPs); colorimetric sensing; silver nanoparticles; heavy metal ion
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Cheon, J.Y.; Park, W.H. Green Synthesis of Silver Nanoparticles Stabilized with Mussel-Inspired Protein and Colorimetric Sensing of Lead(II) and Copper(II) Ions. Int. J. Mol. Sci. 2016, 17, 2006.

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