title: Green Synthesis of Silver Nanoparticles Stabilized with Mussel-Inspired Protein and Colorimetric Sensing of Lead(II) and Copper(II) Ions.
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 × 10-5and 8.1 × 10-5μM, 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.
authors.affiliation: Department of Advanced Organic Materials and Textile System Engneering, Chungnam National University, Daejeon 34134, Korea. alranim@nate.com.
authors.forename: Ja Young
authors.initials: JY
authors.lastname: Cheon
authors.affiliation: Department of Advanced Organic Materials and Textile System Engneering, Chungnam National University, Daejeon 34134, Korea. parkwh@cnu.ac.kr.
authors.forename: Won Ho
authors.initials: WH
authors.lastname: Park
mesh_terms: D003300:Copper / Q000737:chemistry*; D004295:Dihydroxyphenylalanine / Q000737:chemistry; D007854:Lead / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D014961:X-Ray Diffraction
chemical_list: D007854:Lead; D012834:Silver; D004295:Dihydroxyphenylalanine; D003300:Copper
keywords: ">l-phenylalanine (DOPA); 3,4-dihydroxy-; colorimetric sensing; heavy metal ion; mussel adhesive proteins (MAPs); silver nanoparticles