title: Poly(acrylic acid)-templated silver nanoclusters as a platform for dual fluorometric turn-on and colorimetric detection of mercury (II) ions.
abstract: An easy prepared fluorescence turn-on and colorimetric dual channel probe was developed for rapid assay of Hg(2+) ions with high sensitivity and selectivity by using poly(acrylic acid)-templated silver nanoclusters (PAA-AgNCs). The PAA-AgNCs exhibited weak fluorescence, while upon the addition of Hg(2+) ions, AgNCs gives a dramatic increase in fluorescence as a result of the changes of the AgNCs states. The detection limit was estimated to be 2 nM, which is much lower than the Hg(2+) detection requirement for drinking water of U.S. Environmental Protection Agency, and the turn-on sensing mode offers additional advantage to efficiently reduce background noise. Also, a colorimetric assay of Hg(2+) ions can be realized due to the observed absorbance changes of the AgNCs. More importantly, the method was successfully applied to the determination of Hg(2+) ions in real water samples, which suggests our proposed method has a great potential of application in environmental monitoring.
authors.affiliation: Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Science, Changchun, Jilin 130022, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Tao
authors.forename: Youhui
authors.initials: Y
authors.lastname: Lin
authors.forename: Zhenzhen
authors.initials: Z
authors.lastname: Huang
authors.forename: Jinsong
authors.initials: J
authors.lastname: Ren
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Qu
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D002413:Cations, Divalent; D003124:Colorimetry / Q000379:methods; D060766:Drinking Water / Q000737:chemistry*; D004784:Environmental Monitoring; D005453:Fluorescence; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis*; D053768:Metal Nanoparticles / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000180:Acrylic Resins; D002413:Cations, Divalent; D060766:Drinking Water; D014874:Water Pollutants, Chemical; D012834:Silver; C006903:carbopol 940; D008628:Mercury