title: Poly(thymine)-templated fluorescent copper nanoparticles for ultrasensitive label-free detection of Pb²⁺ ion.
abstract: Polythymine (poly T)-templated copper nanoparticles (CuNPs) were demonstrated as novel and sensitive fluorescence probes for the detection of Pb(2+) based on the fluorescence quenching effect. The as-prepared CuNPs displayed strong fluorescence emission. However, the fluorescence of CuNPs was readily quenched in the presence of Pb(2+). These changes in fluorescence intensity of CuNPs allowed for the analysis of Pb(2+) with rapidity (<10 min), simplicity (label-free), high sensitivity (LOD 0.4 nM), high selectivity (no interference from other metal ions) and at low-cost (without any labels and sophisticated operation). We validated the practicality of using CuNPs for the determination of Pb(2+) in environmental samples through analyses of tap water samples.
authors.affiliation: College of Material and Chemical Engineering, Hunan Institute of Technology.
authors.forename: LiJuan
authors.initials: L
authors.lastname: Ou
authors.forename: XiaoYan
authors.initials: X
authors.lastname: Li
authors.forename: HongWei
authors.initials: H
authors.lastname: Liu
authors.forename: LiJuan
authors.initials: L
authors.lastname: Li
authors.forename: Xia
authors.initials: X
authors.lastname: Chu
mesh_terms: D003300:Copper / Q000737:chemistry*; D004785:Environmental Pollutants / Q000032:analysis; D005456:Fluorescent Dyes / Q000737:chemistry*; D007854:Lead / Q000032:analysis*; D053758:Nanoparticles / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013941:Thymine / Q000737:chemistry*; D014873:Water Pollutants / Q000032:analysis
chemical_list: D004785:Environmental Pollutants; D005456:Fluorescent Dyes; D014873:Water Pollutants; D007854:Lead; D003300:Copper; D013941:Thymine