title: Fluorescent silver nanoclusters for user-friendly detection of Cu2+ on a paper platform.
abstract: The development of a user-friendly sensing platform for the detection of Cu(2+) in water is necessary as there are wide concerns due to the substantial impact of Cu(2+) on human health, environmental monitoring, and so on. Motivated by this, we report a fluorescent silver nanoclusters (AgNCs)-based sensor for the detection of Cu(2+). These water-soluble AgNCs, as a new class of fluorescent probes, were synthesized by using azobenzene modified poly(acrylic acid) (MPAA) as templates. Their fluorescence can be quenched in the presence of Cu(2+), which enables the label-free detection of Cu(2+) in real water samples. Furthermore, such AgNCs can be integrated onto cellulose filter paper and used as fluorescent indicators for Cu(2+). The fluorescence quenching can be observed by the naked eye under UV light. It should be noted that this AgNCs-based paper assay performs successfully in barrelled drinking water and river water samples. Therefore, it opens up new avenues to the development of robust clusters-based sensing platforms.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China.
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Liu
authors.forename: Chenghua
authors.initials: C
authors.lastname: Zong
authors.forename: Lehui
authors.initials: L
authors.lastname: Lu
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D001391:Azo Compounds; D002482:Cellulose / Q000737:chemistry; D003300:Copper / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D010209:Paper; D012834:Silver / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D001391:Azo Compounds; D005456:Fluorescent Dyes; D007477:Ions; D014867:Water; D012834:Silver; C006903:carbopol 940; D003300:Copper; D002482:Cellulose; C009850:azobenzene