title: Fluorescent nanosensors via photoinduced polymerization of hydrophobic inorganic quantum dots for the sensitive and selective detection of nitroaromatics.
abstract: We developed an efficient one-pot strategy for the preparation of hydrophilic amine-functionalized nanocomposites by using hydrophobic fluorescence quantum dots ZnS:Mn(2+)@allyl mercaptan (QDs@AM) as building blocks through novel light-induced in situ polymerization. The average size of as-prepared hydrophilic nanocomposites was ∼50 nm, which could be further tuned by varying the concentrations of the monomers. Importantly, these nanocomposites were further utilized for the facile, highly sensitive, and selective detection of nitroaromatics. The linear ranges for 2,4,6-trinitrotoluene (TNT) and 2,4,6-trinitrophenol (TNP) lie in 0.01-0.5 μg/mL and 0.05-8.0 μg/mL, respectively, barely interfered with by other nitroaromatics such as 2,4-dinitrotoluene (DNT) and nitrobenzene (NB). Moreover, the novel surface modification method developed here offered a general strategy for fabricating hydrophobic nanocomposites with hydrophilic properties and indicated various potential applications including sensing and imaging.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, Beijing University of Chemical Technology , Beijing 100029, P. R. China.
authors.forename: Min
authors.initials: M
authors.lastname: Bai
authors.forename: Shuina
authors.initials: S
authors.lastname: Huang
authors.forename: Suying
authors.initials: S
authors.lastname: Xu
authors.forename: Gaofei
authors.initials: G
authors.lastname: Hu
authors.forename: Leyu
authors.initials: L
authors.lastname: Wang
mesh_terms: D000498:Allyl Compounds / Q000737:chemistry; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000032:analysis / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008345:Manganese / Q000737:chemistry; D036103:Nanotechnology; D009578:Nitrobenzenes / Q000032:analysis* / Q000737:chemistry; D055668:Photochemical Processes; D058105:Polymerization; D045663:Quantum Dots; D013440:Sulfides / Q000737:chemistry; D017967:Zinc Compounds / Q000737:chemistry
chemical_list: D000498:Allyl Compounds; D005456:Fluorescent Dyes; D009578:Nitrobenzenes; D013440:Sulfides; D017967:Zinc Compounds; D008345:Manganese; C031238:zinc sulfide