title: Visualizing gaseous nitrogen dioxide by ratiometric fluorescence of carbon nanodots-quantum dots hybrid.
abstract: A novel nanohybrid ratiometric fluorescence probe for on-site and visual determination of nitrogen dioxide (NO2) has been designed. The hybrid probe comprises blue-colored fluorescence carbon nanodots (CDs) and red-colored emission CdTe quantum dots (QDs). Such hybridized probe exhibits dual emission bands centered at 460 and 665 nm, respectively. The blue fluorescence of CDs is insensitive to the analyte, whereas the red emission of QDs is specifically quenched by the analyte, resulting in a distinguishable color change from orange-red to blue upon exposure to NO2. The limit of detection for nitrogen dioxide is estimated to be 19 nM in aqueous solution. More importantly, the nanohybrid probe has been successfully applied in visual detection of gaseous NO2 with a detection limit of 1 ppm, suggesting its potential application for NO2 sensing.
authors.affiliation: Institute of Intelligent Machines, Chinese Academy of Sciences , Hefei, Anhui 230031, China.
authors.forename: Yehan
authors.initials: Y
authors.lastname: Yan
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.forename: Kui
authors.initials: K
authors.lastname: Zhang
authors.forename: Houjuan
authors.initials: H
authors.lastname: Zhu
authors.forename: Huan
authors.initials: H
authors.lastname: Yu
authors.forename: Mingtai
authors.initials: M
authors.lastname: Sun
authors.forename: Dejian
authors.initials: D
authors.lastname: Huang
authors.forename: Suhua
authors.initials: S
authors.lastname: Wang