title: Fluorescent detection of TNT and 4-nitrophenol by BSA Au nanoclusters.
abstract: Rapid and sensitive detection of 2,4,6-trinitrotoluene (TNT) and 4-nitrophenol (4-NP) has attracted considerable attention due to their wide applications as nitroaromatic explosive materials. A novel fluorescence method for TNT and 4-NP based on bovine serum albumin functionalized fluorescent gold nanoclusters (BSA Au-NCs) has been developed. The detection probe BSA Au-NCs can be used as a fluorescent probe for the sensitive and selective detection of TNT and 4-NP simultaneously. A good linearity of fluorescence detection using BSA Au-NCs as a fluorescent probe was observed for TNT and 4-NP concentrations in the range of 10(-8)-5 × 10(-5) M and 10(-9)-5 × 10(-5) M, with a detection limit of 10 nM and 1 nM, respectively. The high specificity of TNT and 4-NP with BSA Au-NCs interactions provided excellent selectivity towards detecting TNT and 4-NP over other relevant nitroaromatic compounds. This system can be applied to test strips to detect TNT and 4-NP with high sensitivity and selectivity. The vapour of TNT and 4-NP can be detected using BSA Au-NCs test paper within 1 min with a detection limit of 10 pM and 1 pM.
authors.affiliation: Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis, Colleges of Heilongjiang Province, Harbin Normal University, 150025, P.R. China. fangchai@gmail.com 13654558066@163.com.
authors.forename: Xin
authors.initials: X
authors.lastname: Yang
authors.forename: Junhai
authors.initials: J
authors.lastname: Wang
authors.forename: Dongyue
authors.initials: D
authors.lastname: Su
authors.forename: Qingdong
authors.initials: Q
authors.lastname: Xia
authors.forename: Fang
authors.initials: F
authors.lastname: Chai
authors.forename: Chungang
authors.initials: C
authors.lastname: Wang
authors.forename: Fengyu
authors.initials: F
authors.lastname: Qu