title: "Turn-off" fluorescent data array sensor based on double quantum dots coupled with chemometrics for highly sensitive and selective detection of multicomponent pesticides.
abstract: As a popular detection model, the fluorescence "turn-off" sensor based on quantum dots (QDs) has already been successfully employed in the detections of many materials, especially in the researches on the interactions between pesticides. However, the previous studies are mainly focused on simple single track or the comparison based on similar concentration of drugs. In this work, a new detection method based on the fluorescence "turn-off" model with water-soluble ZnCdSe and CdSe QDs simultaneously as the fluorescent probes is established to detect various pesticides. The fluorescence of the two QDs can be quenched by different pesticides with varying degrees, which leads to the differences in positions and intensities of two peaks. By combining with chemometrics methods, all the pesticides can be qualitative and quantitative respectively even in real samples with the limit of detection was 2 × 10(-8) mol L(-1) and a recognition rate of 100%. This work is, to the best of our knowledge, the first report on the detection of pesticides based on the fluorescence quenching phenomenon of double quantum dots combined with chemometrics methods. What's more, the excellent selectivity of the system has been verified in different mediums such as mixed ion disruption, waste water, tea and water extraction liquid drugs.
authors.affiliation: The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, PR China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Fan
authors.affiliation: The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Liu
authors.affiliation: The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, PR China.
authors.forename: Donglei
authors.initials: D
authors.lastname: Sun
authors.affiliation: The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, PR China.
authors.forename: Hanyue
authors.initials: H
authors.lastname: Lan
authors.affiliation: The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, PR China. Electronic address: fuhaiyan@mail.scuec.edu.cn.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Fu
authors.affiliation: The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, PR China. Electronic address: tmyang@mail.scuec.edu.cn.
authors.forename: Tianming
authors.initials: T
authors.lastname: Yang
authors.affiliation: State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, PR China. Electronic address: sheyb@zjut.edu.cn.
authors.forename: Yuanbin
authors.initials: Y
authors.lastname: She
authors.affiliation: The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, PR China.
authors.forename: Chuang
authors.initials: C
authors.lastname: Ni
mesh_terms: D057230:Limit of Detection; D010575:Pesticides / Q000032:analysis*; D045663:Quantum Dots; D013050:Spectrometry, Fluorescence
chemical_list: D010575:Pesticides
keywords: Chemometrics methods; Double quantum dots; Qualitative and quantitative analysis of various pesticides; Turn-off