title: Turn-on electrochemiluminescence sensing of Cd(2+) based on CdTe quantum dots.
abstract: A simple and sensitive method for the detection of cadmium ion was proposed based on the electrochemiluminescence (ECL) of thioglycolic acid capped-CdTe quantum dots (CdTe QDs). The ECL of CdTe QDs was firstly quenched by introduction of S(2)(-) and was restored due to following addition of Cd(2+), on the basis of which, a "turn-on" ECL method for the detection of Cd(2+) was demonstrated. The ECL of CdTe QDs exhibited linear response toward Cd(2+) concentration in the range from 6.3nM to 3.4μM (R=0.999) with a detection limit of 2.1nM. The proposed assay was simple, sensitive, selective, and practicable in real water samples.
authors.affiliation: Anhui Key Laboratory of Chemo-biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China.
authors.forename: Honglei
authors.initials: H
authors.lastname: Song
authors.affiliation: Anhui Key Laboratory of Chemo-biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China.
authors.forename: Miao
authors.initials: M
authors.lastname: Yang
authors.affiliation: Anhui Key Laboratory of Chemo-biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China.
authors.forename: Xinxin
authors.initials: X
authors.lastname: Fan
authors.affiliation: Anhui Key Laboratory of Chemo-biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China. Electronic address: hywang@mail.ahnu.edu.cn.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Wang
mesh_terms: D002104:Cadmium / Q000032:analysis*; D019187:Cadmium Compounds / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000379:methods; D057230:Limit of Detection; D008163:Luminescent Measurements / Q000379:methods*; D045663:Quantum Dots / Q000737:chemistry*; D013691:Tellurium / Q000737:chemistry*; D014867:Water / Q000032:analysis*
chemical_list: D019187:Cadmium Compounds; D002104:Cadmium; D014867:Water; D013691:Tellurium; C028337:cadmium telluride
keywords: Cd(2+); Electrochemiluminescence; Quantum dots; Turn-on