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《Chinese Journal of Sensors and Actuators》 2011-09
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Electrochemiluminescence of CdTe/CdS Quantum Dots Immobilized on Nafion/HAp Hybrid Film and Its Application to Highly Selective Detection of Myoglobin

WANG Guotao1,JIA Liping2,ZHAO Qian1,TAO Xuquan2,JIA Wenli1,CUI Hui1,WANG Huaisheng1 1.College of Chemistry and Chemical Engineering;Liaocheng University,Liaocheng Shandong 252059,China; 2.College of Materials Science and Engineering,Liaocheng University,Liaocheng Shandong 252059,China  
CdTe/CdS QDs were immobilized on glassy carbon electrode(GCE)using hydroxyapatite(HAp)and Nafion.Compared with the ECL intensity of QDs dispersed in aqueous solution with the bare GCE,the chemically modified electrode could greatly enhance the ECL intensity of CdTe/CdS QDs in the presence of tri-n-propylamine(TPrA)as coreactant.A new ECL method has been developed for the determination of myoglobin(Mb)based on its quenching effect on the ECL intensity of CdTe/CdS quantum dots in pH 6.5 phosphate buffer solution(PBS).The results demonstrated that myoglobin could effectively quench the QDs emission based on the possible quenching mechanisms.Under the optimal conditions,the ECL intensity was decreased with the increase of Mb concentration in the range of 0.59 nmol/L~10.59 nmol/L with the detection limit of 0.12 nmol/L.
【Fund】: 国家自然科学基金项目(20775031 21075059)
【CateGory Index】: O649;O629.73
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