Construction of CdSe/ZnS quantum dot microarray in a microfluidic chip  

作　　者：LIU HongWei JING YingYing YU Xu PANG DaiWen ZHANG ZhiLing 

机构地区：[1]Key Laboratory of Analytical Chemistry for Biology and Medicine(Ministry of Education),College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,China [2]Institute of Biomedical and Health Engineering,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China

出　　处：《Science China Chemistry》2012年第4期543-549,共7页中国科学（化学英文版）

基　　金：supported by the National Basic Research Program of China (2011CB933600);the Science Fund for Creative Research Groups (20921062);the National Natural Science Foundation of China (21175100);the Program for New Century Excellent Talents in University (NCET-10-0656)

摘　　要：Microarray technology has been proved to be greatly helpful for biomedical and biological diagnosis. And the evaluation of its biological applications lies in the detection sensitivity, which requires high intensity and stability of the signal. Recently, several nanomaterials, especially semiconductor nanomaterials, due to their excellent fluorescence properties, have been widely used to construct microarrays for biosensors. Here, we presented an approach for constructing CdSe/ZnS quantum dot (QD) microarray in microfluidic channels on a glass slide by photolithography. The conditions for immobilizing stable and uniform QD microarray on the glass slide were optimized. Several types of QD microarrays with different emission wavelengths and modified groups were constructed using silanization and lithography technology. Based on the fluorescence quenching effect of Cu2+ on QDs, the microfluidic chip with QD microarray was applied for the determination of Cu2+. 1 nmol/L Cu2+ could be detected by this method.Microarray technology has been proved to be greatly helpful for biomedical and biological diagnosis. And the evaluation of its biological applications lies in the detection sensitivity, which requires high intensity and stability of the signal. Recently, several nanomaterials, especially semiconductor nanomaterials, due to their excellent fluorescence properties, have been widely used to construct microarrays for biosensors. Here, we presented an approach for constructing CdSe/ZnS quantum dot （QD） microarray in microfluidic channels on a glass slide by photolithography. The conditions for immobilizing stable and uniform QD microarray on the glass slide were optimized. Several types of QD microarrays with different emission wavelengths and modified groups were constructed using silanization and lithography technology. Based on the fluorescence quenching effect of Cu2＋ on QDs, the microfluidic chip with QD microarray was applied for the determination of Cu2＋. 1 nmol/L Cu2＋ could be detected by this method.

关 键 词：MICROARRAY quantum dots microfluidic CU2+ 

分 类 号：O657[理学—分析化学] TN304.25[理学—化学]