标题:Promising Anodic Electrochemiluminescence of Nontoxic Core/Shell CuInS2/ZnS Nanocrystals in Aqueous Medium and Its Biosensing Potential
作者:Long, Xiaoyan; Zhang, Fang; He, Yupeng; Hou, Shifeng; Zhang, Bin; Zou, Guizheng
作者机构:[Long, Xiaoyan; Zhang, Fang; He, Yupeng; Hou, Shifeng; Zhang, Bin; Zou, Guizheng] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples 更多
通讯作者:Zou, Guizheng
通讯作者地址:[Zou, GZ]Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China.
来源:ANALYTICAL CHEMISTRY
出版年:2018
卷:90
期:5
页码:3563-3569
DOI:10.1021/acs.analchem.8b00006
摘要:Copper indium sulfide (CuInS2, CIS) nanocrystals (NCs) are a promising solution to the toxic issue of Cd- and Pb-based NCs. Herein, electrochemiluminescence (ECL) of CIS NCs in aqueous medium is investigated for the first time with L-glutathione and sodium citrate-stabilized water-soluble CIS/ZnS NCs as model. The CIS/ZnS NCs can be oxidized to hole-injected states via electrochemically injecting holes into valence band at 0.55 and 0.94 V (vs Ag/AgCl), respectively. The hole-injected state around 0.94 V can bring out efficient oxidative-reduction ECL with a similar color to Ru(bpy)(3)(2+) in the presence of tri-n-propylamine (TPrA) and enable CIS/ZnS NCs promising ECL tags with L-glutathione as linker for labeling. The ECL of CIS/ZnS NCs/TPrA can be utilized to determine vascular endothelial growth factor (VEGF) from 0.10 to 1000 pM with the limit of detection at 0.050 pM (S/N = 3). Although the hole injected state around 0.55 V is generated ahead of oxidation of TPrA and fails to bring out coreactant ECL, annihilation ECL proves that both hole-injected states generated, at 0.55 and 0.94 V, can be involved in electrochemical redox-induced radiative charge transfer by directly stepping CIS/ZnS NCs from electron-injecting potential to hole-injecting potential. CIS/ZnS NCs are promising nontoxic electrochemiluminophores with lowered ECL triggering potential around 0.55 V for less electrochemical interference upon the development of coreactant.
收录类别:EI;SCOPUS;SCIE
WOS核心被引频次:1
Scopus被引频次:1
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85043252471&doi=10.1021%2facs.analchem.8b00006&partnerID=40&md5=3f5a274ea3061a06a150a6b9f2271d0f
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