文献类型：期刊文献

英文题名：In Situ Growth Visualization Nanochannel Membrane for Ultrasensitive Copper Ion Detection under the Electric Field Enrichment

作者：Gao, Hongli[1,3];Sun, Ruikun[1];He, Lei[1];Qian, Zhong-Ji[1];Zhou, Chunxia[1];Hong, Pengzhi[1];Sun, Shengli[1];Mo, Rijian[1];Li, Chengyong[1,2]

机构：[1]Guangdong Ocean Univ, Southern Marine Sci & Engn Guangdong Lab, Zhanjiang, Peoples R China;[2]Guangdong Ocean Univ, Shenzhen Inst, Shenzhen, Peoples R China;[3]Henan Sci & Technol Univ, Luoyang, Peoples R China

年份：2020

卷号：12

期号：4

起止页码：4849

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：SCI-EXPANDED(收录号：WOS:000510532000071)、、EI(收录号：20200508110137)、Scopus(收录号：2-s2.0-85078663250)、WOS

基金：This work was supported by the National Natural Science Foundation of China (21874029, 21605037), the Guangdong Yangfan Program (201635018), the Guangdong Special Support Program (2017TQ04N706), the Science and Technology Planning Project of Zhanjiang City (2018A02014), the Industrial Development Special Funds of Dapeng New Area (KY20180202), the Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) (ZJW-2019-07, ZJW-2019-08), and the Innovation and Development Project about Marine Economy Demonstration of Zhanjiang City (2017C8B1).

语种：英文

外文关键词：porous anodized aluminum oxide membrane; nanofluidic devices; CdSe quantum dots; fluorescence; enrichment

外文摘要：The transport of ionic species through nano-channels plays an important role in the basic research and practical application of nanofluidic devices. Here, a visualized CdSe@ZIF-8/PAA nanochannel membrane was created by employing in situ growth of zeolite imidazole skeleton (ZIF-8) and CdSe quantum dots (CdSe QDs) on a porous anodized aluminum oxide (PAM) membrane surface using CdSe QDs, 2-methylimidazole, and zinc nitrate as the precursor solvents. ZIF-8 is a kind of metal-organic framework, a .microporous material that possesses strong metal adsorption capacity. In addition, CdSe quantum dots have fluorescent properties. The nanochannel membrane detects copper ions (Cu2+) by quenching the fluorescence intensity by the interaction between Cu2+ and Se and S atoms. The direct potential of 5 V was applied to achieve Cu2+ enrichment at the nanochannel interface, and the fluorescence change was observed. The CdSe a@ZIF-8/PAA nanochannel membrane has a good linear range of concentration (0.01 pM-1 mu M) for Cu2+ detection. With the help of nanochannel enrichment, its detection limit reaches 4 fM. In addition, this nanochannel membrane has good selectivity for Cu2+.