•  
  •  
 

Authors

Xu-Gang Wang, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
Zheng-Xu He, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
De-Fang Ding, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
Xue-Qin Luo, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
Li Dai, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
Wei-Qi , Zhang, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
Qun Ma, Department of Chemical Engineering, Graduate School of Engineering, Osaka Metropolitan University, Sakai, Osaka599-8570, Japan
Yu Huang, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. ChinaFollow
Fan Xia, a State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China; c c Shenzhen Research Institute of China University of Geosciences, Shenzhen 518052, Guangdong, PR China

Corresponding Author

Yu Huang(yuhuang@cug.edu.cn)

Abstract

Strontium-90, a highly radioactive isotope, accumulates within the food chain and skeletal structure, posing significant risks to human health. There is a critical need for a sensitive detection strategy for Strontium-90 in complex environmental samples. Here, solid-state nanochannels, modified with metal-organic frameworks (MOF) and specific aptamers, were engineered for highly sensitive detection of strontium ion (Sr2+). The synergistic effect between the reduced effective diameter of the nanochannels due to MOF and the specific binding of Sr2+ by aptamers amplifies the difference in ionic current signals, enhancing detection sensitivity significantly. The MOF-modified nanochannels exhibit highly sensitive detection of Sr2+, with a limit of detection (LOD) being 0.03 nmol·L–1, whereas the LOD for anodized aluminum oxide (AAO) without the modified MOF nanosheets is only 1000 nmol·L–1. These findings indicate that the LOD of Sr2+ detected by the MOF-modified nanochannels is approximately 33,000 times higher than that by the nanochannels without MOF modification. Additionally, the highly reliable detection of Sr2+ in various water samples was achieved, with a recovery rate ranging from 94.00% to 118.70%. This study provides valuable insights into the rapidly advancing field of advanced nanochannel-based sensors and their diverse applications for analyzing complex samples, including environmental contaminant detection, food analysis, medical diagnostics, and more.

Graphical Abstract

Keywords

Nanochannel; MOF; Sensor; Strontium ion; Sensitivity Detection

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2024-10-28

Online Available Date

2024-07-23

Revised Date

2024-05-18

Received Date

2024-04-30

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.