电化学（中英文）2024，Vol.30Issue(10)：28-40,13.DOI:10.61558/2993-074X.3482
金属有机框架功能化的纳米通道对锶离子进行高灵敏度检测
Highly Sensitive Detection of Strontium Ions Using Metal-Organic Frameworks Functionalized Solid-state Nanochannels
摘要
Abstract
Strontium-90,a highly radioactive isotope,accumulates within the food chain and skeletal structure,posing signif-icant 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.关键词
纳米通道/金属有机框架/传感器/锶离子/高灵敏检测Key words
Nanochannel/Metal-organic frameworks/Sensor/Strontium ion/Sensitivity detection引用本文复制引用
王旭刚,何正旭,丁德芳,罗雪芹,戴力,张炜奇,马群,黄羽,夏帆..金属有机框架功能化的纳米通道对锶离子进行高灵敏度检测[J].电化学（中英文）,2024,30(10):28-40,13.基金项目
This work was financially supported by the National Natural Science Foundation of China(No.22090050,No.22090052,No.22176180),National Basic Research Program of China(No.2021YFA1200400),the Natural Science Fo-undation of Hubei Province(No.2024AFA001),Shenzhen Science and Technology Program(No.JCYJ20220530162406014). （No.22090050,No.22090052,No.22176180）
