草酸盐
化学
检出限
草酸钙
纳米复合材料
纳米探针
分析物
荧光
滤纸
尿
纳米颗粒
无机化学
纳米技术
色谱法
材料科学
生物化学
物理
量子力学
作者
Kelin Hu,Xin Chen,Xinmei Song,Yanhong Wu,Ke Huang,Piaopiao Chen
出处
期刊:Talanta
[Elsevier]
日期:2024-01-01
卷期号:266: 124976-124976
被引量:2
标识
DOI:10.1016/j.talanta.2023.124976
摘要
In the human body, oxalate tends to form calcium oxalate with calcium ions, which can trigger the formation of stones in the urinary system. Therefore, oxalate in urine is usually utilized as a crucial biomarker in clinical urolithiasis diagnoses. In this work, a turn-on fluorescent nanoprobe was developed based on nitrogen-doped carbon dots (N-CDs) and MnO2 nanosheets (NSs) nanocomposites for oxalate sensing in urolithiasis patients. MnO2 NSs is a good sensing platform with high extinction coefficients and rich redox chemistry. The fluorescent N-CDs can be quenched efficiently by MnO2 NSs through the inner filter effect (IFE) to form N-CDs-MnO2 nanocomposites. The reductive oxalate could operate the decomposition of MnO2 NSs to Mn2+ resulting in the dissociation of the N-CDs-MnO2 nanocomposites and fluorescence recovery of N-CDs. Under optimal conditions, the developed sensor revealed good specificity toward oxalate with a limit of detection (LOD) of 0.69 μM. The developed sensor was successfully applied to quantify oxalate content in 47 urine samples (41 urolithiasis patients and 6 healthy persons). The results showed great consistency with clinical diagnostic reports and computed tomography images. This novel method retains several unique advantages, including affordable, rapid, and validating potential clinical application.
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