期刊
ANALYTICAL CHEMISTRY
卷 92, 期 6, 页码 4623-4629出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.0c00164
关键词
-
资金
- National Natural Science Foundation of China [21807032]
- Natural Science Foundation of Hunan Province [2019JJ30007]
- Fundamental Research Funds for the Central Universities
- Hunan Provincial Innovation Foundation for Postgraduate [CX2018B186]
The label-free assay has drawn extensive attention because it does not require a labeling step and enables direct interaction and signal transduction between the sensing unit and target analytes. Herein, we demonstrate a proof-of-principle concept of a label-free and visualized nanoplasmonic strategy for silver ions sensing, where only Ti3C2 MXenes are employed by exploring their excellent adsorption affinity and reductive property toward metal ions. Ag+ was adsorbed onto the surface of Ti3C2 MXene nanosheets, followed by the Ti3C2 MXenes mediated in situ silver nanoparticles (Ag NPs) generation without adding any extra stabilizing or reducing agent. The excellent localized surface plasmon resonances at a particular wavelength provide Ag NPs the capability for colorimetric assay with a detection limit of 0.615 mu M. With the assistance of a smartphone, RGB analysis exhibited visualized results consistent with the results measured on a UV-vis spectrometer, promising a budget, simple-operating on-site detection. Moreover, the detection of Ag+ in real samples was achieved with satisfactory results meeting the analysis demand for the Drinking Water Standards of the World Health Organization (WHO) and the United States Environmental Protection Agency (U.S. EPA). These results reveal that Ti3C2 MXenes possess great potential in building convenient label-free colorimetry nanoplatforms and may evoke more inspirations to explore strategies for the direct sensing of analytes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据