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A smartphone-integrated multicolor fluorescence probe of bacterial spore biomarker: The combination of natural clay material and metal-organic frameworks
- Source :
- Journal of hazardous materials. 402
- Publication Year :
- 2020
-
Abstract
- The metal-organic frameworks (MOFs) functionalized palygorskite (Pal) hybrid as a novel multicolor fluorescence probe for the detection of bacterial spore biomarker-dipicolinic acid (DPA), had been prepared via in-situ growth. The MOFs can effectively encapsulate dye molecules on the surface of Pal, and the rich carboxyl groups on its surface can coordinate with europium ions (Eu3+), forming a highly sensitive recognition group. The results indicated that the limit of detection (LOD) of this multicolor fluorescence probe was as low as 9.3 nM and was obviously lower than the amount of anthrax spores infecting the human body (60 μM). Moreover, a wide linear range from 0 to 35 μM was obtained. The high specific surface area of Pal, as well as the permanent porosity and suitable binding sites of Eu3+-doped MOFs may play a major role in the sensitivity and linear detection range. The multicolor fluorescence strategy made full use of the diversity of fluorescence signals collected by dye molecules and lanthanide ions, which can realize the real-time and on-site detection through the smartphone with a color-scanning application (APP). The practicability of this probe was further verified by detecting DPA released by non-infectious Bacillus subtilis.
- Subjects :
- Environmental Engineering
Health, Toxicology and Mutagenesis
0211 other engineering and technologies
chemistry.chemical_element
02 engineering and technology
010501 environmental sciences
Photochemistry
01 natural sciences
Specific surface area
Environmental Chemistry
Molecule
Humans
Waste Management and Disposal
Metal-Organic Frameworks
0105 earth and related environmental sciences
Fluorescent Dyes
Detection limit
Spores, Bacterial
021110 strategic, defence & security studies
Chemistry
fungi
Pollution
Fluorescence
Linear range
Clay
Metal-organic framework
Bacterial spore
Smartphone
Europium
Biomarkers
Subjects
Details
- ISSN :
- 18733336
- Volume :
- 402
- Database :
- OpenAIRE
- Journal :
- Journal of hazardous materials
- Accession number :
- edsair.doi.dedup.....857ef766d397dc512d83854a48a85eaa