Method for preparing ratiometric fluorescent probe for cymoxanil based on double-emission quantun dot-silver nanoparticle complex
US10900899B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2019 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Mar 14, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/6432
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for preparing a ratiometric fluorescent probe for cymoxanil based on a double-emission quantum dot-silver nanoparticle complex, wherein, the double-emission carbon quantum dots and the silver nanoparticles are prepared, and the inner filter effect occurring between the double-emission carbon quantum dots and the dispersed silver nanoparticles causes the blue fluorescence quenching of the carbon quantum dots. However, the specific binding of cymoxanil to silver nanoparticles causes the silver nanoparticles to accumulate, and then the inner filter effect occurring between the double-emission carbon quantum dots and the dispersed silver nanoparticles causes the green fluorescence quenching of carbon quantum dots. In this regard, the linear relationship between the intensity ratio of two fluorescent emission peaks of carbon quantum dots and the molar concentration of cymoxanil is established, and the ratiometric fluorescent probe for cymoxanil is constructed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.