High-quantum-yield eigenstate-fluorescence-adjustable carbon dot and preparing method and application thereof

Abstract

The invention relates to the field of fluorescence carbon nanomaterials, in particular to a high-quantum-yield eigenstate-fluorescence-adjustable carbon dot and a preparing method and application thereof. Diaminonaphthalene or a hydroxyl, carboxyl, methyl, ethyl, N,N-dimethyl and N,N-diethyl substituted ramification of the diaminonaphthalene and citric acid serve as carbon source precursors, an eigenstate fluorescence carbon dot solution can be obtained through a solvothermal method. The prepared eigenstate fluorescence carbon dot has the beneficial effects of being high in crystallization, high in surface passivation degree, even in nitrogen doping, even in size distribution and the like, and has the wide application prospect.

Description

Technical field

[0001] The invention relates to the field of fluorescent carbon nanomaterials, and in particular to carbon dots with high quantum yield and adjustable intrinsic state fluorescence, and a preparation method and application thereof. Background technique

[0002] Carbon Dots (CDs), as a new type of carbon nanomaterials with a size of less than 10nm, exhibit low toxicity, good biocompatibility, chemical inertness, stable fluorescence properties, and better surface modification capabilities. Devices, biomedicine, and sensors have broad application prospects. At present, the methods for preparing carbon dots are mainly divided into two categories: top-down and bottom-up. The top-down method generally uses bulk carbon materials as carbon sources, such as graphite, carbon fiber, carbon nanotubes, carbon black, coal, etc., to obtain carbon dots by means of violent oxidation and stripping. The bottom-up method is mainly based on small organic molecules or polymers as carb...

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