Preparation method and application of fluorescence carbon quantum dots

Abstract

The invention provides a preparation method and an application of fluorescence carbon quantum dots. The fluorescence carbon quantum dots with excellent optical performances are synthesized from natural spinach under hydrothermal conditions through a one-step technology. The fluorescence carbon quantum dots emit blue lights under an ultraviolet light source, the quantum efficiency of the fluorescence carbon quantum dots is 53%, the fluorescence carbon quantum dots can be stored for a long term without generating precipitates, the fluorescence is difficult to bleach, and can last for 6 or more months, and the fluorescence carbon quantum dots can be used as fluorescent ink. The preparation method of the fluorescence carbon quantum dots is a simple one-time green synthesis route without any surface passivating agents, so the method has the characteristics of low cost, simple synthesis process and easy operation. A method for using a carbon quantum dot solution prepared from spinach as the fluorescent ink is simple to operate and is environmentally-friendly, and the carbon quantum dots can be used as a fluorescence imaging material, and also can be used for cell fluorescence imaging.

Description

technical field [0001] The invention belongs to the field of nanometer application technology, and in particular relates to a synthesis method and application of fluorescent carbon quantum dots. Background technique [0002] Carbon nanodots, also known as carbon quantum dots (C-Dots), are a new class of carbon nanomaterials with a size less than 10 nm, which were first discovered in 2004 when single-layer carbon nanotubes were purified by electrophoresis. Carbon dots have gradually become a new star in the family of carbon nanomaterials due to their abundant and cheap raw material resources, excellent water solubility, chemical inertness, low toxicity, easy functionalization and resistance to photobleaching. Carbon is generally considered a black material and is less fluorescent. The reason why carbon dots can attract widespread attention is that they have strong fluorescent properties, so they are also called fluorescent carbon dots. We know that carbon is a relatively ab...

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Problems solved by technology

There are also many methods such as the template method, but these methods are either complicated to operate or require relatively expensive materials or instruments, and the obtained carbon quantum dots have low fluorescence quantum efficiency.

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