Multi-color fluorescent carbon quantum dot as well as preparation method and application thereof

Abstract

The invention discloses a multi-color fluorescent carbon quantum dot and a preparation method and application thereof, and relates to a multi-color fluorescent carbon quantum dot and a preparation method thereof. The preparation method comprises the following steps of: putting ammonium citrate and urea into a reaction container, adding dimethylformamide, fully stirring to obtain a transparent clear solution, transferring the clear solution into a high-pressure kettle, putting the high-pressure kettle into a drying oven, and keeping the temperature at 150-200 DEG C for 14 hours to obtain a carbon quantum dot solution. The carbon quantum dot prepared by the invention has the advantages of controllable light emitting color, excellent optical performance, strong fluorescence, high quantum yield, stability, small influence of acid-base environment and the like. The raw materials of the multi-color carbon quantum dot prepared by the method are cheap and easily available, the experimental repeatability is high, the operation is simple, the preparation time is short, and large-scale production can be realized. The multi-color fluorescent carbon quantum dot is applied to the fields of bioluminescence labeling, white light illumination and the like.

Description

technical field [0001] The invention relates to luminescent nanometer materials, in particular to carbon quantum dots, in particular to a multifunctional multicolor fluorescent carbon quantum dot and its preparation method and application. Background technique [0002] Carbon nanomaterials are a research hotspot in the field of nanoscience and technology. Since the quasi-zero-dimensional carbon nanomaterial fullerene was reported in 1985, one-dimensional carbon nanotubes were discovered in 1991, and graphene with a two-dimensional structure was prepared in 2004. At the same time, Xu et al. observed fluorescent carbon nanoparticles for the first time in the process of preparing single-walled carbon nanotubes by purifying arc discharge in 2004. Through further research, the carbon nanoparticles are called carbon quantum dots. In 2006, Sun Yaping of Clementson University synthesized carbon quantum dots for the first time by laser etching. In 2007, carbon quantum dots with a ...

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Problems solved by technology

[0004] The invention solves the problems of toxicity and unstable luminescence when traditional organic dyes are used in the biological field, and the photodamage of blue light to biological imaging, provides a multi-functional multi-color fluorescent carbon quantum dot, and establishes a method with simple operation and simple equipment ﹑The preparation method with low raw materials and green environment protection; and using the red, green and blue fluorescent carbon quantum dots in the field of cell imaging and white light illumination

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