Synthesis, properties and applications of carbon quantum dots

Abstract

 This article explains the preparation, properties, applications, and outlook of nano-material Carbon Quantum Dots. Considered by the application, the material can be prepared by top-down approach or bottom-up approach. In terms of the top-down approach, arc discharge, laser ablation, electrochemical method and chemical oxidation are included. The advantage of the approach is easy-operated and water-soluble. However, the high equipment requirement, hard controllability of particle size and morphology are the barriers of this approach. In comparison, the template, microwave, and hydrothermal methods from bottom-up approach overcomes the top-down approach’s flaws perfectly, but it faces reproducibility and purification problems. As one of the highly attracted nano-materials, Carbon Quantum Dots have excellent physicochemical and optical properties, which drives them to get big blaze in sensing and drug delivery applications. To become more proficient with this material, there is a prediction that enhancing precise control and customized optoelectronic properties would be the keys in following development.