Advance in carbon dots: a perspective from traditional quantum dots
Quantum dots (QDs) have been the core concept of nanoscience and nanotechnology since its inception, and plays a dominant role in the development of the nano-field. Carbon dots (CDots), defined by a feature size of ˂10 nm, have become a rising star in the crossing field of carbon materials and traditional QDs (TQDs). CDots own many unique structural, physicochemical and photochemical properties that render them a promising platform for biology, devices, catalysis and other applications. However, due to the complex nature of CDots, the profound understanding of the physical and chemical properties of CDots is still a great challenge. Subsequently, many key issues including structure, synthesis, and optical properties are unclear, leaving opening arguments and nonuniform description of their basics. The achievements and experience of TQDs in the past four decades are expected to provide crucial value for further development of CDots. Here, we will compare the research outputs of TQDs and CDots and try to give a comprehensive picture on their differences and correlations in structure, synthesis, properties and applications. Along this way, further perspectives are given on future directions and key issues toward better understanding of the basic properties and applications of TQDs and CDots in a unifying manner. We expect researchers in the community to foresee the great potential and a rational vision of CDots from the development of TQDs, paying special attention to the profound principles behand the synthetic chemistry, luminescence mechanisms and applications.
- This article is part of the themed collection: Carbon Dots