Professor Woo-seong Kwon identifies energy structure and luminescence mechanism of carbon dots
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- Writer 커뮤니케이션팀
- 보도일자 2021-12-31
Professor Woo-seong Kwon of the Department of Chemical and Biological Engineering at Sookmyung Women’s University published the results of analyzing the chemical structure of carbon dots and elucidating the energy structure and luminescence mechanism in Carbon (IF = 9.594), the most prestigious magazine in the field of carbon.
(Title of Paper: Unraveling the origin of near-infrared emission in carbon dots by ultrafast spectroscopy)
Carbon dots are a representative eco-friendly quantum dot material and have recently been receiving great attention in biomedical and display fields.
This research was conducted jointly by Professor Kwon and Professor Ji-hee Kim of the Department of Energy Science at Sungkyunkwan University. It was also participated by Dr. Yoon-sang Park of the Institute of Advanced Materials and Systems at Sookmyung Women’s University, Yu-jin Kim, and Seong-yeon Won, students of the master＇s program in the Department of Chemical and Biological Engineering.
The research team revealed that the near-infrared light emission in the range of 1000 nm with a characteristic wavelength of carbon dots is due to the nano-graphitic structure, and based on this, they first proposed an overall model for the energy structure and light emission mechanism of carbon dots. In particular, they proved the validity of the model through ultrafast spectroscopy and density functional theory calculations, and reestablished the process by which the internal and surface chemical structures of carbon dots form quantum mechanical energy levels.
Professor Kwon said, "As the relationship between the chemical structure and luminescent properties of carbon dots has been established through this study, we plan to focus on improving the performance of carbon dots and broadening their application fields in the future."
