Advances on synthesis of highly luminescent carbon quantum dots by citric acid carbonization
| Autor: | M. Ortega Lopez, M. A. Perez-Guzman, R Ortega-Amaya |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Graphene Carbonization chemistry.chemical_element Nanotechnology 02 engineering and technology Green-light 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry Chemical engineering law Quantum dot Surface modification Self-assembly 0210 nano-technology Luminescence Carbon |
| Zdroj: | CCE |
| DOI: | 10.1109/iceee.2017.8108911 |
| Popis: | This work describes a simple method to produce highly luminescent carbon quantum dots (CQDs) emitting blue or green light. The method consists of the carbonization of citric acid at 250 °C under ambient condition and a further surface functionalization. The UV-Vis spectrum of these carbon nanostructures exhibited a well-resolved absorption band at 320 nm which was attributed to the n-π∗ transition of C-O groups mainly attached to the graphene sheet edge. Transmission electron microscopy corroborated the presence of CQDs. Additionally, a mechanism for the formation of the CQDs is proposed. |
| Databáze: | OpenAIRE |
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