Bandgap engineering of nanosized carbon dots through electron-accepting functionalization
| Autor: | Jin-Woo Oh, Jongwan Choi, Felix Sunjoo Kim, Nakjoong Kim |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Photoluminescence
Materials science Nitrile Band gap General Chemical Engineering chemistry.chemical_element Chemical modification 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Surface modification Density functional theory 0210 nano-technology Absorption (electromagnetic radiation) Carbon |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 65:104-111 |
| ISSN: | 1226-086X |
| DOI: | 10.1016/j.jiec.2018.04.018 |
| Popis: | We report tuning of energy bandgap of nanosized carbon dots by chemical modification with electron-accepting moieties. The carbon dot derivatives were synthesized by oxidation and hydrothermal reaction, followed by addition/substitution reactions, resulting in uniform-sized carbon dots. Structural characterization and photophysical investigation were performed by applying various microscopic and spectroscopic techniques. The bandgap of the carbon dots was controlled by chemical functionalization with nitro and nitrile groups, as evidenced by the red-shift in the absorption and photoluminescence emission spectra. Calculations based on density functional theory were employed to support the observed bandgap tuning via functionalization of the carbon dots. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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