Defect engineering tunes the light-emission behavior of carbon quantum dots (IMAGE)
Caption
This schematic illustration shows how introducing different types of atomic-scale defects into carbon quantum dots (CQDs) can tune their optical behavior across a wide wavelength range. Vacancy defects, nitrogen doping, oxygen-containing functional groups, and combined defects each modify the electronic structure of CQDs in different ways, enabling light responses from the ultraviolet to the near-infrared region (313–1193 nm). These tunable properties could support future applications in sensing and detection, bioimaging, photocatalysis, solar energy conversion, and photothermal therapy.
Credit
Christian Ebere Enyoh from Saitama University
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