| 초록 |
Fluorescent carbon nanoparticles, known as carbon dots, have received great attention due to their biocompatibility, that is relatively suitable for in-vivo use compare to the toxic inorganic quantum dots. In fact, it has been known that partial depolymerization and dehydration of polysaccharides followed by polycondensation, resulting in carbon dots. However, trace amounts of phenolic compounds commonly existing in natural polysaccharides have been overlooked. Herein, we found that the ester-linked phenolic compound in natural polysaccharides, plays a facilitating role in carbon dot formation in which the electron-rich aromatic domain attracts carbonized polysaccharides via noncovalent interactions. The dramatically increased photoluminescence intensity of carbon dots from natural polysaccharides achieved by trace amounts of phenolic molecule addition, suggests that the phenolic compound is likely to act as a catalytic ‘seed’ site to promote the generation of carbon dots. |
