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- Title
Synthesis, Separation, and Characterization of Small and Highly Fluorescent Nitrogen-Doped Carbon NanoDots.
- Authors
Arcudi, Francesca; Đorđević, Luka; Prato, Maurizio
- Abstract
A facile bottom-up approach to carbon nanodots (CNDs) is reported, using a microwave-assisted procedure under controlled conditions. The as-prepared nitrogen-doped CNDs (NCNDs) show narrow size-distribution, abundant surface traps and functional groups, resulting in tunable fluorescent emission and excellent solubility in water. Moreover, we present a general method for the separation of NCNDs by low-pressure size-exclusion chromatography, leading to an even narrower size distribution, different surface composition, and optical properties. They display among the smallest size and the highest FLQYs reported so far. 13C-enriched starting materials produced N13CNDs suitable for thorough NMR studies, which gave useful information on their molecular structure. Moreover, they can be easily functionalized and can be used as water-soluble carriers. This work provides an avenue to size- and surface-controllable and structurally defined NCNDs for applications in areas such as optoelectronics, biomedicine, and bioimaging.
- Subjects
CARBON nanotubes; NANOTUBES; NANOSTRUCTURED materials synthesis; NITROGEN spectra; DOPED semiconductors; MICROWAVE chemistry; MOLECULAR self-assembly; NANOPARTICLE synthesis
- Publication
Angewandte Chemie International Edition, 2016, Vol 55, Issue 6, p2107
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201510158