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EnglishA 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.
| Titolo: | Synthesis, separation, and characterization of small and highly fluorescent nitrogen-doped carbon nanodots |
| Autori: | |
| Data di pubblicazione: | 2016 |
| Rivista: | |
| 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. |
| Handle: | http://hdl.handle.net/11368/2875649 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1002/anie.201510158 |
| URL: | http://dx.doi.org/10.1002/anie.201510158 |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |
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| Angew.pdf | This is the peer reviewed version of the article which has been published in final form at http://dx.doi.org/10.1002/anie.201510158. This article may be used for non-commercial purposes in accordance With Wiley-VCH Terms and Conditions for self-archiving. | Bozza finale post-referaggio (post-print) | Digital Rights Management non definito | Open Access Visualizza/Apri |
