期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 14, 页码 4847-4853出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tc05845a
关键词
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资金
- Natural Science Foundation of Shandong Province [ZR2020QE052]
- National Natural Science Foundation of China (NSFC) [11774188]
- Mountain Tai Young Scholarship [23170504]
- Excellent Youth Foundation of Shandong's Natural Scientific Committee [JQ201802]
- Scientific Research Foundation for Doctors in the Qilu University of Technology (Shandong Academy of Sciences) [81110306]
This study presents a fast processable one-step synthetic approach for the preparation of N and P codoped ultra-long-lived room-temperature phosphorescent carbon dots, which show significant potential in information encoding applications.
Room-temperature phosphorescent (RTP) carbon dots offer unique opportunities in information security applications, but the delay time of such materials reported thus far is typically shorter than 10 s and thus affects readout of the encoded information. Herein, a fast processable and one-step synthetic approach is developed for the preparation of N and P codoped carbonized polymer dots (NP-CPDs) exhibiting ultralong-lived RTP (URTP) responses. The URTP emission with the delay time exceeding 23 s (lifetime of similar to 1.48 s) can be clearly identified with the naked eye. The presence of self-protective covalently crosslinked frameworks with codoped N and P atoms and the formation of interdot/intradot hydrogen-bonded skeletons are suggested to account for the observed URTP phenomena. The NP-CPDs exhibit excellent water solubility and color conservation during repeated liquid-solid transformations, thus allowing for a fast and large-scale ink-jet print of such nanodots to encode information. Consequently, the potential application of such NP-CPDs in anticounterfeiting and information encryption is demonstrated. This study provides a facile strategy to prepare URTP nanostructures for intriguing applications.
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