Peukert W, Wang W, Damm C, Walter J, Nacken T (2015)
Publication Language: English
Publication Status: Published
Publication Type: Journal article
Publication year: 2015
Book Volume: 18
Pages Range: 466-475
Journal Issue: 1
DOI: 10.1039/c5cp04942c
In this work we performed a detailed investigation of the photostability of bottom-up produced carbon nanodots (CDs) prepared from citric acid and urea by solvothermal synthesis. Analytical ultracentrifugation (AUC) reveals that the CDs have a hydrodynamic diameter of <1 nm and a very narrow size distribution. In the community it is widely assumed that CDs are photo-stable. In contrast, we found that CDs exposed to UV-irradiation exhibit noteworthy fluorescence degeneration compared to freshly prepared CDs or CDs stored in the dark, indicating that fluorescence bleaching is caused by a photochemical process. We found that fluorescence intensity decay due to exposure to UV-irradiation is accelerated in the presence of oxygen and identified the surface status of CDs as the decisive factor of fluorescence bleaching of CDs. Based on a discussion on the underlying mechanisms we show how to avoid photobleaching of CDs.
APA:
Peukert, W., Wang, W., Damm, C., Walter, J., & Nacken, T. (2015). Photobleaching and stabilization of carbon nanodots produced by solvothermal synthesis. Physical Chemistry Chemical Physics, 18(1), 466-475. https://dx.doi.org/10.1039/c5cp04942c
MLA:
Peukert, Wolfgang, et al. "Photobleaching and stabilization of carbon nanodots produced by solvothermal synthesis." Physical Chemistry Chemical Physics 18.1 (2015): 466-475.
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