Photobleaching and stabilization of carbon nanodots produced by solvothermal synthesis.

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Peukert W, Wang W, Damm C, Walter J, Nacken T
Zeitschrift: Physical chemistry chemical physics : PCCP
Jahr der Veröffentlichung: 2015
Band: 18
Heftnummer: 1
Seitenbereich: 466-475
ISSN: 1463-9084
Sprache: Englisch


Abstract


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.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Damm, Cornelia Dr.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Nacken, Thomas
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Peukert, Wolfgang Prof. Dr.-Ing.
Walter, Johannes Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Wang, Wenshuo
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Forschungsbereiche

A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

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 : PCCP, 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 : PCCP 18.1 (2015): 466-475.

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Zuletzt aktualisiert 2018-10-08 um 14:38