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Can I read Tracking the Source of Carbon Dot Photoluminescence: Aromatic Domains versus Molecular Fluorophores on EtoBox?
Tracking the Source of Carbon Dot Photoluminescence: Aromatic Domains versus Molecular Fluorophores by Florian Ehrat; Santanu Bhattacharyya; Julian Schneider; Achim Löf; Regina Wyrwich; Andrey L. Rogach; Jacek K. Stolarczyk; Alexander S. Urban; Jochen Feldmann is a Engineering article available to read on EtoBox.
What is Tracking the Source of Carbon Dot Photoluminescence: Aromatic Domains versus Molecular Fluorophores about?
Carbon dots (CDs) are an intriguing fluorescent material; however, due to a plethora of synthesis techniques and precursor materials, there is still significant debate on their structure and the origin of their optical properties. The two most prevalent mechanisms to explain them are based on polycyclic aromatic hydrocarbon domains and small molecular fluorophores, for instance, citrazinic acid. Yet, how these form and whether they can exist simultaneously is still under study. To address this, we vary the hydrothermal synthesis time of CDs obtained from citric acid and ethylenediamine and show that in the initial phase molecular fluorophores, likely 2-pyridone derivatives, account for the blue luminescence of the dots. However, over time, while the overall size of the CDs does not change, aromatic domains form and grow, resulting in a second, faster decay channel at similar wavelengths and also creating additional lower energetic states. Electrophoresis provides further evidence that the ensemble of CDs consists of several subsets with different internal structure and surface charge. The understanding of the formation mechanism enables a control of the chemical origin of these emi
Who reads Tracking the Source of Carbon Dot Photoluminescence: Aromatic Domains versus Molecular Fluorophores?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Florian Ehrat; Santanu Bhattacharyya; Julian Schneider; Achim Löf; Regina Wyrwich; Andrey L. Rogach; Jacek K. Stolarczyk; Alexander S. Urban; Jochen Feldmann
- Publisher
- American Chemical Society (ACS)
- Published
- 2017
- Language
- EN
- Field
- Engineering (Physical Sciences)