Color-tunable carbon dots via control the degree of self-assembly in solution at different concentration
Authors:
- Tong Song,
- Yue Zhao,
- Katarzyna Matras-Postolek,
- Ping Yang
Abstract
Using carbon spheres and sucrose as the carbon sources, two kinds of color-tunable carbon dots (Cdots) named as Cdots-C and Cdots-S were prepared via change the solution concentration. As the concentration of Cdots solution increased, varying degrees of self-assembly occur between monodisperse Cdots. Hence aggregates with different types formed, which can be observed. Appearance of new excitation bands at 465 and 520 nm caused by H- and J-type Cdots aggregates caused the emission at long wavelengths. At the same time, the excitation band at 300–400 nm induced blue-green emission and the competitions of three excitation bands resulted in the color-tunable PL behaviour which cover the region from green to red emission. The difference of carbon sources of Cdots-C, Cdots-S and Cdots-G (graphite) explained the reason why concentration-dependent PL behaviour were not observed in Cdots-G at a high solution concentration. The process of self-assembly were ascribed to hydrogen bonding interaction between abundant hydroxyl groups on the surface of Cdots-C and Cdots-S. This work provided a simple approach to modulate photoluminescence (PL) color of Cdots and will extend the application in bioimaging.
- Record ID
- CUT8af43b2750af4930ba207c40bbf1d3a7
- Publication categories
- ;
- Author
- Journal series
- Journal of Luminescence, ISSN 0022-2313, e-ISSN 1872-7883
- Issue year
- 2019
- Vol
- 212
- Pages
- 69-75
- Other elements of collation
- schem.; tab.; wykr.; Bibliografia (na s.) - 74-75; Bibliografia (liczba pozycji) - 31; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 212
- Keywords in English
- carbon dots, self-assembly, photoluminescence, hydrogen bonding
- DOI
- DOI:10.1016/j.jlumin.2019.04.025 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0022231318324542 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 100
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT8af43b2750af4930ba207c40bbf1d3a7/
- URN
urn:pkr-prod:CUT8af43b2750af4930ba207c40bbf1d3a7
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.