Issue 9, 2020

DES-N-doped oxygenated carbon dot colloidal solutions for light harvesting and bio-imaging applications

Abstract

A novel colloidal system comprising choline oleate in deep eutectic solvent (DES: choline chloride–ethylene glycol) is developed and utilized for in situ generation and stabilization of nanosized (1 to 3 nm) N-doped oxygenated, crystalline CDs via dissolution of gelatin. Self-assembly of choline oleate in DES has been characterized using surface tension, DLS and 2D NMR NOESY methods. The stability of colloidal CDs was examined using FTIR and Raman spectroscopy. TEM, HR-TEM, and PXRD techniques have been used to characterize CDs. Optical properties have been investigated using UV, fluorescence and time-resolved photoluminescence (TrPL) spectroscopy. Colloidal CDs possess bright blue to red luminescence and short fluorescence lifetime with exceptionally high quantum yield (ca. 82%), and exhibited excellent biocompatibility as bioimaging agents towards labeling of bacterial cells (both Gram positive and Gram negative), thus indicating a potential benign system for disease detection, drug delivery and light harvesting applications.

Graphical abstract: DES-N-doped oxygenated carbon dot colloidal solutions for light harvesting and bio-imaging applications

Supplementary files

Article information

Article type
Paper
Submitted
19 Aug 2020
Accepted
11 Nov 2020
First published
12 Nov 2020
This article is Open Access
Creative Commons BY license

Mater. Adv., 2020,1, 3476-3482

DES-N-doped oxygenated carbon dot colloidal solutions for light harvesting and bio-imaging applications

K. Damarla, S. Mehra, T. S. Kang, S. Yadav, A. Mishra and A. Kumar, Mater. Adv., 2020, 1, 3476 DOI: 10.1039/D0MA00621A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements