The Open UniversitySkip to content
 

Continuous Hydrothermal Flow Synthesis of Blue-Luminescent, Excitation-Independent N-doped Carbon Quantum Dots as Nanosensors

Baragau, Ioan-Alexandru; Power, Nicholas; Morgan, David John; Heil, Tobias; Lobo, Richard Alvares; Roberts, Christopher S.; Titirici, Magdalena; Dunn, Steve and Kellici, Suela (2020). Continuous Hydrothermal Flow Synthesis of Blue-Luminescent, Excitation-Independent N-doped Carbon Quantum Dots as Nanosensors. Journal of Materials Chemistry A, 8(6), article no. 3270.

Full text available as:
Full text not publicly available (Accepted Manuscript)
Due to publisher licensing restrictions, this file is not available for public download until 9 January 2021
Click here to request a copy from the OU Author.
DOI (Digital Object Identifier) Link: https://doi.org/10.1039/C9TA11781D
Google Scholar: Look up in Google Scholar

Abstract

Blue-luminescent N-doped carbon quantum dots (NCQDs) exhibiting rarely observed excitation independent optical properties are synthesised from citric acid in the presence of ammonia via a Continuous Hydrothermal Flow Synthesis (CHFS) approach. CHFS is an eco-friendly, rapid synthetic approach (within fractions of a second) facilitating ease of scale-up industrialization as well as offering materials with superior properties. The synthesised CQDs readily disperse in aqueous solution, have an average particle size of 3.3 ± 0.7 nm, with highest emission intensity at 441 nm (and a narrow full width at half maximum, FWHM ~78 nm) under a 360 nm excitation wavelength. Carbon quantum dots, without any further modification, exhibited a high selectivity and sensitivity as a nano-sensor for the highly toxic and carcinogenic chromium(VI) ions. The nano-chemo-sensor delivers significant advantages including simplicity of manufacturing via a continuous, cleaner technology (using targeted biomass precursor), high selectivity, sensitivity and fast response leading to potential applications in environmental industry as well photovoltaics, bio-tagging, bio-sensing and beyond.

Item Type: Journal Item
ISSN: 2050-7488
Keywords: carbon quantum dots; continuous hydrothermal flow synthesis; chromium (VI) sensing
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Life, Health and Chemical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Smart Materials
Item ID: 68981
Depositing User: Nicholas Power
Date Deposited: 13 Jan 2020 13:46
Last Modified: 21 Feb 2020 05:01
URI: http://oro.open.ac.uk/id/eprint/68981
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU