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  Continuous hydrothermal flow synthesis of blue-luminescent, excitation-independent N-doped carbon quantum dots as nanosensors

Baragau, I.-A., Power, N. P., Morgan, D. J., Heil, T., Lobo, R. A., Roberts, C. S., et al. (2020). Continuous hydrothermal flow synthesis of blue-luminescent, excitation-independent N-doped carbon quantum dots as nanosensors. Journal of Materials Chemistry A, 8(6), 3270-3279. doi:10.1039/C9TA11781D.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-847C-B Version Permalink: http://hdl.handle.net/21.11116/0000-0005-B615-6
Genre: Journal Article

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 Creators:
Baragau, Ioan-Alexandru, Author
Power, Nicholas P, Author
Morgan, David John, Author
Heil, Tobias1, Author              
Lobo, Richard Alvares, Author
Roberts, Christopher S, Author
Titirici, Magdalena, Author
Dunn, Steve, Author
Kellici, Suela, Author
Affiliations:
1Nadezda V. Tarakina, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2522693              

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 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.

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Language(s): eng - English
 Dates: 2020-01-102020
 Publication Status: Published in print
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 Identifiers: DOI: 10.1039/C9TA11781D
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Title: Journal of Materials Chemistry A
  Abbreviation : J. Mater. Chem. A
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 8 (6) Sequence Number: - Start / End Page: 3270 - 3279 Identifier: ISSN: 2050-7488