Laser irradiated vortex fluidic mediated synthesis of luminescent carbon nanodots under continuous flow

Xuan Luo; Ahmed Hussein Mohammed Al-Antaki; Kasturi Vimalanathan; Jillian Moffatt; Kun Zheng; Yichao Zou; Jin Zou; Xiaofei Duan; Robert N. Lamb; Shujun Wang; Qin Li; Wei Zhang; Colin L. Raston

doi:10.1039/C7RE00197E

Laser irradiated vortex fluidic mediated synthesis of luminescent carbon nanodots under continuous flow†

Xuan Luo,

^ab Ahmed Hussein Mohammed Al-Antaki,^b Kasturi Vimalanathan,^b Jillian Moffatt,^c Kun Zheng,^de Yichao Zou,

^f Jin Zou,

^df Xiaofei Duan,^g Robert N. Lamb,^h Shujun Wang,

ⁱ Qin Li,

ⁱ Wei Zhang*^a and Colin L. Raston

*^b

Author affiliations

* Corresponding authors

^a Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Adelaide, SA 5042, Australia
E-mail: wei.zhang@flinders.edu.au

^b Centre for NanoScale Science and Technology (CNST), College of Science and Engineering, Flinders University, Adelaide, SA 5042, Australia
E-mail: colin.raston@flinders.edu.au

^c Institute for Photonics and Advanced Sensing, and School of Physical Sciences, The University of Adelaide, SA 5005, Australia

^d Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, QLD 4072, Australia

^e Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia

^f Materials Engineering, The University of Queensland, Brisbane, QLD 4072, Australia

^g Trace Analysis for Chemical, Earth and Environmental Sciences (TrACEES), The University of Melbourne, Victoria 3010, Australia

^h School of Chemistry, The University of Melbourne, Victoria 3010, Australia

ⁱ Environmental Engineering and Queensland Micro and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia

Abstract

Carbon nanodots (CDs) with size dependent fluorescence are synthesized from multi-walled carbon nanotubes (MWCNTs) under continuous flow in a vortex fluidic device (VFD) when irradiated by a pulsed laser with a wavelength of 1064 nm, without subsequent passivation procedures. The CDs have a relatively narrow size distribution averaging ca. 6 nm in diameter, and have low cytotoxicity and high colloidal stability with the highest emission intensity of the solution at 450 nm under a 345 nm excitation wavelength. Further downstream processing on the as-processed CDs revealed tunability of the emission from 450 nm to 325 nm.

This article is part of the themed collection: 2018 Reaction Chemistry & Engineering Hot Articles

Reaction Chemistry & Engineering

Laser irradiated vortex fluidic mediated synthesis of luminescent carbon nanodots under continuous flow†

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