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Indium tin oxide nanowires manufactured via printing and laser irradiation

McGhee, JR; Goulas, A; Southee, DJ; Sagu, JS; Engstrøm, DS; Wang, J; Hutt, DA; ... Carmalt, CJ; + view all (2020) Indium tin oxide nanowires manufactured via printing and laser irradiation. Applied Materials Today , 21 , Article 100835. 10.1016/j.apmt.2020.100835. Green open access

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Abstract

Metallic and semiconductor nanowires can provide dramatically increased electrical and optical properties in a wide range of fields, ranging from photovoltaics to sensors and catalysts. In this research, a rapid manufacturing process has been developed for printing indium tin oxide microparticles and converting them into nanowires. Microparticle indium tin oxide (ITO) inks were formulated and printed. These were then converted into hierarchical nanowire films via laser irradiation (980 nm, NIR) with raster speeds of 40 mm s−1 in air, much faster compared to traditional manufacturing processes. For a 4 cm2 film, only 40 s of processing were required. A full materials characterization was performed on the materials pre and post laser processing with the most probable conversion mechanism found to be a laser induced carbothermal reduction process. Microstructural, chemical, and crystallographic evidence of the laser induced carbothermal reduction process were derived from SEM, XRD, XPS and TEM analysis. Compared to conventionally heat-treated printed samples, laser processing was found to increase the conductivity of the printed ITO from 0.88% to 40.47% bulk conductivity. This research demonstrates the ability of printing and laser processing to form nanowires in a high-speed manufacturing context, thereby enabling the development of printed non-transparent ITO nanowire electronics and devices.

Type: Article
Title: Indium tin oxide nanowires manufactured via printing and laser irradiation
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.apmt.2020.100835
Publisher version: https://doi.org/10.1016/j.apmt.2020.100835
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Keywords: Transparent conducting oxides, Laser processing, Printed electronics manufacturing, Additive manufacturing, Indium tin oxide, Nanostructures
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10111283
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