Marques-Hueso, J, Jones, TDA, Watson, DE et al. (6 more authors) (2020) Spinach-based photo-catalyst for selective plating on polyimide-based substrates for micro-patterning circuitry. Chemical Engineering Research and Design, 153. pp. 839-848. ISSN 0263-8762
Abstract
This work demonstrates the suitability of spinach extract as a bio-catalyser for the photo-catalysed synthesis of silver nanoparticles on polyimide and polyetherimide, and their suitability as a seed-layer for the formation of conductive micro-track after plating. The study reveals that the extract can accelerate the reaction rates of the photo-patterning process by an order of magnitude, when applied on materials for flexible electronics and 3D printing. The two main components of the extract that can act as photo-catalysers - chlorophylls and plasmatic salts - have been individually studied by energy-dispersive X-rays, UV/Vis spectroscopy and X-ray Diffraction. A simple and well-defined method for extraction of chlorophyll-A (Ch-A) from fresh spinach at 120 ± 20 mg/L, has been developed. The study reveals that the main component enhancing photoreduction rates is due to the ionic salts present in the extract. The spinach extract has been demonstrated to be a valid catalyser to achieve highly conductive, selective electroless copper plating of track features, of thickness 0.5 ± 0.2 μm and conductivity (0.7 ± 0.2) × 107 S/m. 10 μm wide tracks are obtained, and the copper plating withstands the adhesion test. Demonstration of selective, ionic-liquid immersion plating of silver onto electroless copper, highlights a high quality metal protective layer finishing process desirable for reduced waste and toxicity.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. This is an author produced version of a paper published in Chemical Engineering Research and Design. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Chlorophyll; Silver nanoparticles; Selective plating; Photo-patterning; Flexible electronics; Polyimides |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Future Manufacturing Processes (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Jan 2020 15:31 |
Last Modified: | 20 Nov 2020 01:38 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.cherd.2019.10.044 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:155345 |