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. 2021 Jul 14;477(2251):20210062. doi: 10.1098/rspa.2021.0062

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© 2021 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 4. — (a) Section of a post-DCT SM shows degradation from melting of the polymer when directly exposed to heat and sparks emanating from CDT electrodes. (b) Scanning electron micrograph of a pre-CDT commercial SM with high-quality polymer fibres. (c) The same SM post-CDT when the discharge sparks and flames were 3 cm away from the mask surface reveals degradation from local, microscopic melting or fraying of polymer fibres, thus rendering the mask unfit for use. Full resolution images are available in the electronic supplementary material. Full-resolution scanning electron micrographs are available in [56].