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. 2014 Sep 6;11(98):20140499. doi: 10.1098/rsif.2014.0499

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© 2014 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — SEM micrographs of microstructured transparent epoxy substrates with squared arrays of cylindrical pillars of 1.4 µm in height and diameter. The centre-to-centre spacing is (a) 3, (b) 4, (c) 6, (d) 8, (e) 12 and (f) 22 μm. Scale bar, 5 µm.