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Figure 2
(a), (c) and (e) Surface SEM images and (b), (d) and (f) cross-section SEM images of mesoporous titania films (a) and (b) as-prepared and (c)–(f) backfilled. Defects are highlighted with red circles. (b) The top surface of the sample is purple with the cross-section kept in grayscale. (d) PTB7-Th overlayer represented in dark blue, with lighter blue showing the infiltrated polymer, and the as-prepared material kept in grayscale. (f) PhenTe-BPinPh backfilling, with the top surface shown in darker orange and backfilled cross-section in yellow.

IUCrJ
Volume 7| Part 2| March 2020| Pages 268-275
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520000913