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. 2023 Sep 1;39(37):13140–13148. doi: 10.1021/acs.langmuir.3c01547

Figure 6.

Figure 6

AFM images of HU films (MW = 330 kDa) without (A) and with (B–D) surface treatments before tensile testing: using doses of 200 μL water and 200 μL of nBT/IPA 3:7 mixtures. The doses were (B) 3× water and 20× alcohols mixture, (C) 4× water and 30× alcohols mixture, and (C) 5× water and 40× alcohols mixture, dosing sequence 5 s. All modification steps carried out at rotation speed 2100 rpm. Images from AFM. (E) Tensile curves of self-supporting films from (A–D). Sz indicates the sum of the largest peak height and the largest pit depth values within the defined area.