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. 2023 Feb 21;12(13):2203297. doi: 10.1002/adhm.202203297

Figure 2.

Figure 2

Interfacial viscoelasticity is controlled by the molecular weight of PLL. A) Representative stress relaxation profiles of nanosheets assembled from PLL with different molecular weights (strain: 10−3 rad). B) Corresponding stress retentions σ R extracted from the corresponding fits. Error bars are s.e.m.; n ≥ 3. C) Epifluorescence microscopy images of PLL nanosheets assembled with PLL with a range of M w (all tagged with Alexa Fluor 488). Detail of interfaces: Novec 7500 containing 10 µg mL−1 PFBC; aqueous solution is PBS with pH adjusted to 10.5; PLL with different M w (3, 10, 22.5, 50, 110, 225, and >300 kDa) at a final concentration of 100 µg mL−1. One‐way ANOVA; n.s., non‐significant; **p < 0.01.