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. 2024 Apr 14;9(16):17977–17988. doi: 10.1021/acsomega.3c09461

Figure 5.

Figure 5

(a) Averaged spectra of random measurements collected on the air-exposed side of BP crystals after consecutive cycles of silk fibroin exfoliation. (b) Box plots of the ratio between the intensities of the Ag1 and B2g peaks of random spectra collected on the air-exposed side of bulk BP (blue dots), BP subjected to successive cycles of mechanical exfoliation (FE1–FE2–FE3, black), and BP subjected to liquid exfoliation. (c) STEM bright-field image of the BP flake obtained after the FE3 exfoliation process from 80/20 SF in formic acid.