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SEM morphology of the left side; (a) OPFL, (b) as-spun OPFL/PLA/36.7% fiber mat on the water bath sonication device (inside; TEM morphology, 2 μm scale bar), (c) as-spun OPFL/PLA/36.7% fiber mat on the finger sonication utility, right side, (d) OBBL, (e) as-spun OBBL/PET/13.5%, and (f) as-spun OBBL/PET/24.5% fiber mats on the finger sonication utility.
