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. 2018 Aug 31;3(8):10391–10405. doi: 10.1021/acsomega.8b01517

Figure 2.

Figure 2

SEM images of the glass microfiber filters used. The horizontal field width (HFW) is for (A) 995 μm and for (B) 29.8 μm. For the SEM analysis, the filter was washed with an ethanol solution (10 min, 3 times) followed by drying at atmospheric pressure in air.