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. 2019 May 1;12(9):1424. doi: 10.3390/ma12091424

Figure 9.

Figure 9

(a) SEM image of the MOW end face and (b) a schematic view of hollow core region surrounded by the smaller capillaries in the course of particle suspension deposition, A1 and A2 are the cross-sections of bigger and smaller capillaries, and υ1 and υ2 are the flow velocities inside the bigger and smaller capillaries, respectively.