Figure 5.

SEM images. (a) PFA, (b) 10% Sil-PFA, (c) 20% Sil-PFA, and (d) 30% Sil-PFA composite membranes. Scale bar = 1 μm.

He et al. Nanoscale Research Letters 2011 6:637   doi:10.1186/1556-276X-6-637
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