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. 2020 Jan 24;6(4):eaay9851. doi: 10.1126/sciadv.aay9851

Fig. 3. Molecular sieving from PTI.

Fig. 3

(A) PES for He, H2, and N2 on a PTI monolayer. (B) Orientation of He, H2, and N2 at the center of the PTI nanopore. (C) SEM image of the PTI nanosheet film incorporating m-PBI chains as spacers. (D) Bright-field TEM image of the freestanding PTI/m-PBI film. (E) Cross section of the membrane revealing a 128-nm-thick selective layer. AAO, anodic aluminum oxide. (F) Permeance of He, H2, CO2, N2, and CH4 as a function of temperature and (G) corresponding H2/CH4, H2/N2, and H2/CO2 ideal selectivities.