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Properties of spin coated DHTA TFCs. (a) Correlation of active layer thickness to the spin coating speed and acid strength as found by measuring cross sections of SEM images. Salt rejection and water permeance when spin coated DHTA was protonated in (b) 1 M HCl and (c) 0.001 M HCl. All DHTA TFCs were tested with 2000 ppm of NaCl at 400 psi and pH 5.2 in dead-end mode. Dashed lines are provided as a guide to the eye.
