Fig. 1. (a) Liquid cell holder with mounted PCTE membrane. (b) Inverted microscopic micrograph (40×) of PCTE membrane. (c) Inverted microscopic micrograph (40×) of PCTE membrane after GO coating. (d) SEM micrograph of GO coated membrane (Mag = 1 kX). (e) SEM micrograph of normal PCTE membrane (Mag = 15 kX). (f) FTIR spectra of GO coated PCTE membrane