Fig. 3: Regulation of CNTs-PA membrane pore size via applied voltage. | Nature Communications

Fig. 3: Regulation of CNTs-PA membrane pore size via applied voltage.

From: Regulation of molecular transport in polymer membranes with voltage-controlled pore size at the angstrom scale

Fig. 3: Regulation of CNTs-PA membrane pore size via applied voltage.The alternative text for this image may have been generated using AI.

a Schematic illustration of nanofiltration using CNTs-PA membrane as the cathode. b PEG rejections as function of molecular weight by the CNTs-PA membrane and corresponding MWCO at different applied voltages in the presence of 1000 ppm Na2SO4. c Pore radius of CNTs-PA membrane as a function of applied voltage in the presence of 1000 ppm Na2SO4. d Pore radius of CNTs-PA membrane as a function of Na2SO4 concentration at an applied voltage of 1.0 V. e Reversible change of pore radius of the CNTs-PA membrane when applied voltage switches between 0 and 1.0 V. f Demonstration of operando regulation of dye separation performance via adjusting the voltage applied on the CNTs-PA membrane. For c–e, the pore radii are estimated using the hinder transport model with rejections of PEG of different molecular weights as the inputs. Error bar represents the standard deviation of three replicate measurements. Source data are provided as a Source Data file.

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