Fig. 5: In-depth investigation into the mechanism responsible for optimizing membrane separation performance.

a The surface area ratio (SAR) of the RO membranes was analyzed by AFM. b Water permeance and NaCl rejection of three conventional RO membranes: PES-RO fabricated on the PES substrate, PES-SAN-RO prepared on the PES substrate loaded with self-assembled nanowires, and PES-NSAN-RO constructed on the PES substrate loaded with nanowires but not performing the self-assembly process, respectively. c Water permeance and NaCl rejection of the RO-0.05 and NMPD (no MPD pre-enrichment) membranes developed via free-standing IP reaction. d–g Schematic illustration of nanowire-assisted MPD shuttling and MPD pre-enrichment for the construction of a dense PA layer. Error bars represent the s.d. (n = 3). Source data are provided as a Source Data file.