▎ 摘　　要

Two-dimensional (2D) membranes enable ion-sieving through well-defined subnanoscale channels. In particular,graphene oxide (GO), a representative 2D material with aflexiblestructure, can be manufactured into various types of membranes,while defects such as pores and wrinkles are readily formed throughself-aggregation and self-folding during membrane fabrication. Suchdefects provide a path for small ionic or molecular species to beeasily penetrated between the layers, which deteriorates membraneperformance. Here, we demonstrate the effect of shear-inducedalignment with continuous agitation on GO membrane structureduring pressure-assistedfiltration. The shear stress exerted on theGO layers during deposition is controlled by varying the agitation rate and solution viscosity. The well-stacked 2D membrane isobtained via the facile shear-controlled process, leading to an improved salt rejection performance without additionalphysicochemical modifications. This simple approach can be extensively utilized to prepare the well-ordered structure of other2D materials in variousfields where the defect control is required