Atomic-thick two-dimensional (2D) graphene oxide (GO) has emerged as an ideal building block in developing ultrathin 2D membranes for separating substances. However, due to the negative charge of GO sheets when hydrated, electrostatic repulsion causes GO membranes to disintegrate easily in water, limiting their wide application in aqueous solutions. Here, we introduce and apply the concept of localized gluing by designing ultra-small supramolecular-assembled nanoparticles as nano-adhesives (NPA) to construct robust GO membranes with a thickness of only 24 nm. The supramolecular-assembled NPA were synthesized by cyclodextrin (CD) and tannic acid (TA) with a uniform size distribution of about 4.5 nm, and exposed surface pyrogallols that could strongly interact with GO sheets. The physical sizing of the NPA confines the interlayer spacing and maintains the nanochannel, while the natural molecular properties of the NPA enhance the connection between adjacent layers and inhibit swelling detachment. The fabricated ultrathin 2D membranes show a remarkable two times enhancement of water permeance over pristine GO membranes and exhibit excellent durability with record-breaking stability for 720 h immersion in water. This strategy provides meaningful insights into the design and fabrication of robust ultrathin membranes for practical application.

Perovskites nanocrystals (NCs) with circularly polarized light (CPL) activity have drawn much attention due to the fascinating photoelectric properties of perovskite NCs as well as the abundant applications of CPL in three-dimensional (3D) displays, nonlinear optics, spintronics devices, CPL lasers, and so on. Herein, bio-inspired by life, we designed and synthesized a simple amphiphilic molecule which could self-assemble into chiral gel with helix chirality in non-polar solvents. Through co-assembly of the CsPbX₃ NCs with the chiral gel, CPL at the first excitation band of CsPbX₃ NCs is induced in the whole visible spectrum with a maximum g_lum of 8.2 × 10⁻³. The induced CPL arises from the selective CPL-absorption of the CsPbX₃ NCs’ luminesce by the chiral gel, which provides a facile and practical approach to induce CPL in perovskite NCs and other nanocrystals.