Scalable Synthesis of Organic Micro/Nanocrystals via Confined Self‐Assembly in Spinning Fibers

Abstract

Organic low‐dimensional micro/nanocrystals (OLCs) with controllable morphologies, unique packing modes, and tunable physicochemical properties are attractive for chemical materials. Owing to their rapid crystallization and high environmental sensitivity induced by the weak noncovalent interactions in the self‐assembly, their large‐scale fabrication remains a huge challenge for practical applications. Herein, we propose a cost‐effective spinning chemistry strategy for continuously fabricating OLCs via their confined self‐assembly in the spinning fiber at a speed of 500 m h −1 . By precisely controlling supersaturation, solution viscosity, and double‐diffusion rate, the nucleation rate could be finely regulated, thereby tailoring the density and size of these packaged OLCs. Impressively, these prepared functional fibers rationally integrate the optoelectronic properties of OLCs and the spinning fibe r mechanical structure. Typically, the obtained luminescent fibers demonstrate multicolor emission from blue to green and red with a breaking strength of 13.4 MPa under 478% tensile strain, which holds great promise for wearable applications, such as colorful textile displays. This strategy can be generalized to other OLCs, presenting a significant breakthrough in the scalable fabrication of OLCs for commercialization.