Layered Double Hydroxide‐Based Janus Particles

Abstract It is of great significance to break through the traditional layered double hydroxide (LDH) modification strategy and develop LDH‐based micro‐/nano‐materials with synergistic enhancement function and multi‐scenario application. Inspired by the Janus concept, the design and fabrication of LDH‐based Janus particles (LDH‐JPs) with a snowman‐like structure are presented. These LDH‐JPs are constructed by first synthesizing core–shell microspheres, followed by a swelling‐induced symmetry‐breaking approach that yields particles with one hemisphere composed of polystyrene and the other of LDH. This strategy is both universal and tunable, enabling the production of LDH‐JPs with various transition metals, geometries, and functionalities. This work opens new avenues for the development of Janus‐type LDH, facilitating their applications in broader fields.