A crystal structure has a profound influence on the physical properties of the corresponding material. By synthesizing crystals with particular symmetries, one can strongly tune their properties, even for the same chemical configuration (compare graphite and diamond, for instance). Even more interesting opportunities arise when the structural phases of crystals can be changed dynamically through external stimulations. Such abilities, though rare, lead to a number of exciting phenomena, such as phase-change memory effects. In the case of trilayer graphene, there are two common stacking configurations (ABA and ABC) that have distinct electronic band structures and exhibit very different behaviors. Domain walls exist in the trilayer graphene with both stacking orders, showing fascinating new physics such as the quantum valley Hall effect. Extensive efforts have been dedicated to the phase engineering of trilayer graphene. However, the manipulation of domain walls to achieve precise control of local structures and properties remains a considerable challenge. Here, we experimentally demonstrate that we can switch from one structural phase to another by laser irradiation, creating domains of different shapes in trilayer graphene. The ability to control the position and orientation of the domain walls leads to fine control of the local structural phases and properties of graphene, offering a simple but effective approach to create artificial two-dimensional materials with designed atomic structures and electronic and optical properties.

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Textile thermoregulation and thermal protection are crucial for human health and safety. Individual thermophysiological comfort control and flame retardancy are lacking in traditional garments. Novel nanomaterial innovations have solved these limitations and have facilitated the development of next‐generation intelligent textiles. Smart textiles based on graphene and graphene derivatives material have attracted substantial attention owing to its superior electrical conductivity, high thermal conductivity, and flexibility. This review provides an overview of the current progress on the smart textiles using graphene and graphene derivative material with a focus on personal thermal management and flame retardancy. It covers mechanics, material developments, fabric designs, and on‐body applications, offering a comprehensive knowledge and scope of the entire area. Innovations in chemistry and materials with worldwide collaboration will push the frontiers of graphene‐based smart textiles, promoting the development of genuine commercial goods on the market.

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