Liquid metals (LMs) as emerging biomaterials possess unique advantages including their favorable biosafety, high fluidity, and excellent electrical and thermal conductivities, thus providing a unique platform for a wide range of biomedical applications ranging from drug delivery, tumor therapy, and bioimaging to biosensors. The structural design and functionalization of LMs endow them with enhanced functions such as enhanced targeting ability and stimuli responsiveness, enabling them to achieve better and even multifunctional synergistic therapeutic effects. Herein, the advantages of LMs in biomedicine are presented. The design of LM‐based biomaterials with different scales ranging from micro‐/nanoscale to macroscale and various components is explored in‐depth to promote the understanding of structure–property relationships, guiding their performance optimization and applications. Furthermore, the related advanced progress in the development of LM‐based biomaterials in biomedicine is summarized. Current challenges and prospects of LMs in the biomedical field are also discussed.

The in situ investigation of the dynamic growth process and novel assembly phenomena of graphene on liquid copper (Cu) is of great significance to deeply understand the special behavior of graphene and self-assembly mechanism. Here, the direct observation of the graphene growth and motion behavior on liquid Cu via in situ imaging is reported. Evidence of graphene movement on liquid Cu is offered and it is demonstrated that the translation and rotation behaviors of graphene are affected by the surface condition of liquid Cu. The self-assembly process of graphene array is also revealed by capturing the dynamic changes of graphene in real-time. Further analysis highlights the importance of surface energy of liquid Cu and the interaction between graphene building blocks during the self-assembling process. The growth parameters are also investigated to flexibly control the assembly configuration of graphene arrays. This work provides an insight into the mechanism of graphene motion and assembly behavior that can be used to guide the controllable manipulation of 2D materials and on-demand fabrication assembly structures with desired properties.

Controlled synthesis of graphene via chemical vapor deposition (CVD) is critical for its practical application. The in-depth understanding of the growth mechanism can effectively promote the fundamental research and guide the synthesis of graphene. In situ characterization techniques allow real-time monitoring the dynamic growth processes, which are expected as powerful tools to provide multiscale insights into reaction procedures and mechanisms under real-time conditions. In this Review, we will give a brief introduction of in situ techniques used to capture the growth processes of graphene. On this basis, the growth mechanism will be discussed. Finally, we will conclude the Review with insights into the challenges and future prospects in this emerging research field.

Motion Behavior of Graphene In article number 2100334, Mengqi Zeng, Lei Fu, and co‐workers open the “black box” of the growth, movement and self‐assembly of graphene on liquid metal via in situ technique. Graphene can translate, rotate, and spontaneously tend to be evenly distributed on liquid metal. This work offers an innovative way to explore the dynamic growth process and mechanism of 2D materials.