1 Introduction The fluidic and metallic properties of room temperature liquid metal alloys have attracted numerous studies, in which they are incorporated as microfluidic-based stretchable conductors for soft and reconfigurable electronics, 1,2 and cooling fluids for miniature electronics. Ultimately, the applications of LM nanoparticles and nanocomposites are presented, followed by a brief outlook on the challenges and future developments of advanced liquid metal material systems. Next, the liquid metal nanoparticles are discussed as the functional units in polymer nanocomposites with enhanced electrical and thermal properties. In this review, we present an overview of the recent progress in synthesizing liquid nanoparticles with a focus on the role of processing parameters on their structure and surface properties. One main methodology is reducing the size of the liquid metal (LM) droplets to the micro and nanoscale level. In recent years, efforts have been made to integrate liquid metal alloys such as eutectic gallium–indium (EGaIn) and eutectic gallium–indium–tin (Galinstan) into wearable electronics, soft robotics, and biomedical devices.
Room temperature liquid metals are an emerging class of functional materials with applications in a variety of soft intelligent systems.
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