Janus-Yarn Fabric for Dual-Mode Radiative Heat Management

Some like it hot (but others do not): Photonic engineered textiles are of significant interest for personal thermal regulation, as they can keep a person comfortable over a large temperature range, and provide the potential for substantial energy savings. However, yarn- or fiber-based dual-mode designs that provide both cooling and heating functionalities have been absent. By staggering metallic and dielectric fibers within a yarn, the authors propose an effective double-sided textile to achieve a large emissivity contrast between the two surfaces of the fabric.