Heated crystal flakes can be sewn into clothing for thermotherapy
(PHYSorg.com Nanotechnology)

Heated gloves, bracelets, and even rings are some of the potential applications of highly conductive MXene, a 2-D material made of alternating atomic layers of titanium and carbon. In a new study, researchers have fabricated MXene flakes, then electrostatically adhered the flakes to threads, and finally sewed the threads into ordinary fabrics that can be safely heated under a low voltage.