Carbon nanotube is a one-dimensional nano material, and graphene sheet curls to form a seamless and hollow nanotube. It has a long axis and self-organize into a network-structured film.
Carbon nanotube films feature excellent electricity-to-heat conversion. It is light, thin, soft, and washable. It is an ideal material for heating wearable. However, the manufacturing techniques are so complex that it is only recently that the material is witnessing mass production.