▎ 摘　　要

Graphene-based sheets are found to be excellent hair dyes. Graphene oxide (GO) and its reduced form r-GO can be used to create water-based formulations to form smooth and continuous coatings on hair. This not only avoids the use of toxic, small molecular ingredients in common hair dyes but also renders new properties of hair for enhanced comfort, such as greatly improved antistatic performance and heat dissipation. After drying, the graphene hair dyes can form a strongly adhering coating on hair surfaces, which can resist repetitive washing with shampoo, and thus reach the performance requirement of permanent hair dyes. The color of the GO coating can be gradually darkened or patterned to create the effect of gradient dyeing, and the lightness of the resulting r-GO-coating can be adjusted through the loading level to produce different shades.