Laser Technique Writes Graphene Patterns on Most Surfaces

Laser-induced graphene (LIG) has been used to write graphene patterns onto food and other materials to quickly embed conductive identification tags and sensors into the products themselves. The method previously was used to make graphene foam with a commercial laser to transform the top layer of an inexpensive polymer film. The foam consists of microscopic, cross-linked flakes of graphene, the two-dimensional form of carbon.