E-Mail IMAGE: A color map illustrates the inherent colors of 466 types of carbon nanotubes with unique (n,m) designations based their chiral angle and diameter. view more Credit: Image courtesy of Kauppinen Group/Aalto University Nanomaterials researchers in Finland, the United States and China have created a colour atlas for 466 unique varieties of single-walled carbon nanotubes. The nanotube colour atlas is detailed in a study in Advanced Materials about a new method to predict the specific colors of thin films made by combining any of the 466 varieties. The research was conducted by researchers from Aalto University in Finland, Rice University and Peking University in China.