Carbonaceous materials are a broad category of substances that are composed primarily of carbon atoms. They can be found in various forms, including natural materials such as coal, graphite, and diamonds, as well as synthetic materials such as carbon fiber and carbon nanotubes. These materials have a wide range of applications, including as fuel sources, structural materials, and in advanced technologies such as electronics and energy storage. Research in this area focuses on understanding the properties and behavior of carbonaceous materials, as well as developing new materials and technologies based on them.