There are so many ways to categorize materials. Sometimes, they are classified based on an aspect of size such as with nanomaterials. Sometimes they are categorized based on a genre of applications such as biomaterials. Sometimes materials are so unique, they are in a category on their own. Check out these videos on a variety of materials.   

Shu Yang Lab, University of Pennsylvania

Kate Stebe Lab, University of Pennsylvania

Kevin Turner Lab, University of Pennsylvania

Lee Bassett Lab, University of Pennsylvania

Lee Bassett Lab, University of Pennsylvania