The super properties of graphene

In 2010, Andre Geim and Konstantin Novoselov at the University of Manchester won the Nobel Prize in Physics. They had discovered something truly remarkable: a material that is stronger the steel, super conductive, transparent and able to make extremely fast super computers in the future. They discovered “Graphene”. In this video, Associate Professor of Mechanical Engineering & Materials Science at Yale Dr. Ainissa Ramirez shows us what it is, how it works, and even how it was made. With the right patience you could, at least in theory, make your own graphene by only using a pencil and sticky tape! Although you probably need an atomic force microscope in order to make sure it really worked…ooh well…

This is one of many interesting videos in a series called “Material Marvels” that you can watch on Yale University’s YouTube channel.

Tin pest (Catastrophic collapse at lower temperature)

In this video, Dr. Ainissa Ramirez from Yale University talks about how tin objects can be completely destroyed by simply getting to cold. Temperature can have a serious impact on materials properties in general, but this is an extreme case. When pure tin gets to cold, it seems to destroy itself and leave a pile of gray dust behind. This phenomenon is called “Tin pest” and was a serious problem back in the day when many objects was made from it. But we also use a lot of tin in today’s products, all electronics are soldered using a metals containing tin for example. Now days the tin is mixed with other metals in order to avoid this problem, but it’s not foolproof. So if you want to make something out of tin, make sure it can stand the temperature.

To learn more about tin and tin pest, please visit en.wikipedia.org/wiki/Tin