Nanotechnology is the study of materials and devices at the nano scale, or about 1000th the width of a human hair. People get really excited about nanotech, because materials display unique properties at the nano scale, and can be integrated into a wide variety of products. People are really excited, because nanotech has applications for things like super-strong materials, and TVs that can be folded up and put into your pocket. Strangely enough, though, no applications for iPod Nanos.