"Exploring Materials - Ferrofluid" is a hands-on activity demonstrating that a material can act differently when it's nanometer-sized. Visitors investigate the properties of ferrofluid and magnetic black sand, learning that the surprising difference in the behavior of these two materials is due to size.
This is an optical microscope image of a liquid crystal (Cromlyn in water). The colors are created by molecular variations or changes in the crystal's thickness.
Liquid crystals have properties of both liquids and solids: Although they can flow like a fluid, their molecules are highly ordered, like those found in solid crystals. The ubiquitous liquid crystal displays (LCDs) found in everything from watches to cell phones are made possible by devices that rapidly alter the structure of these substances—and therefore the way they interact with light.
Inside Science TV produced by the American Institute of Physics features videos on nanotechnology including: Nanotech Material Protects Against Most Liquids