Some of you may have already come across this, because it's making big news. But researchers at Argonne National Laboratory have developed what they are calling 'self-assembled colloidal asters.' You can check out the abstract here, but the full article is available by subscription only. These colloidal asters are essentially little micro-robots. They are manipulated with a magnetic field and can perform simple tasks as a cohesive group of colloid particles. If you're interested, I recommend reading Wired Science's article on this, which also includes some pretty cool videos of the little dudes in action.
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