Rice Scientists Build World's First Single-molecule Car

This is really cool:

"Synthesis of the nanocars also produced major challenges. Tour's research group spent almost eight years perfecting the techniques used to make them. Much of the delay involved finding a way to attach the buckyball wheels without destroying the rest of the car. Palladium was used as a catalyst in the formation of the axle and chassis, and buckyballs had a tendency to shut down the palladium reactions, so finding the right method to attach the wheels involved a good bit of trial and error.

The Rice team has already followed up the nanocar work by designing a light-driven nanocar and a nanotruck that's capable of carrying a payload."