Scientists build a single molecule nanocar

Oct. 20, 2005 at 8:51 PM
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HOUSTON, Oct. 20 (UPI) -- Rice University scientists have built the world's smallest car -- a single molecule "nanocar" containing a chassis, axles and four wheels.

"The synthesis and testing of nanocars and other molecular machines is providing critical insight in our investigations of bottom-up molecular manufacturing," said co-lead researcher James Tour, a professor of mechanical engineering, materials science and computer science. "We'd eventually like to move objects and do work in a controlled fashion on the molecular scale, and these vehicles are great test beds for that."

The nanocar consists of a chassis and axles made of well-defined organic groups with pivoting suspension and freely rotating axles. The wheels are buckyballs -- spheres of pure carbon containing 60 atoms apiece. The entire car measures just 3-4 nanometers across, making it slightly wider than a strand of DNA.

Other researchers have created nanoscale objects shaped like cars, but co-author Kevin Kelly, assistant professor of electrical and computer engineering, said Rice's vehicle is the first to roll on four wheels in a direction perpendicular to its axles.

The "nanocar" is described in an online research paper and due to appear in a future issue of the journal Nano Letters.

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