Rice Scientists Build World's First Single-molecule Car

Rice University scientists have constructed the world's smallest car -- a single molecule "nanocar" that contains a chassis, axles and four buckyball wheels.

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

"The synthesis and testing of nanocars and other molecular machines is providing critical insight in our investigations of bottom-up molecular manufacturing," said one of the two lead researchers, James M. Tour, the Chao Professor of Chemistry, professor of mechanical engineering and materials science and professor of 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. They're helping us learn the ground rules."

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. A human hair, by comparison, is about 80,000 nanometers in diameter.

Other research groups have created nanoscale objects that are shaped like automobiles, but study co-author Kevin F. Kelly, assistant professor of electrical and computer engineering, said Rice's vehicle is the first that actually functions like a car, rolling on four wheels in a direction perpendicular to its axles.

Kelly and his group, experts in scanning tunneling microscopy (STM), provided the measurements and experimental evidence that verified the rolling movement.

"It's fairly easy to build nanoscale objects that slide around on a surface," Kelly said. "Proving that we were rolling -- not slipping and sliding -- was one of the most difficult parts of this project."

To do that, Kelly and graduate student Andrew Osgood measured the movement of the nanocars across a gold surface. At room temperature, strong electrical bonds hold the buckyball wheels tightly against the gold, but heating to about 200 degrees Celsius frees them to roll. To prove that the cars were rolling rather than sliding, Kelly and Osgood took STM images every minute and watched the cars progress. Because nanocars' axles are slightly longer than the wheelbase -- the distance between axles -- they could determine the way the cars were oriented and whether they moved perpendicular to the axles.

In addition, Kelly's team found a way to grab the cars with an STM probe tip and pull them. Tests showed it was easier to drag the cars in the direction of wheel rotation than it was to pull them sideways.

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.

http://www.sciencedaily.com/releases/2005/...51021021040.htm

Wow.

Wow, is right! That's just mind boggling how small that really is.

Now THAT is trully impressive!

who cares?! lol unless i can fit my fat ass in it its just a microscopic toy

I wonder how long that would take to go 0-100?

It proves how small we can make mechanical things. This is 80 thousand times smaller than the tip of your hair... Very small!

It's small steps to bigger things such as molecular manufacturing where we can build anything we want at any time from raw materials. It would end poverty and change humanity forever. Everything would become inexpensive.

There's also the idea that we could build billions of nanobots in the future to patrol the body and enhance defense against viruses, bacteria, toxins etc.. Even protect from organ failure.

Building from the bottom up is the future of everything.

The first to build these kinds of Molecular manufacturing devices will be the most powerul country or person on this planet. Not just powerful.... but untouchable in every aspect.

Every year scientists are showing that things can be built at that scale. Molecular manufacturing might not happen but a lot think it's inevitible. Could be in 2010... could be by 2030. Looks like it will be sooner rather than later.

How many angstroms does it get on a molecule of gas?

And you thought the itch on your arm was a bug. No! It's a nano spy.

is this a new model from Mini ?

That is truly awesome! Any word on what other complex things they have ben constructing?

They were saying they have developed nano trucks since... Where the nano trucks can carry a payload. This will be useful in molecular manufacturing, I'll look for more info.

That is insane! Stuff like this really makes me believe that anything is possible.

Science is a great thing, and the human mind is on the borderline of amazing IMO.

What they can do with nanotechnology is truly amazing. And of course, we are at just the beginning. I have heard that there are both military and medical applications of nanotechnology, so the stage is set for continuing innovation.

what liter would this car be