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Go Speed Racer! Revving Up The World's Fastest Nanomotors

Date:
May 1, 2008
Source:
American Chemical Society
Summary:
In a "major step" toward a practical energy source for powering tomorrow's nanomachines, researchers report developing a new generation of sub-microscopic nanomotors that are up to 10 times more powerful than existing motors. The tiny motors, made of platinum and gold nanowires, are supercharged with carbon nanotubes. Go Speed Racer, go!
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Green lines show results of "racing," where images a, b, c, and d represent the tracks left by various types of speeding nanomotors. The winner is "c," a "catalytic nanomotor" composed of gold and platinum nanowires supercharged with carbon nanotubes.
Credit: Courtesy of the American Chemical Society

In a "major step" toward a practical energy source for powering tomorrow's nanomachines, researchers in Arizona report development of a new generation of sub-microscopic nanomotors that are up to 10 times more powerful than existing motors.

In the new study, Joseph Wang and colleagues point out that existing nanomotors, including so-called "catalytic nanomotors," are made with gold and platinum nanowires and use hydrogen peroxide fuel for self-propulsion. But these motors are too slow and inefficient for practical use, with top speeds of about 10 micrometers per second, the researchers say. One micrometer is about 1/25,000 of an inch or almost 100 times smaller than the width of a human hair.

Wang and colleagues supercharged their nanomotors by inserting carbon nanotubes into the platinum, thus boosting average speed to 60 micrometers per second. Spiking the hydrogen peroxide fuel with hydrazine (a type of rocket fuel) kicked up the speed still further, to 94- 200 micrometers per second. This innovation "offers great promise for self-powered nanoscale transport and delivery systems," the scientists state.

This study is scheduled for the May 27 issue of ACS Nano. 


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The above post is reprinted from materials provided by American Chemical Society. Note: Materials may be edited for content and length.


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American Chemical Society. "Go Speed Racer! Revving Up The World's Fastest Nanomotors." ScienceDaily. ScienceDaily, 1 May 2008. <www.sciencedaily.com/releases/2008/05/080501093520.htm>.
American Chemical Society. (2008, May 1). Go Speed Racer! Revving Up The World's Fastest Nanomotors. ScienceDaily. Retrieved July 29, 2015 from www.sciencedaily.com/releases/2008/05/080501093520.htm
American Chemical Society. "Go Speed Racer! Revving Up The World's Fastest Nanomotors." ScienceDaily. www.sciencedaily.com/releases/2008/05/080501093520.htm (accessed July 29, 2015).

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