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Home > Press > Go Speed Racer! Revving up the world’s fastest nanomotors

Nanomotor racing: 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. Courtesy of the American Chemical Society.
Nanomotor racing: 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. Courtesy of the American Chemical Society.

Abstract:
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. Their study is scheduled for the May 27 issue of ACS Nano, a monthly journal.

Go Speed Racer! Revving up the world’s fastest nanomotors

Washington, DC | Posted on May 1st, 2008

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.

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About American Chemical Society (ACS)
The American Chemical Society — the world’s largest scientific society — is a nonprofit organization chartered by the U.S. Congress and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.

— Mark T. Sampson

News media may obtain a full text of this report (“Carbon-Nanotube-Induced Acceleration of Catalytic Nanomotors”) in ACS Nano by contacting Michael Bernstein.

Contacts:
Michael Bernstein
202-872-4400

Copyright © American Chemical Society

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