Scientists in Texas are reporting the development of a "nanodragster" that may speed the course toward development of a new generation of futuristic molecular machines. The vehicle — only 1/50,000th the width of a human hair — resembles a hot-rod in shape and can outperform previous nano-sized vehicles. Their report is in ACS' Organic Letters , a bi-weekly journal.
James Tour, Kevin Kelly and colleagues note that the ability to control the motion of small molecules is essential for building much-anticipated molecular machines. Some of these machines may find use in manufacturing computer circuits and other electronic components in the future. Scientists have already made strides by designing nano-sized vehicles, including a "nanocar" with wheels made of buckyballs — spheres of carbon containing 60 atoms apiece. The car can scoot around a gold surface when exposed to heat or an electric field gradient. But control of its movement is limited. These drawbacks prevent its widespread use. But the most limiting factor is the nanoscopic resolution tools available for studying their range of motions and capabilities.
The new vehicle addresses some of these problems. The front end has a smaller axle and wheels made of special materials that roll easier. The rear wheels sport a longer axle but are still made of buckyballs, which provide strong surface grip. These changes result in a "nanodragster" that can operate at lower temperatures than a regular nanocar and possibly has has better agility, paving the way for better molecular machines, the scientists say.
ARTICLE FOR IMMEDIATE RELEASE
"Molecular Machinery: Synthesis of a 'Nanodragster'"
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http://pubs.acs.org/doi/full/10.1021/ol902312m
CONTACT:
James Tour, Ph.D.
Department of Mechanical Engineering and Materials Science
The R.E. Smalley Institute for Nanoscale Science
and Technology
Rice University
Houston, Texas 77005
Phone: 713-348-6246
Fax: 713-348-6250
Email: tour@rice.edu
Kevin Kelly, Ph.D.
Department of Electrical and Computer Engineering
Rice University
Houston, Texas 77005
Phone: 713-348-3565
Email: kkelly@rice.edu
Organic Letters