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October 2nd, 2007

Nanotechnology monorail cargo shuttles

Abstract:
Shuttles - whether the space shuttle, an airport shuttle bus, or a loom shuttle - basically do one thing: they transport cargo (astronauts, passengers, thread) from one point to another on a controlled route. Although not always called shuttles, the basic concept is critical to modern transportation systems and is used by nearly every society. The concept of the shuttle has been used for centuries from Egyptian barges to Roman railways and canals. Even before these inventions, however, nature employed molecular shuttles in biological organisms. In molecular shuttles, kinesin proteins propel cargo (such as organelles) along hollow tubes called microtubules. Cells use these motors to transport cargo to highly specific destinations, in order to regulate levels of macromolecules and processes, much like a train along a track. Using biological motors to transport and precisely distribute cargo requires a clear understanding of how molecular shuttles pick up and deliver specific payload. However, scientists are challenged by the need to better control the interactions along the route so that the cargo remains on the line when not needed, but when it is needed, can be picked up and transported to a specific location. Researchers in Switzerland have now built nanoscale cargo loading stations and shuttles, an important step towards assembly lines for nanotechnology.

Source:
nanowerk.com

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