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Nature of Charge
Published on 2009-07-25 15:05:00
The concept of electrical charge existed long before our knowledge of why it works. You walk across the floor and get a spark from the door knob, your socks stick to your sweater in the dryer, or the screen of the computer attracts dust. These type of effects were known to the Phoenicians as long ago as 800 BC, but even to this day we are not totally sure of why it happens.Our study of ELECTROSTATICS tries to give the best possible explanation for why these “electrical “ phenomena occur.
Droplets move to microfluidic chamber music
Published on 2009-07-25 15:04:00
In principle, setting a droplet in motion inside a microfluidic channel is straightforward: Apply pressure and the liquid flows. In practice, however, precise control of droplet flow simultaneously along multiple channels is technically challenging; conventional pressure pumps are not feasible for microfluidic systems. Inspired by the potential of finely tunable acoustic-pressure generators, a group of engineers at the University of Michigan set out to control droplet motion with music. First, t
Nanotube growth caught on camera
Published on 2009-07-25 15:03:00
23 July 2009French and US researchers have produced the first video evidence that carbon nanotubes turn as they grow. Their films, showing atoms being added in a regular pattern at the growing tip of a nanotube, like bricks to a round tower, support the so-called theoretical screw-dislocation-like (SDL) model of carbon nanotube growth.Most groups trying to observe how nanotubes grow currently use transmission electron microscopy (TEM) methods. But Stephen Purcell and colleagues at the University
