Surface troubles begin with a wave of tiny bubbles - on hold

Rapid-fire photography reveals how even a nanoscale amount of surface roughness can unleash microbubbles that may interfere with coating technology. Understanding what happens to droplets when they splash down onto solid surfaces is important for applications ranging from ordinary spray painting to inkjet printed circuits. One challenge arises from the air cushion that is trapped underneath the drop during initial contact. Within a fraction of a second, this gas can be compressed and cause the droplet to rebound or adhere poorly to the target. A team led by Sigurdur Thoroddsen and his Ph.D. student Kenneth Langley at KAUST uncovered an air bubble breakup that may compromise the performance of droplet-derived coatings. Using cameras that film at 5 million frames per second, the team’s images show how thick bands of microbubbles appear when water droplets strike surfaces that are only a few nanometers away from being completely flat. To learn more about the havoc microbubbles can wreak, visit KAUST Discovery at: https://discovery.kaust.edu.sa/en/art...

Surface troubles begin with a wave of tiny bubbles - on hold researchers have extended the life of a human cell by
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