polydimethylsiloxane
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TBCP-II tank robot climbs walls with gecko-inspired feet (video)
Taking a cue from nature and perhaps Geico, researchers at Simon Fraser University Burnaby have created a gecko-inspired robot, the Timeless Belt Climbing Platform (TBCP-II), capable of climbing smooth walls or across ceilings with lizard-like foot pads. The feet, made out of fibrillar adhesive polydimethylsiloxane (PDMS), act as grip thanks to a small mushroom cap design 17 micrometers wide and 10 micrometers high for maximum surface exposure. The 240g tank-like machine is also somewhat independent, using sensors to detect its surroundings to change course based on obstacles in its way, taking us one step closer to... the inevitable. Check out the video and full PR after the break.
Self-strengthening polymer nanocomposite works best under pressure
No one keeps carbon nanotubes down -- especially not these guys. The always popular allotropes have been enlisted by researchers at Rice University to create a composite material that gets stronger under pressure. When combined with polydimethylsiloxane, a rubbery polymer, the tubes form a nanocomposite that exhibits self-strengthening properties also exhibited in bones. During testing, the team found the material increased in stiffness by 12 percent after 3.5 million compressions. Apparently, the crew is stumped on why it reacts this way, but is no less eager to see it working in the real world -- discussion is already underway to use the stuff as artificial cartilage. And here we thought aerogel was cool. Full PR after the break.
Researchers devise thermally-activated flexible display
The race to create bigger smaller and better flexible displays now has yet another participant, but Weijia Wen and colleagues at the Hong Kong University of Science and Technology are putting a toasty twist on their iteration. The team has reportedly developed a "flexible, thermally-activated electronic display made from a mixture of metal nanoparticles and plastic," which costs far less than most similar alternatives to create and measures just 150-microns in thickness. Moreover, these units are able to change hues based on the surrounding temperatures, and while only fixed patterns are available for viewing at the moment, the crew hopes to implement an array of "thermal pixels" in the future for more dynamic opportunities. A display that warns you of an overheating machine / battery / toy -- who woulda thunk it?[Thanks, Alan]
