Tag: shrinking-down

MilliDelta robot surgeon is the size of a one cent coin

Another tiny robot is gearing up to join the ranks of microsurgeons , but this one is small enough to fit in your coin purse. Inspired by pop-up books and origami, the milliDelta bot measures mere millimetres when unfolded (roughly the size of a one cent coin). But, even at that scale, the miniature helper packs flexible joints and bending, piezoelectric actuators that allow it to work with force, precision, and high speed. Its creators (from Harvard’s Wyss Institute for Biologically Inspired Engineering and the John A. Paulson School of Engineering and Applied Sciences) claim it can perform a range of microsurgery and manufacturing tasks in compact spaces. Unlike existing Delta robots, which scientists have been shrinking down for workspace use for years, the new bot is a swift operator. “Currently available Delta robots are only able to operate at a few hertz, ” said Hayley McClintock, a Harvard researcher who helped design the device. “So for our robot to be able to draw circles at frequencies up to 75 Hz is quite impressive.” Scientists developed the new bot using a technique known as pop-up microelectromechanical systems (MEMS), allowing them to create a complex structure from flat pieces of materials. The same approach was used to create the flying RoboBee . Next up for the milliDelta bot, the researchers plan to refine its specs in order to pin down its final design and add power and control electronics. Source: ScienceRobotics

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MilliDelta robot surgeon is the size of a one cent coin

Researchers push Moore’s Law with a 1-nanometer transistor gate

Ready for some hardcore science about transistor elements that are a fraction of the width of a human hair? Good, because that’s what this post is all about. “The semiconductor industry has long assumed that any gate below 5 nanometers wouldn’t work, so anything below that was not even considered, ” University of California at Berkeley researcher Sujai Desay says. In recent years, though, that assertion has looked shaky, and now it’s been thoroughly disproved thanks to the discoveries made by scientists at UC Berkeley and the magic of carbon nanotubes . Or, as they’re more commonly known, graphene. Ali Javey, Jeff Bokor, Chenming Hu, Moon Kim and H.S. Philip Wong crafted a transistor with a 1-nanometer gate. In theory this could shrink the weight and size of our already-thin electronics even more. For context, current silicon transistors have 20-nanometer gates. However, it’s worth noting that graphene isn’t the only material in use here. The UCB researchers also used molybdenum disulfide (MoS2) to achieve this result. A problem with using anything but silicon for these ultra-small transistors is that with anything under 5nm in size, it gets harder to control the flow of electrons through the material, and the transistors can’t be powered off. But since electrons are “heavier” when they’re pushed through MoS2, smaller gate lengths can be used. Hence shrinking down to 1nm. Now, it’s important to note that while this is a huge discovery, it isn’t precisely the first time for achievement the way that UCB says it is. Back in 2008 , researchers from the University of Manchester used graphene to create a transistor 1nm across containing only a few carbon rings. And in 2006, Korean scientists used FinFET to make a transistor with a 3nm channel length. So maybe relax, because it looks the reports of Moore’s Law’s demise have been slightly exaggerated or at least delayed. Via: Reddit Source: University of California Berkeley , Science

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Researchers push Moore’s Law with a 1-nanometer transistor gate