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Thread: Miscellaneous

  1. #11

    Discovering the micro/nano world

    Published on Apr 11, 2016

    One of the first classes to offer undergraduates a hands-on experience with cutting-edge micro/nano engineering, 2.674 incorporates the latest technology, inspiring students to the possibilities of a whole new field.

  2. #12

    Nanotubes assemble! Rice introduces Teslaphoresis

    Published on Apr 14, 2016

    Carbon nanotubes in a dish assemble themselves into a nanowire in seconds under the influence of a custom-built Tesla coil created by scientists at Rice University.

    But the scientists don't limit their aspirations for the phenomenon they call Teslaphoresis to simple nanowires.

    The team led by Rice research scientist Paul Cherukuri sees its invention as setting a path toward the assembly of matter from the bottom up on nano and macro scales.

    There are even hints of a tractor beam effect in watching an assembled nanowire being pulled toward the coil.

  3. #13

    Crash testing bacteria at 670 mph

    Published on May 23, 2016

    BYU chemists have discovered that bacteria can survive impacts at incredible speeds. Smashing into a solid wall at 670 miles per hour doesn’t even leave a mark. BYU Chemistry professor Daniel Austin and his graduate students are learning just how hard it can be to kill bacteria.The research group, funded by NASA, is studying high velocity impact of bacterial spores. More specifically, the group is trying to find the speed limit above which bacteria won’t survive when they crash into a hard surface.

    “There should be a velocity at which they’ll splat and die, but we haven’t reached it,” Austin said. “We can get pretty close to the speed of sound, and we’re planning to go to higher velocities in the near future, but it’s not easy to do.” To test velocity, bacteria are loaded into a vacuum chamber and then launched by a blast of air at speeds nearing 300 meters per second.

    The group’s recently published study in Planetary and Space Science is the first of its kind to test the impact survivability rate of bare bacteria.

    Although the main focus of the research is answering the question of how much force the bacteria can withstand, NASA has funded the research because of the planetary protection implications of the study: if bacteria can survive the ejection from one planet and the impact of landing on another planet, there are potential concerns about cross contamination of bacteria between those planets. However, Austin is quick to acknowledgethat there are other factors, like UV light, that may kill the bacteria in transition.

    Even though the initial publication’s lead authors Brandon Barney and Sara Pratt have graduated, Austin continues to mentor current students as they develop the research. The group is now collaborating with Microbiology professor Richard Robison as they continue the quest for higher impact speeds. They anticipate that blasting bacteria at one kilometer per second (more than 2,200 miles per hour) should be more than enough to kill the bacteria, but the group hasn’t yet been able to create those speeds in the lab.

    “We seem so frequently surprised at what bacteria can survive, and this just adds to the list,” Austin said. “Our understanding of the limits of life have expanded a lot since the 1970s as we find bacteria surviving and even thriving under extreme conditions.”

    In testing the limits of bacteria, Austin’s team has additionally observed an unusual elasticity of the bacterial spores, which may have potential applications in nanotechnology.
    "Crash Testing Bacteria: BYU Chemists Try to Find Fatal Limit"
    Research team discovers bacteria can survive impacts at incredible speeds

    by Natalie Tripp
    May 23, 2016

  4. #14

    Caterpillar soft robot powered by light

    Published on Aug 19, 2016

    Using Liquid Crystalline Elastomers (LCEs), researchers created a bioinspired soft robot. The 15-millimeter long micro-robot harvests and is controlled by spatially modulated green laser beam to mimic caterpillar locomotion.
    Article "Researchers unveil light-powered caterpillar robot"
    Most robots use complex electric or pneumatic actuators to enact motion.

    by Brooks Hays
    August 18, 2016

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