3D Indy: Nano Racecar
• This model of an Indy Car, about the width of a human hair, was made in 4 minutes using a 3D printer. Printing three dimensional objects at a nanoscale with incredibly fine details is now possible using two-photon lithography. Scientists at Vienna University of Technology have broken the record for speed printing, going from a few mm/sec to 5 m/sec! This is done using precisely controlled mirrors to focus a laser beam on printed resin. Because the resin hardens only when activated by 2 photons of light, at the very center of the laser beam, solid material can be created anywhere in the liquid resin instead of only at the surface. Potential applications include making scaffolds to build human tissue or body parts.
• Meanwhile, at this weekend’s Grand Prix races, real life Indy Cars will roar through downtown Baltimore, looping through 2 miles of familiar city streets at speeds >175 miles per hour. (I drive the same streets at a slightly more sedate pace on my way to work every day.) This uniquely urban track includes 12 turns over 200 bolted-down manhole covers in the heart of a 300 year old city, past the picturesque Inner Harbor along the Chesapeake Bay. Watch what happens when Tony Kanann’s breaks fail at 180 mph during last year’s Grand Prix in Baltimore. Amazingly, the drivers walk away unscathed. Tony Kanaan and Helio Crash at Baltimore
• Watch the high speed printing of a nanorace car by a 3D printer: High speed fabrication of race car
#sciencesunday for ScienceSunday curated this week by Allison Sekuler and three guest curators: Buddhini Samarasinghe , Rich Pollett and Gail Barnes .