The 3D printer uses a liquid resin, which is hardened at precisely the correct spots by a focused laser beam. The focal point of the laser beam is guided through the resin by movable mirrors and leaves behind a hardened line of solid polymer, just a few hundred nanometers wide. This fine resolution enables the creation of intricately structured sculptures as tiny as a grain of sand. "Until now, this technique used to be quite slow", says Professor Jürgen Stampfl from the Institute of Materials Science and Technology at the TU Vienna. "The printing speed used to be measured in millimeters per second – our device can do five meters in one second." In two-photon lithography, this is a world record. Article
posted by curious nu
on Mar 12, 2012 -
The re-invention of silk
"For a millennium, traders brought silk fabrics from the Far East along the Silk Road to Europe, where the beautiful yet tough material was fashioned into dazzling clothes. Today bioengineers (video interview)
are infusing the natural protein fibers spun by silkworms with enzymes and semiconductors. They are processing the modified strands under varying temperature, shear and acidic conditions to create novel materials
with remarkable properties."
posted by dhruva
on Mar 8, 2011 -
I want to be injected with respirocytes.
They're little mechanical devices that do the same job as your red blood cells, but they're 236 times more efficient.
This is one of the coolest things I've seen in a long time, and could certainly be very useful. Among the examples they give for people who could benefit are firefighters (too much smoke? just hold your breath!), deep sea divers (tune the respirocytes to remove N2, and no more long decompression times), and choking victims (this one should be obvious).
posted by CrayDrygu
on Sep 27, 2000 -