Developers at Laser Zentrum Hanover (LZH, Germany) are using their two-photon polymerization system to create 100-200 nm structures. The idea is similar to rapid prototyping, but in 3D rather than building with 2D layers. Twin laser beams, generating femtosecond laser pulses focused at the same point in a liquid resin, sweeping through three dimensions, form the nanostructures or microstructures. Two-photon polymerization solidifies the resin at the localized focus area.
George Leopold's talk at last week's Design & Manufacturing Minneapolis helped restore astronaut and engineer Gus Grissom's role in the beginnings of NASA, and outlined how Grissom played a pivotal role in winning the Space Race.
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