Researchers advance nanoscale 3D printing with faster, higher fidelity method Researchers have developed a new approach to nanoscale 3D printing that improves both speed and fidelity, overcoming a challenge that has limited the technology's broader use in manufacturing. (Image: Georgia Tech)Nanoscale 3D printing allows researchers to create structures thousands of times smaller than the width of a human hair. "Many nanoscale 3D printing methods can produce very precise structures, but they are too slow for practical production," Kim said. Ultrafast and precise nanoscale 3D printing enabled by grayscale projection two-photon lithography (GP-TPL). “It felt immensely rewarding to discover a new way to overcome a long-standing limitation in projection-based nanoscale 3D printing.”