A breakthrough in 3D printing lasting just 20 seconds carries the exact type of complication that science enjoys.

      The process can produce intricate microstructures much quicker than certain laser methods, although complete 3D control is still under development.

      University of Utah’s Menon Lab

      A 3D printer capable of constructing a structure in roughly 20 seconds may sound like an exaggerated lab claim. However, the innovation is concrete. The challenge arises before anyone starts to fantasize about instant replacement parts.

      Researchers at the University of Utah have showcased a holographic 3D printing method that solidifies tiny structures in a single exposure, rather than assembling them layer by layer. This one-step technique could prevent the weak and leaky seams that layered printing sometimes produces. However, at this stage, it serves as a tool for microstructures rather than a quick method for printing any object imagined.

      How one shot replaces layers

      This approach takes cues from photolithography but extends it to thicker materials. A mask with a nanopattern is placed in front of the laser, manipulating the light before it enters the printing material.

      Menon Lab, University of Utah

      The material in use is SU-8, a substrate whose polymer strands become solid upon exposure to laser light. Once the targeted volume is set, the unexposed material can be washed away. Instead of tracing shapes slice by slice, the system solidifies the entire useful structure simultaneously.

      Where the limitation shows up

      The breakthrough is narrower than what 3D printing generally implies. The printer can adjust the length and width of a pattern and then extend that pattern vertically. This capability makes it powerful but still restricted.

      This limitation accounts for the fact that initial demonstrations have focused on microtubule arrays and lattice formations, rather than small desktop decorations. The technique is suitable for detailed designs that need to span a thick volume. Objects necessitating varying geometries at different depths will still require a more adaptable version of the technology.

      3D Printer Unsplash

      What this could print next

      The practical version of this technology is unlikely to resemble a typical home 3D printer. Instead, it appears more akin to a manufacturing tool for tiny components where internal structures perform essential functions.

      The printed microtubules have been tested for liquid movement through capillary action and resistance under compression. This indicates a focus on lab-scale structures where small details must withstand substantial forces. The next step is evident: researchers need to translate a swift extended-2D method into genuine 3D control without compromising the 20-second efficiency.

      Paulo Vargas is an English major transitioned into a reporter and then into a technical writer, with a career that has consistently returned to…

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