Laser-written Three-dimensional Microstructures Can Be Erased and Rewritten, if Desired
3D printing by direct laser writing produces micrometer-sized structures with precisely defined properties. Researchers of Karlsruhe Institute of Technology (KIT) have now developed a method to erase the ink used for 3D printing. In this way, the small structures of up to 100 nm in size can be erased and rewritten repeatedly. One nanometer corresponds to one millionth of a millimeter. This development opens up many new applications of 3D fabrication in biology or materials sciences, for instance.
Direct laser writing means that a computer-controlled, focused laser beam generates the structure in a photoresist similar to a pen. “Developing an ink that can be erased again was one of the big challenges in direct laser writing,” Professor Christopher Barner-Kowollik of KIT’s Institute for Chemical Technology and Polymer Chemistry says. The scientists have now met with success: They have developed an ink with reversible bonding, the building blocks of which can be separated from each other. The printed structure is simply erased by immersing it into a chemical solvent. At the point of erasure, a new structure can be written. In this way, the structure can be modified repeatedly.
The process was developed in close cooperation with the group of Professor Martin Wegener at the Institute of Applied Physics and the Institute of Nanotechnology of KIT. The physicists developed highly specialized 3D printers that produce scaffolds of up to 100 nm in size by direct laser writing.
“The ink with defined breaking points can be used for a variety of applications,” doctoral student and first author Markus Zieger says. Structures written with erasable ink can be integrated into structures made of non-erasable ink: Support constructions can be produced by 3D printing, which are similar to those used when building bridges and removed later on. It is also possible to further develop 3D designer petri dishes for use in biology. Recently, such structures were designed by KIT to grow cell cultures in three dimensions on the laboratory scale. “During cell growth, parts of the 3D microscaffold could be removed again to study how the cells react to the changed environment,” Martin Wegener explains. According to the scientists, it is also feasible to produce reversible wire bonds from erasable conducting structures in the future. A permanent ink can be mixed with a non-permanent ink to influence the properties of the printed material and make it more or less porous, for instance.
Learn more: Erasable Ink for 3D Printing
The Latest on: Erasable Ink for 3D Printing
- Aluminum-Tin Ink May Be Used for 3D Printing Replacement Parts on the ISSon July 2, 2019 at 1:19 am
In studying inks with composition that may have promise, the authors use a multi-material 3D printer on site at NASA Marshall Space Flight Center (MSFC). Aluminum-tin ink will be used on the ... […]
- Mimicking the ultrastructure of wood with 3D-printing for green productson June 27, 2019 at 12:22 am
(Nanowerk News) Researchers at Chalmers University of Technology, Sweden, have succeeded in 3D printing with a wood-based ink in a way that mimics the unique 'ultrastructure' of wood. Their research ... […]
- Researchers Develop Erasable Ink for 3D Printingon December 4, 2017 at 4:00 pm
KARLSRUHE, Germany, May 12, 2017 — Direct 3D laser printing or laser writing uses a computer-controlled focused laser beam to generate the structures. The process produces micrometer-sized objects ... […]
- Researchers Develop Erasable Ink for 3D Printingon May 11, 2017 at 5:00 pm
One approach to quantum technology is based on materials whose quantum properties can be accessed and controlled optically. In an initiative called the Scalable Rare Earth Ion Quantum Computing Nodes. ... […]
- Erasable ink developed for 3D printingon May 8, 2017 at 12:51 pm
Researchers have developed the first ever erasable ink for use with 3D printing. The aim was to come up with an ink suitable for 3D fabrication in biology or materials sciences. 3D printed ink serves ... […]
via Google News and Bing News