Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Erasable ink for 3-D printing

03.05.2017

Laser-written three-dimensional microstructures can be erased and rewritten, if desired -- very important paper publication in Angewandte Chemie

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.


3-dimensional microstructures can be written using a laser, erased, and rewritten.

Photo: KIT

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.

The new process is presented in the renowned journal Angewandte Chemie under the heading "Cleaving Direct Laser Written Microstructures on Demand." The reviewers rated this publication a "very important paper." 3D printing already is indispensable in many fabrication areas. Its importance is increasing. "According to estimations, some 10 percent of all goods will be produced by 3D printing in 2030," Barner-Kowollik and Wegener say.

###

Markus M. Zieger, Patrick Mueller, Alexander S. Quick, Martin Wegener, Christopher Barner-Kowollik: Cleaving Direct Laser Written Microstructures on Demand. Angewandte Chemie 2017, 129, 1-6; DOI: 10.1002/anie.201701593

Karlsruhe Institute of Technology (KIT) pools its three core tasks of research, higher education, and innovation in a mission. With about 9,300 employees and 25,000 students, KIT is one of the big institutions of research and higher education in natural sciences and engineering in Europe.

KIT - The Research University in the Helmholtz Association

afr, 24.04.2017

For further information, please contact:

Kosta Schinarakis
Themenscout
Tel.: +49 721 608-41956
Fax: +49 721 608-43568
E-Mail:schinarakis@kit.edu

Media Contact

Monika Landgraf
presse@kit.edu
49-721-608-47414

 @KITKarlsruhe

http://www.kit.edu/index.php 

Monika Landgraf | EurekAlert!

More articles from Life Sciences:

nachricht Could this protein protect people against coronary artery disease?
17.11.2017 | University of North Carolina Health Care

nachricht Microbial resident enables beetles to feed on a leafy diet
17.11.2017 | Max-Planck-Institut für chemische Ökologie

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

NASA detects solar flare pulses at Sun and Earth

17.11.2017 | Physics and Astronomy

NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures

17.11.2017 | Health and Medicine

The importance of biodiversity in forests could increase due to climate change

17.11.2017 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>