KIT Scientists Develop Method for the Specific Degradation of Laser-written Microstructures
3D printing by direct laser writing enables production of micro-meter-sized structures for many applications, from biomedicine to microelectronics to optical metamaterials. Researchers of Karlsruhe Institute of Technology (KIT) have now developed 3D inks that can be erased selectively. This allows specific degradation and reassembly of highly precise structures on the micrometer and nanometer scales. The new photoresists are presented in the journal Nature Communications (DOI: 10.1038/s41467-018-05234-0).
3D printing is gaining importance, as it allows for the efficient manufacture of complex geometries. A very promising method is direct laser writing: a computer-controlled focused laser beam acts as a pen and produces the desired structure in a photoresist. In this way, three-dimensional structures with details in the sub-micrometer range can be produced. “The high resolution is very attractive for applications requiring very precise filigree structures, such as in biomedicine, microfluidics, microelectronics or for optical metamaterials,” say Professor Christopher Barner-Kowollik, Head of the Macromolecular Architectures Group of KIT’s Institute for Chemical Technology and Polymer Chemistry (ITCP) and of the Soft Matter Materials Group of Queensland University of Technology (QUT) in Brisbane, Australia, and Dr. Eva Blasco of the ITCP of KIT. Over a year ago, KIT researchers already succeeded in expanding the possibilities of direct laser writing: the working groups of Professor Martin Wegener at the Institute of Applied Physics (APH) and the Institute of Nanotechnology (INT) of KIT and of Professor Christopher Barner-Kowollik developed an erasable ink for 3D printing. Thanks to reversible binding, the building blocks of the ink can be separated again.
Now, the scientists from Karlsruhe and Brisbane have largely refined their development. As reported in the journal Nature Communications, they have developed several inks, in different colors so to speak, that can be erased independently of each other. This enables selective and sequential degradation and reassembly of the laser-written microstructures. In case of highly complex constructions, for instance, temporary supports can be produced and removed again later on.
It may also be possible to add or remove parts to or from three-dimensional scaffolds for cell growth, the objective being to observe how the cells react to such changes. Moreover, the specifically erasable 3D inks allow for the exchange of damaged or worn parts in complex structures.
When producing the cleavable photoresists, the researchers were inspired by degradable biomaterials. The photoresists are based on silane compounds that can be cleaved easily. Silanes are silicon-hydrogen compounds. The scientists used specific atom substitution for preparing the photoresists. In this way, microstructures can be degraded specifically under mild conditions without structures with other material properties being damaged. This is the major advantage over formerly used erasable 3D inks. New photoresists also contain the monomer pentaerythritol triacrylate that significantly enhances writing without affecting cleavability.
Learn more: 3D Inks that Can Be Erased Selectively
The Latest on: 3D printing
[google_news title=”” keyword=”3D printing” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: 3D printing
- 3D Concrete Printing Market Size & Share to Surpass $40.652 Billion by 2028 | Vantage Market Researchon March 21, 2023 at 3:03 am
Global 3D Concrete Printing Market is valued at USD 310 Million in 2021 and is projected to reach a value of USD 40.652 Billion by 2028 at a CAGR (Compound Annual Growth Rate) of 106.5% over the ...
- 3D Printing Devices Market 2023 [New Report] Globally Expanding Industry Size, Share, Demand and Revenue till 2030 | 95 Pages Reporton March 21, 2023 at 1:54 am
The 3D Printing Devices Market (2023-2030) Latest Research Report provides comprehensive insights into the market, including various types [Metal Printing, Non-metal Printing] and applications ...
- Ceramic 3D Printing Market Major Players, Anlysis and Forecast till 2028on March 20, 2023 at 8:37 pm
The "Ceramic 3D Printing Market" Study Describes how the technology industry is evolving and how major and emerging ...
- Buy Online, Print Instantly at Home: The 3D Printing Startup Pioneering a New Way To Buy and Recieve Goodson March 20, 2023 at 11:20 am
DOS, a technology startup, is set to transform the manufacturing industry by creating the world's largest peer-to-peer (P2P) manufacturing network.
- DIY SLS 3D Printer Getting Ready To Printon March 19, 2023 at 5:00 pm
Ten years ago the concept of having on our desks an affordable 3D printer knocking out high quality reproducible prints, with sub-mm accuracy, in a wide range of colours and material properties ...
- 3D Printing 90° Overhangs With Non-Planar Slicingon March 18, 2023 at 5:01 pm
When slicing a model for 3D printing, the part is divided into a stack of flat, 2D layers. But there’s an alternative in the form of non-planar slicing, where the layers can follow 3D curves.
- Predictions for the Future of 3D Printingon March 16, 2023 at 5:00 pm
Let’s look at 3D printing through 2020 and going forward. Dave Veisz, VP of engineering at MakerBot offers a view of how 3D printing grew through the pandemic. Ric Fulop, CEO at Desktop Metal will ...
- $99,000 to build a house? 3D-printing company Icon announces affordable housing contest at SXSWon March 15, 2023 at 4:01 am
Austin-based Icon is launching Intitiave 99, an architecture design contest that challenges participants to design a house for under $99,000.
- What’s Ahead for 3D Printingon March 14, 2023 at 5:00 pm
Will we be calling the new year "2023D,” as 3D printing picks up its pace? It’s corny – but it could be fitting. It’s true that those of us who work in additive manufacturing (AM) say at the start of ...
- Best 3D Printing Services Of 2023on March 14, 2023 at 12:32 am
Commissions do not affect our editors' opinions or evaluations. The 3D printing industry is valued at more than $17 billion and it is expected to more than double that by 2026. There are many ...
via Bing News