| Aug 09, 2024 |
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(Nanowerk Information) Microalgae such because the diatom Odontella aurita and the inexperienced alga Tetraselmis striata are particularly appropriate as “biofactories” for the manufacturing of sustainable supplies for 3D laser printing because of their excessive content material in lipids and photoactive pigments. A global analysis group led by Prof. Dr Eva Blasco, a scientist on the Institute for Molecular Programs Engineering and Superior Supplies (IMSEAM) of Heidelberg College, has succeeded for the primary time in manufacturing inks for printing advanced biocompatible 3D microstructures from the uncooked supplies extracted from the microalgae. The microalgae-based supplies could possibly be utilized in future as the idea for implants or scaffolds for 3D cell cultures.
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The analysis has been revealed in Superior Supplies (“Printing Inexperienced: Microalgae-Based mostly Supplies for 3D Printing with Mild”).
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| A brand new ink system, primarily based on the microalgae Odontella aurita and Tetraselmis striata, permits the manufacturing of advanced 3D microstructures with prime quality and precision. (Picture: Clara Vazquez-Martel)
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Among the many additive manufacturing methods, two-photon 3D laser printing provides specific benefits for manufacturing on the micro- and nanoscale. Owing to its exceptional decision, it finds software in quite a few fields together with optics and photonics, microfluidics, and biomedicine. The method entails focusing a laser beam on a liquid, photoreactive resin, a so-called “ink”. At the point of interest, the laser mild prompts particular molecules often known as photoinitiators and triggers a chemical response, inflicting native solidification of the ink.
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So far, petrochemical-based polymers have been primarily used as inks for this extremely exact 3D laser printing course of. Nevertheless, these polymers contribute to the depletion of fossil fuels and the emission of greenhouse gases and also can comprise poisonous elements, as Prof. Blasco factors out. Microalgae are notably nicely suited as “biofactories” for the manufacturing of sustainable supplies for 3D printing because of their speedy progress charge, CO2-fixation throughout cultivation, and biocompatibility.
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“Regardless of their benefits, microalgae have hardly been thought of as uncooked supplies for light-based 3D printing,” says Prof. Blasco, whose group conducts analysis on the interface of macromolecular chemistry, supplies science, and 3D nanofabrication.
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The analysis group succeeded for the primary time in extracting biocompatible supplies for high-resolution 3D laser printing from microalgae. For his or her experiments, the researchers chosen two species – the diatom Odontella aurita and the inexperienced alga Tetraselmis striata – that comprise notably excessive ranges of lipids within the type of triglycerides. The group extracted the triglycerides and functionalized them with acrylates to facilitate speedy curing underneath mild irradiation. The photoactive inexperienced pigments current within the microalgae proved to be appropriate as photoinitiators. When uncovered to mild, they set off the chemical response that solidifies the ink right into a three-dimensional construction.
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“On this manner we keep away from utilizing doubtlessly poisonous components just like the photoinitiators utilized in standard inks,” explains first writer Clara Vazquez-Martel, a doctoral candidate in Eva Blasco’s analysis group at IMSEAM.
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Utilizing the brand new ink system, the researchers had been in a position to produce totally different 3D microstructures with excessive precision, exhibiting advanced options similar to overhanging roofs and cavities. Utilizing cell tradition experiments, the researchers additionally investigated the biocompatibility of the microalgae-based inks. They ready 3D microscaffolds on which the cells had been cultured for about 24 hours. They noticed a survival charge of virtually one hundred pc.
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“Our outcomes open up new prospects not just for extra sustainable 3D printing with mild, but additionally for all times science purposes – from 3D cell cultures to biocompatible implants,” says Prof. Blasco.
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