Jul 28, 2025
Artfight attack on @desisthegame!!! They drew Mags and Yoopie so i drew Mags and Yoopie but in Modern AU/ my Observatory AU!!!
THE OUPPIES
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Artfight attack on @desisthegame!!! They drew Mags and Yoopie so i drew Mags and Yoopie but in Modern AU/ my Observatory AU!!!
THE OUPPIES
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Lining Up
Just as fastidious gardeners might erect a trellis to guide their plants, tissue engineers build microscopic scaffolds to support and steer cell development. To overcome the challenges of precise construction at tiny scales, researchers have been experimenting with imbuing the materials with magnetic properties, which might mean the pieces could be aligned by an external magnetic field. A new study aimed to develop a form of injectable 3D hydrogel (a material that supports cell growth), with rod-shaped microgels containing magnetic nanoparticles. The nanoparticles, made of an iron oxide called maghemite, let researchers create a carefully aligned structure of rods (red in the video, with both parallel and perpendicular arrangements) over which mouse fibroblasts (connective tissue, green and blue) can grow. Tweaking the magnetic field strength or orientation enabled control over the scaffold setup, highlighting the potential of this approach for steering the growth of cells for regeneration and repair.
Written by Anthony Lewis
Video from work by Dominik L. Braunmiller and colleagues
Institute of Physical Chemistry, RWTH Aachen University, Aachen, Germany
Video originally published with a Creative Commons Attribution 4.0 International (CC BY 4.0)
Published in Advanced Functional Materials, September 2022
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Maghemite (γ-Fe2O3) Fiber-in-tube And Tube-in-tube Nanostructures
Inspired by the nanowire-in-microtube structure, Jian-guo Guan and colleagues proposed a facile and effective nonequilibrium heat-treatment approach combined with electrospinning for fabrication of maghemite (γ-Fe2O3) fiber-in-tube and tube-in-tube nanostructures. The precursor was composed of PVP and iron citrate. Fig. 5.21 shows SEM images and corresponding TEM images of as-obtained γ-Fe2O3 fiber-in-tube and tube-in-tube fibers. The figure reveals that the tips of the inner structures are totally separated from the outer tube, and the inner and outer tubes have a closed end. The resultant γ-Fe2O3 fiber-in-tube and tube-in-tube nanostructures may have important applications in a number of fields, such as magnetic separable catalysts or catalyst-supporting materials, sensors, absorbents, microreactors, and so forth, because of their structural characteristics and good magnetic properties. This method can intentionally control the contraction direction of the precursor nanofibers during the heat-treatment process by adjusting only heating rate (R) of the calcination, as R can be easily utilized to tune the temperature gradient established in
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