3D Magnetic Microrobots

  • Author: Liam Critchley
  • Published: 18 March 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Small/Wiley-VCH
thumbnail image: 3D Magnetic Microrobots

Magnetic microrobots could be useful, e.g., for minimally invasive surgery, drug delivery, biopsies, and diagnostics. Two of the key properties that any microrobot needs to have before it can be used in a clinical trial are the ability to efficiently respond to an applied magnetic field and a high biocompatibility.

Sangwon Kim, Salvador Pané, ETH Zurich, Switzerland, Bradley J. Nelson, ETH Zurich, Daegu Gyeongbuk Institute of Science and Technology (DGIST), and DGIST‐ETH Microrobotics Research Center (DEMRC), both Daegu, South Korea, and colleagues have created magnetic 3D microrobots from iron. The researchers made the microrobots using a template-assisted electrodeposition method in 3D-printed micromolds. The electrolyte for the deposition process was an aqueous solution of FeSO47H2O, FeCl24H2O, and NH4Cl. The micromolds were fabricated from a photoresist (light-sensitive material) using a laser with a 780 nm wavelength.

The team fabricated iron-based microrollers (pictured right) and microswimmers (pictured left) which can achieve a motion speed of 20 body lengths per second. The microrobots can also perform 3D motions in viscous environments and can overcome higher flow viscosities compared to other 3D microswimmers. The microrobots were also found to have a good biocompatibility.


Article Views: 2130

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH