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Guided and magnetic self-assembly of tunable magnetoceptive gels

Author

Listed:
  • S. Tasoglu

    (Brigham and Women’s Hospital, Harvard Medical School
    Present address: Department of Mechanical Engineering, University of Connecticut, Storrs, Connecticut 06269, USA)

  • C.H. Yu

    (Brigham and Women’s Hospital, Harvard Medical School)

  • H.I. Gungordu

    (Brigham and Women’s Hospital, Harvard Medical School)

  • S. Guven

    (Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Canary Center at Stanford for Cancer Early Detection, Stanford School of Medicine)

  • T. Vural

    (Brigham and Women’s Hospital, Harvard Medical School)

  • U. Demirci

    (Brigham and Women’s Hospital, Harvard Medical School
    Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Canary Center at Stanford for Cancer Early Detection, Stanford School of Medicine)

Abstract

Self-assembly of components into complex functional patterns at microscale is common in nature, and used increasingly in numerous disciplines such as optoelectronics, microfabrication, sensors, tissue engineering and computation. Here, we describe the use of stable radicals to guide the self-assembly of magnetically tunable gels, which we call ‘magnetoceptive’ materials at the scale of hundreds of microns to a millimeter, each can be programmed by shape and composition, into heterogeneous complex structures. Using paramagnetism of free radicals as a driving mechanism, complex heterogeneous structures are built in the magnetic field generated by permanent magnets. The overall magnetic signature of final structure is erased via an antioxidant vitamin E, subsequent to guided self-assembly. We demonstrate unique capabilities of radicals and antioxidants in fabrication of soft systems with heterogeneity in material properties, such as porosity, elastic modulus and mass density; then in bottom-up tissue engineering and finally, levitational and selective assembly of microcomponents.

Suggested Citation

  • S. Tasoglu & C.H. Yu & H.I. Gungordu & S. Guven & T. Vural & U. Demirci, 2014. "Guided and magnetic self-assembly of tunable magnetoceptive gels," Nature Communications, Nature, vol. 5(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5702
    DOI: 10.1038/ncomms5702
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