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Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
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Three-Dimensional Printing of Self-Assembled Dipeptides.

Jihyuk Yang1, Mojun Chen1, Heekwon Lee1

  • 1Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China.

ACS Applied Materials & Interfaces
|April 26, 2021
PubMed
Summary

Researchers developed a novel 3D printing method for creating freeform, crystalline diphenylalanine (FF) peptide structures. This technique enables precise control over self-assembly, paving the way for advanced bioelectronic devices.

Keywords:
3D printingdipeptidesdiphenylalaninepiezoelectricityself-assembly

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Area of Science:

  • Materials Science
  • Biotechnology
  • Nanotechnology

Background:

  • Peptide-based materials offer programmable properties for nanobiodevices.
  • Molecular self-assembly is key for peptide crystalline structures.
  • Freeform shaping of self-assembled peptide structures remains a significant challenge.

Purpose of the Study:

  • To fabricate freeform, crystalline diphenylalanine (FF) peptide structures.
  • To combine meniscus-guided 3D printing with molecular self-assembly.
  • To explore the potential of these structures in bioelectronic devices.

Main Methods:

  • Meniscus-guided 3D printing combined with molecular self-assembly.
  • Mild thermal activation with precise build platform temperature control.
  • Layer-by-layer printing with high spatial resolution (2 μm laterally, 200 nm vertically).

Main Results:

  • Successful fabrication of freeform, crystalline FF peptide structures.
  • Demonstration of layer-by-layer crystalline 3D printing.
  • Observation of piezoelectricity in 3D-printed FF due to its crystalline nature.

Conclusions:

  • The developed technique overcomes design restrictions for self-assembled organic materials.
  • 3D-printed FF peptide structures exhibit piezoelectricity, suitable for bioelectronic applications.
  • This approach enables the creation of functional devices from self-assembled peptide materials without design limitations.