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Related Experiment Video

Updated: Dec 7, 2025

Author Spotlight: Improving the Production of Self-Assembling Fibers and Peptide Hydrogels for Superior Biocompatibility
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Accessing Highly Tunable Nanostructured Hydrogels in a Short Ionic Complementary Peptide Sequence via pH Trigger.

Harsimran Kaur1, Pooja Sharma1, Nidhi Patel1

  • 1Habitat Centre, Institute of Nano Science and Technology, Sector 64, Phase 10, Mohali, Punjab 160062, India.

Langmuir : the ACS Journal of Surfaces and Colloids
|September 29, 2020
PubMed
Summary
This summary is machine-generated.

Researchers tuned peptide amphiphile self-assembly using pH to create diverse nanostructures. This pH-responsive hydrogel, with tunable properties, shows potential as a biomaterial and cell culture scaffold.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Biomaterials Engineering

Background:

  • Controlling nanostructure formation from single gelators is crucial for advanced materials.
  • Peptide amphiphiles offer tunable properties for self-assembly applications.
  • pH modulation is an effective strategy to influence self-assembly pathways.

Purpose of the Study:

  • To investigate the effect of pH on the self-assembly of a novel peptide amphiphile.
  • To create diverse nanostructures from a single gelator by controlling pH.
  • To explore the potential of pH-responsive hydrogels as biomaterials.

Main Methods:

  • Synthesis of a peptide amphiphile (FEFK-Nap) with ionic complementary residues and a naphthoxyacetic acid group.
  • pH-dependent self-assembly studies to form hydrogels across a wide pH range (2.0-12.0).
  • Nanoscale structural characterization and mechanical property assessment of the resulting hydrogels.

Main Results:

  • The peptide amphiphile formed hydrogels over a broad pH range (2.0-12.0), exhibiting pH-responsive behavior.
  • Diverse nanostructures, including thin fibers at extreme pH and thicker fibers near physiological pH, were observed.
  • Significant variations in mechanical strength correlated with nanoscale structural changes due to pH-induced charge modulation.

Conclusions:

  • pH modulation provides an elegant strategy to control the self-assembly of ionic complementary peptide amphiphiles.
  • Diverse nanostructures with tunable properties can be accessed from a single gelator system.
  • The pH-responsive hydrogel, particularly at physiological pH, shows promise for applications in cell culture scaffolds and stimuli-responsive biomaterials.