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Optical Control of Living Cells Electrical Activity by Conjugated Polymers
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Stimuli-Responsive Genetically Engineered Polymer Hydrogel Demonstrates Emergent Optical Responses.

Eva Rose M Balog1, Koushik Ghosh2, Young-Il Park3

  • 1Center for Integrated Nanotechnologies, Materials Physics and Applications Division, ⊥C-PCS, Chemistry Division, #MST-7, Materials Science and Technology Division, and △Institute for Materials Science, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States.

ACS Biomaterials Science & Engineering
|January 20, 2021
PubMed
Summary

Stimuli-responsive optical hydrogels were created using elastin-like polymers (ELPs) and an oligomer (OPPV). These biocompatible materials show unique pH- and temperature-dependent fluorescence, useful for flexible photonics and bioimaging.

Keywords:
composite materialconjugated oligomergenetically encodedoptically active materialphotoluminescencepolymeric materialstimuli-responsive material

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Optoelectronics

Background:

  • Biopolymer-based optical hydrogels are promising for advanced applications.
  • Stimuli-responsive materials offer tunable properties.
  • Elastin-like polymers (ELPs) provide a biocompatible scaffold.

Purpose of the Study:

  • To synthesize and characterize stimuli-responsive hydrogels.
  • To investigate the optical properties of composite hydrogels.
  • To explore the potential of ELP/oligomer hydrogels for optoelectronic and bioimaging applications.

Main Methods:

  • Synthesis of three-dimensional hydrogels from genetically engineered ELPs.
  • Loading hydrogels with an amine-containing p-phenylenevinylene oligomer (OPPV) derivative.
  • Characterization of pH- and temperature-dependent fluorescence emission.

Main Results:

  • Composite ELP/OPPV hydrogels exhibited pH- and temperature-dependent fluorescence.
  • A unique optical behavior of OPPV was observed within the hydrogel environment.
  • This behavior is attributed to local electronic effects from ELP microenvironment interactions.

Conclusions:

  • ELP/OPPV hydrogels display unique, environmentally sensitive optical properties.
  • The observed optical behavior is influenced by the hydrogel's hydrophobic microenvironment.
  • These findings support the development of novel biocompatible optical materials.