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Flexible Light Sources.

Masaki Sekino1

  • 1Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan. sekino@bee.t.u-tokyo.ac.jp.

Advances in Experimental Medicine and Biology
|January 5, 2021
PubMed
Summary
This summary is machine-generated.

Soft, flexible light sources are crucial for optogenetics to avoid damaging nerve tissue. Organic LEDs offer a promising solution for creating advanced optical stimulation devices with minimal invasiveness.

Keywords:
Flexible electronicsLight sourceOptogeneticsOrganic light-emitting diodeThin-film device

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Materials Science

Background:

  • Optical stimulation is key in optogenetics, but light penetration in tissue is limited.
  • Rigid light sources cause mechanical stimulation, leading to inflammation and impaired neural activity.
  • Soft materials are needed to prevent mechanical stress and biological reactions like inflammation.

Purpose of the Study:

  • To introduce technologies for manufacturing soft light sources for optogenetics.
  • To showcase examples of optical stimulation devices utilizing these soft light sources.

Main Methods:

  • Minimizing light source size (e.g., micro-light emitting diodes [LEDs]) and mounting on flexible substrates.
  • Utilizing organic semiconductors for fabricating soft, flexible light-emitting devices.
  • Developing manufacturing techniques for these novel soft light sources.

Main Results:

  • Soft devices prevent mechanical stimulation, mitigating inflammation and encapsulation in neural tissues.
  • Micro-LEDs can be miniaturized for minimally invasive insertion into living tissue.
  • Organic LEDs enable wide-area flexible light-emitting surfaces, offering superior flexibility over inorganic semiconductors.

Conclusions:

  • Soft light sources are essential for safe and effective optical stimulation in optogenetics.
  • Organic LEDs represent the next generation of light sources for flexible, wide-area applications.
  • The development of these technologies facilitates advanced, less invasive neural stimulation devices.