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Binding-Free Taste Visualization with Plasmonic Metasurfaces.

JuHyeong Lee1, Doeun Kim1, Gyurin Kim1

  • 1School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea.

ACS Applied Materials & Interfaces
|March 20, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel binding-free plasmonic metasurface for rapid molecular taste sensing. This innovative artificial photonic tongue can distinguish basic tastes, mixtures, and other flavors without complex protocols.

Keywords:
metasurfacemolecular sensingphotonic tongueplasmonicstaste visualization

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Area of Science:

  • Photonics
  • Plasmonics
  • Sensory Science

Background:

  • Artificial photonic tongues offer intuitive taste discrimination but are limited by complex, taste-specific binding protocols.
  • Existing methods restrict the applicability of photonic taste sensors to a narrow range of molecules.

Purpose of the Study:

  • To introduce a "binding-free" approach for molecular taste sensing using plasmonics.
  • To eliminate the need for physical or chemical binding protocols in taste detection.

Main Methods:

  • Development of a wafer-scale plasmonic metasurface by scalable coating of metallic nanoparticles onto a metallic mirror.
  • Detection of molecular refractive indices and surface tensions via 2D projection optical images of liquid droplets containing taste molecules.
  • Utilizing the metasurface to visualize and distinguish between five basic tastes, mixtures, spicy, and alcoholic tastes.

Main Results:

  • Demonstration of a binding-free plasmonic metasurface for taste sensing.
  • Successful visualization and distinction of basic tastes, mixtures, spicy, and alcoholic tastes.
  • Elimination of complex binding protocols required for traditional artificial tongues.

Conclusions:

  • The developed plasmonic metasurface offers an intuitive and rapid approach to molecular taste sensing.
  • This technology has the potential to establish a user-friendly and portable taste-sensing platform.
  • The binding-free method broadens the applicability of photonic taste sensors.