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Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation
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Strain Sensor via Wood Anomalies in 2D Dielectric Array.

Rashid G Bikbaev1,2, Ivan V Timofeev1,2, Vasiliy F Shabanov1

  • 1Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia.

Nanomaterials (Basel, Switzerland)
|April 30, 2021
PubMed
Summary

This study introduces a bioinspired optical sensor using dielectric nanodisks that mimics plant structures. The sensor effectively detects strain by splitting optical modes, offering a sensitive and linearly calibrated strain-sensing device.

Keywords:
Wood anomaliesbioinspired structuredielectric arraystrain sensor

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Area of Science:

  • Photonics and Materials Science
  • Biomimetic Nanotechnology
  • Optical Sensing

Background:

  • All-dielectric photonic materials offer promising applications in optical sensing.
  • Bioinspired designs can leverage natural structures for advanced functionalities.
  • Understanding collective optical modes is crucial for sensor development.

Purpose of the Study:

  • To investigate the strain-responsive spectral properties of a bioinspired optical sensor.
  • To mimic the optical behavior of grana lamellae using dielectric nanodisks.
  • To explore the potential of collective optical modes for strain detection.

Main Methods:

  • Analytical and numerical studies were conducted on a 2D periodic array of dielectric nanodisks.
  • The sensor design mimics the grana lamellae structure found in chloroplasts.
  • The study analyzed the splitting of collective optical modes under mechanical strain.

Main Results:

  • A bioinspired sensor exhibits strain-responsive spectral properties.
  • The collective optical mode, analogous to Wood's anomaly, shows persistence against disorder.
  • Mode splitting into polarized modes under strain allows for accurate frequency difference detection.
  • The sensor demonstrates a sensitivity of 5 nm/% with a nearly linear strain calibration.

Conclusions:

  • The developed bioinspired sensor is effective for strain detection.
  • The adaptive optical phenomenon can be utilized in biomimetic optical nanomaterials.
  • The sensor's high sensitivity and linear response facilitate practical applications.