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Updated: Jul 16, 2025

Dissecting Mechanoenzymatic Properties of Processive Myosins with Ultrafast Force-Clamp Spectroscopy
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High performance mechano-optoelectronic molecular switch.

Zhenyu Yang1, Pierre-André Cazade2, Jin-Liang Lin1

  • 1Key Laboratory of Organic Optoelectronics, Department of Chemistry, Tsinghua University, Beijing, 100084, P.R. China.

Nature Communications
|September 13, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a new mechano-optoelectronic switching method using tetraphenylethylene molecules in self-assembled monolayers. This breakthrough enables efficient, reversible switching inside electronic devices, overcoming previous limitations.

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Nanotechnology

Background:

  • Molecular photoswitching is efficient ex-situ but limited in electronic devices due to excited state quenching.
  • Achieving reversible in-situ switching in devices requires overcoming background interactions.

Purpose of the Study:

  • To achieve fully reversible in-situ mechano-optoelectronic switching in electronic devices.
  • To leverage aggregation-induced emission (AIE) in tetraphenylethylene molecules for enhanced switching.
  • To explore the role of mechanical force and device architecture in molecular switching.

Main Methods:

  • Utilized self-assembled monolayers (SAMs) of tetraphenylethylene molecules.
  • Engineered device architecture by bending supporting electrodes to maximize AIE.
  • Employed multimodal characterization to analyze mechanically-controlled emission and conductance.

Main Results:

  • Demonstrated stable, reversible switching over >1600 on/off cycles.
  • Achieved a large on/off ratio of (3.8 ± 0.1) × 10^3 and a fast switching time of 140 ± 10 ms.
  • Observed UV-light enhanced Coulomb interactions leading to giant enhancement of molecular conductance.
  • Identified optimal concave architecture for reduced conformational entropy and enhanced supramolecular assembly.
  • Showcased potential for ultra-high switching ratios (10^5) with modified AIE-active molecules.

Conclusions:

  • Successfully demonstrated in-situ mechano-optoelectronic switching in SAMs by controlling molecular aggregation.
  • Established a novel approach for fast, reversible switching in soft electronics by integrating mechanical force and optics.
  • Highlighted the potential for advanced applications in responsive electronic materials and devices.