Molecular switching by proton-coupled electron transport drives giant negative differential resistance

To develop new types of dynamic molecular devices with atomic-scale control over electronic function, new types of molecular switches are needed with time-dependent switching probabilities. We report such a molecular switch based on proton-coupled electron transfer (PCET) reaction with giant hysteri...

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Bibliographic Details
Published in:Nature communications 2024-09, Vol.15 (1), p.8300-9, Article 8300
Main Authors: Zhang, Qian, Wang, Yulong, Nickle, Cameron, Zhang, Ziyu, Leoncini, Andrea, Qi, Dong-Chen, Sotthewes, Kai, Borrini, Alessandro, Zandvliet, Harold J. W., del Barco, Enrique, Thompson, Damien, Nijhuis, Christian A.
Format: Article
Language:English
Subjects:
119/118
639/638/542/970
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639/925/927/998
Artificial neural networks
Chemistry
Electrodes
Electron transfer
Electron transport
Electrons
Energy
Humanities and Social Sciences
Humidity
Isotope effect
Modulation
Molecular machines
multidisciplinary
Nanotechnology
Neural networks
Oxidation
Physics
Protons
Ratios
Relative humidity
Science
Science (multidisciplinary)
Switches
Time dependence
Voltage sweep rate
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Summary:To develop new types of dynamic molecular devices with atomic-scale control over electronic function, new types of molecular switches are needed with time-dependent switching probabilities. We report such a molecular switch based on proton-coupled electron transfer (PCET) reaction with giant hysteric negative differential resistance (NDR) with peak-to-valley ratios of 120 ± 6.6 and memory on/off ratios of (2.4 ± 0.6) × 10 3 . The switching dynamics probabilities are modulated by bias voltage sweep rate and can also be controlled by pH and relative humidity, confirmed by kinetic isotope effect measurements. The demonstrated dynamical and environment-specific modulation of giant NDR and memory effects provide new opportunities for bioelectronics and artificial neural networks. It is a challenge to develop molecular switches with time-dependent probabilities. Here, the authors present a molecular switch based on proton-coupled electron transfer reaction with demonstration of dynamical and environment-specific modulation of giant negative differential resistance and memory effects.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-024-52496-y