In-situ electro-responsive through-space coupling enabling foldamers as volatile memory elements

Jinshi Li, Pingchuan Shen, Zeyan Zhuang, Junqi Wu, Ben Zhong Tang and Zujin Zhao ()
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Jinshi Li: South China University of Technology
Pingchuan Shen: South China University of Technology
Zeyan Zhuang: South China University of Technology
Junqi Wu: South China University of Technology
Ben Zhong Tang: The Chinese University of Hong Kong
Zujin Zhao: South China University of Technology

Nature Communications, 2023, vol. 14, issue 1, 1-13

Abstract: Abstract Voltage-gated processing units are fundamental components for non-von Neumann architectures like memristor and electric synapses, on which nanoscale molecular electronics have possessed great potentials. Here, tailored foldamers with furan‒benzene stacking (f-Fu) and thiophene‒benzene stacking (f-Th) are designed to decipher electro-responsive through-space interaction, which achieve volatile memory behaviors via quantum interference switching in single-molecule junctions. f-Fu exhibits volatile turn-on feature while f-Th performs stochastic turn-off feature with low voltages as 0.2 V. The weakened orbital through-space mixing induced by electro-polarization dominates stacking malposition and quantum interference switching. f-Fu possesses higher switching probability and faster responsive time, while f-Th suffers incomplete switching and longer responsive time. High switching ratios of up to 91 for f-Fu is realized by electrochemical gating. These findings provide evidence and interpretation of the electro-responsiveness of non-covalent interaction at single-molecule level and offer design strategies of molecular non-von Neumann architectures like true random number generator.

Date: 2023
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DOI: 10.1038/s41467-023-42028-5

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