Stochastic Computing via In Operando Modulation of Rectification in Molecular Tunneling Junctions

21 August 2020, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


This paper describes the reconfiguration of molecular tunneling junctions during operation via the self-assembly of bilayers of glycol ethers. We use well-established functional groups to modulate the magnitude and direction of rectification in assembled tunneling junctions by exposing them to solutions containing different glycol ethers. Variable-temperature measurements establish that rectification occurs by a bias-dependent tunneling-hopping mechanism and that glycol ethers, beside being an unusually efficient tunneling medium, behave identically to alkanes. We fabricated memory bits from crossbar junctions prepared by injecting eutectic Ga-In into microfluidic channels. Two 8-bit registers were able to perform logical AND operations on bit strings encoded into chemical packets as microfluidic droplets that alter the composition of the crossbar junctions through self-assembly to effect memristor-like properties. This proof of concept work demonstrates the potential for fieldable molecular-electronic devices based on tunneling junctions of self-assembled monolayers and bilayers.


molecular electronics
reconfigurable self-assemby
in operando
molecular diode

Supplementary materials

Stochastic computing via in operando modulation of rectification in molecular tunneling junction SI XinkaiQiu ChiechiLab 20200821


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