Soft ionic liquid based resistive memory characteristics in a two terminal discrete polydimethylsiloxane cylindrical microchannel

Abstract

This paper proposes a novel soft ionic liquid (IL) electrically functional device that displays resistive memory characteristics using poly(acrylic acid) partial sodium salt (PAA-Na⁺:H₂O) solution gel and sodium hydroxide (NaOH) in a thin polydimethylsiloxane (PDMS) cylindrical microchannel. The proposed device was designed to operate on the principle of ion concentration polarization. Current–voltage (I–V) characteristics were observed at ±1.5 V with a high-resistance state R_off of ∼453035.965 Ω and low-resistance state R_on of ∼2248.237 Ω at a read voltage of 0.15 V, i.e., with an R_off/R_on ratio of ∼201.507, for 500 cycles and a retention time of 10⁴ s. This ionic-liquid-based soft memory device is expected to pave the way for the development of fluid-based logic circuits for modern electronic applications.