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ACS omega
Nov 07, 2023;8 (44): 41495-41501.

Wide-Range Synaptic Current Responses with a Liquid Ga Electrode via a Surface Redox Reaction in a NaOH Solution at Different Molar Concentrations.

Dahee Seo, Seongyeon Kang, Heejoong Ryou, Myunghun Shin, Wan Sik Hwang
Author Information
  1. Dahee Seo: Department of Materials Science and Engineering, Korea Aerospace University, Goyang 10540, Republic of Korea.
  2. Seongyeon Kang: Department of Materials Science and Engineering, Korea Aerospace University, Goyang 10540, Republic of Korea.
  3. Heejoong Ryou: Department of Materials Science and Engineering, Korea Aerospace University, Goyang 10540, Republic of Korea.
  4. Myunghun Shin: School of Electronics and Information Engineering, Korea Aerospace University, Goyang 10540, Republic of Korea.
  5. Wan Sik Hwang: Department of Materials Science and Engineering, Korea Aerospace University, Goyang 10540, Republic of Korea. ORCID
PMID: 37970006 DOI: 10.1021/acsomega.3c05352

Abstract

A liquid Ga-based synaptic device with two-terminal electrodes is demonstrated in NaOH solutions at 50 °C. The proposed electrochemical redox device using the liquid Ga electrode in the NaOH solution can emulate various biological synapses that require different decay constants. The device exhibits a wide range of current decay times from 60 to 320 ms at different NaOH mole concentrations from 0.2 to 1.6 M. This research marks a step forward in the development of flexible and biocompatible neuromorphic devices that can be utilized for a range of applications where different synaptic strengths are required lasting from a few milliseconds to seconds.

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Journal Article

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