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Ultrathin Gold Microelectrode Array using Polyelectrolyte Multilayers for Flexible and Transparent Electro‐Optical Neural Interfaces

Title
Ultrathin Gold Microelectrode Array using Polyelectrolyte Multilayers for Flexible and Transparent Electro‐Optical Neural Interfaces
Authors
Hong, WoongkiLee, Jee WoongKim, DuheeHwang, YujinLee, JunheeKim, JunilHong, NariKwon, Hyuk-JunJang, Jae EunPunga, Anna RostedtKang, Hongki
DGIST Authors
Hong, Woongki; Lee, Jee Woong; Kim, Duhee; Hwang, Yujin; Lee, Junhee; Kim, Junil; Hong, Nari; Kwon, Hyuk-JunJang, Jae Eun; Punga, Anna Rostedt; Kang, Hongki
Issue Date
2022-02
Citation
Advanced Functional Materials, 32(9), 2106493
Type
Article
Author Keywords
flexible electrodesmicroelectrode arraysneural interfacespolyelectrolytestransparent electrodes
Keywords
ELECTRODEFILMSELECTROPHYSIOLOGYADSORPTIONNANOWIRESSIGNALSSURFACE
ISSN
1616-301X
Abstract
Electro-optical neural interface technologies provide great potential and versatility in neuroscience research. High temporal resolution of electrical neural recording and high spatial resolution of optical neural interfacing such as calcium imaging or optogenetics complimentarily benefit the way information is accessed from neuronal networks. To develop a hybrid neural interface platform, it is necessary to build transparent, soft, flexible microelectrode arrays (MEAs) capable of measuring electrical signals without light-induced artifacts. In this work, flexible and transparent ultrathin (<10 nm) gold MEAs are developed using a biocompatible polyelectrolyte multilayer (PEM) metallic film nucleation-inducing seed layer. With the polymer seed layer, the thermally evaporated ultrathin gold film shows good conductivity while providing high optical transmittance and excellent mechanical flexibility. In addition, strong electrostatic interaction via the PEM alters the electrode-electrolyte interfaces, thereby reducing the electrode impedance and baseline noise level. With a simple modification of the fabrication process of the MEA using biocompatible materials, both excellent transmittance, and electrochemical interface characteristics are achieved, which is promising for efficient electro-optical neural interfaces. © 2021 Wiley-VCH GmbH
URI
http://hdl.handle.net/20.500.11750/15928
DOI
10.1002/adfm.202106493
Publisher
John Wiley & Sons Ltd.
Related Researcher
  • Author Jang, Jae Eun Advanced Electronic Devices Research Group(AEDRG) - Jang Lab.
  • Research Interests Nanoelectroinc device; 생체 신호 센싱 시스템 및 생체 모방 디바이스; 나노 통신 디바이스
Files:
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Collection:
Department of Electrical Engineering and Computer ScienceAdvanced Electronic Devices Research Group(AEDRG) - Kwon Lab.1. Journal Articles
Department of Electrical Engineering and Computer ScienceAdvanced Electronic Devices Research Group(AEDRG) - Jang Lab.1. Journal Articles
Department of Electrical Engineering and Computer ScienceAdvanced Electronic Devices Research Group(AEDRG) - Kang Lab.1. Journal Articles


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