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Enhancement of Interface Characteristics of Neural Probe Based on Graphene, ZnO Nanowires, and Conducting Polymer PEDOT

Title
Enhancement of Interface Characteristics of Neural Probe Based on Graphene, ZnO Nanowires, and Conducting Polymer PEDOT
Authors
Ryu, MingyuYang, Jae HoonAhn, YumiSim, MinkyungLee, Kyung HwaKim, KyungsooLee, TaejuYoo, Seung-JunKim, So YeunMoon, CheilJe, MinkyuChoi, Ji-WoongLee, YounguJang, Jae Eun
DGIST Authors
Yang, Jae Hoon; Ahn, Yumi; Sim, Minkyung; Lee, Kyung Hwa; Kim, Kyungsoo; Yoo, Seung-Jun; Kim, So Yeun; Moon, CheilChoi, Ji-WoongLee, YounguJang, Jae Eun
Issue Date
2017-03-29
Citation
ACS Applied Materials and Interfaces, 9(12), 10577-10586
Type
Article
Article Type
Article
Keywords
3,4 EthylenedioxythiopheneBiocompatibilityBrain Machine InterfaceBrain TissueBrain Computer InterfaceBrain Machine InterfaceCarbon NanotubesCellsConducting PolymersElectrical CharacteristicElectrochemical DepositionElectrodesElectrodesGrapheneGrapheneHistologyIn VivoInterface CharacteristicNanowiresNanowiresNeural ProbeNeural ProbesNeural Signal RecordingPEDOTPoly(3,4 Ethylenedioxythiophene) (PEDOT)ProbesReactive Tissue ResponseSignal to Noise RatioSilicon Microelectrode ArraysStimulationTissueTransportZinc Oxide (ZnO)
ISSN
1944-8244
Abstract
In the growing field of brain-machine interface (BMI), the interface between electrodes and neural tissues plays an important role in the recording and stimulation of neural signals. To minimize tissue damage while retaining high sensitivity, a flexible and a smaller electrode with low impedance is required. However, it is a major challenge to reduce electrode size while retaining the conductive characteristics of the electrode. In addition, the mechanical mismatch between stiff electrodes and soft tissues creates damaging reactive tissue responses. Here, we demonstrate a neural probe structure based on graphene, ZnO nanowires, and conducting polymer that provides flexibility and low impedance performance. A hybrid Au and graphene structure was utilized to achieve both flexibility and good conductivity. Using ZnO nanowires to increase the effective surface area drastically decreased the impedance value and enhanced the signal-to-noise ratio (SNR). A poly[3,4-ethylenedioxythiophene] (PEDOT) coating on the neural probe improved the electrical characteristics of the electrode while providing better biocompatibility. In vivo neural signal recordings showed that our neural probe can detect clearer signals. © 2017 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/4210
DOI
10.1021/acsami.7b02975
Publisher
American Chemical Society
Related Researcher
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Collection:
Energy Science and EngineeringOrganic & Printed Electronics Laboratory(OPEL)1. Journal Articles
Information and Communication EngineeringCSP(Communication and Signal Processing) Lab1. Journal Articles
Brain and Cognitive SciencesMoon Lab1. Journal Articles


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