Mechanically Tissue-Like and Highly Conductive Au Nanoparticles Embedded Elastomeric Fiber Electrodes of Brain–Machine Interfaces for Chronic In Vivo Brain Neural Recording

Chihyeong Won; Ui-Jin Jeong; Sanghyeon LeeMinkyu LeeChaebeen KwonSungjoon ChoKukro YoonSeungmin LeeDongwon ChunIl-Joo ChoTaeyoon Lee

首页> 外文期刊>Advanced functional materials >Mechanically Tissue-Like and Highly Conductive Au Nanoparticles Embedded Elastomeric Fiber Electrodes of Brain–Machine Interfaces for Chronic In Vivo Brain Neural Recording

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Mechanically Tissue-Like and Highly Conductive Au Nanoparticles Embedded Elastomeric Fiber Electrodes of Brain–Machine Interfaces for Chronic In Vivo Brain Neural Recording

机译：Mechanically Tissue-Like and Highly Conductive Au Nanoparticles Embedded Elastomeric Fiber Electrodes of Brain–Machine Interfaces for Chronic In Vivo Brain Neural Recording

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Implantable neural probes are a crucial part of brain–machine interfaces thatserve as direct interacting routes between neural tissues and machines. Theneural probes require both mechanical and electrical properties to acquirehigh-quality signals from individual neurons with minimal tissue damage.However, overcoming the trade-off between flexibility and electrical property isstill challenging. Herein, a fiber neural probe, composed of core polymer andAu nanoparticles (AuNPs) on the outer shell, is fabricated by absorbing Au precursorfollowing in situ chemical reduction with a variation of percolating andleaching time. The proposed fiber exhibits excellent electrical properties, withan electrical conductivity of 7.68 × 104 S m~(?1) and an impedance of 2.88 × 10~3 Ωat 1 kHz, as well as a Young’s modulus of 170 kPa, which is comparable to thatof brain tissue (≈100 kPa). Additionally, the AuNPs fiber neural probe demonstratesextremely stable in vivo electrophysiological signal recordings for fourmonths with reduced foreign body responses at the tissue–probe interface. Furthermore,this innovative approach encourages a new paradigm of long-termrecording in the fields of neuroscience and engineering to better understandbrain circuits, develop bioelectronic devices, and treat chronic disorders.

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《Advanced functional materials》 |2022年第52期|2205145.1-2205145.11|共11页
作者
Chihyeong Won; Ui-Jin Jeong; Sanghyeon LeeMinkyu LeeChaebeen KwonSungjoon ChoKukro YoonSeungmin LeeDongwon ChunIl-Joo ChoTaeyoon Lee;
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作者单位

School of Electrical and Electronic EngineeringYonsei University50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea;

Brain Science InstituteKorea Institute of Science and Technology (KIST)5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea;

KIURI InstituteYonsei University50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of KoreaAdvanced Analysis CenterKorea Institute of Science and Technology (KIST)5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of KoreaDepartment of Biomedical SciencesCollege of MedicineKorea University73 Goryeodae-ro, Seongbuk-gu, Seoul 02841, Republic of Korea,Department of AnatomyCollege of MedicineKorea University73 Goryeodae-ro, Seongbuk-gu, Seoul 02841, Republic of KoreaSchool of Electrical and Electronic EngineeringYonsei University50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea,Brain Science InstituteKorea Institute of Science and Technology (KIST)5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Ko;

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正文语种英语
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bioelectronics; brain chips; brain–machine interfaces; fiber neural probes; stretchable electronics;

Mechanically Tissue-Like and Highly Conductive Au Nanoparticles Embedded Elastomeric Fiber Electrodes of Brain–Machine Interfaces for Chronic In Vivo Brain Neural Recording

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