A high-performance transparent graphene/vertically aligned carbon nanotube (VACNT) hybrid electrode for neural interfacing

Du Won Jeong, Gook Hwa Kim, Na Yeon Kim, Zonghoon Lee, Sang Don Jung, Jeong O. Lee

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Neural interfaces that do not damage cells or tissues are key to connecting brain functions to neural prosthetics. Here, we designed a transparent graphene/vertically aligned carbon nanotube (VACNT) electrode capable of extracellularly recording spontaneous action potentials in Sprague-Dawley rat primary cortex neurons. Graphene provided the dual function of contacting the VACNTs and visually monitoring the cell viability. The hybrid electrodes exhibited remarkably high peak-to-peak signal amplitudes (1600 μV) and low noise levels, presumably due to tight junction formation between the cells and the deformed CNTs. Spike simulation and high-resolution transmission electron microscopy (HRTEM) imaging confirmed the excellent interfacial characteristics of the cells and the transparent hybrid electrodes.

Original languageEnglish
Pages (from-to)3273-3281
Number of pages9
JournalRSC Advances
Volume7
Issue number6
DOIs
StatePublished - 2017
Externally publishedYes

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