Journal
RSC ADVANCES
Volume 7, Issue 6, Pages 3273-3281Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra26836f
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Funding
- Creative Fusion Research Program through the Creative Allied Project - National Research Council of Science Technology [CAP-12-1-KIST]
- Electronics & Telecommunications Research Institute [16ZH1210]
- UNIST(Ulsan National Institute of Science Technology) [1.150114.01]
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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 mu V) 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.
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