Development and evaluation of Carbon-nanotube-bundle electrodes for neural interface

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Flexible, needle-shaped electrodes with the tip diameters of nano/micro-meter sizes were fabricated by assembling the bundles of carbon nanotubes (CNT), and their capabilities as neural electrodes were evaluated in physiological experiments with preparations of biological neurons and brain tissues. The experimental results demonstrated that the CNT-bundle electrodes we developed are useful as neuron-penetrating intracellular and brain-penetrating extracellular, stimulating/recording electrodes. These electrodes are unprecedented in the world, and may offer a new possibility for neural interface.