Vertically aligned carbon nanofiber (CNF) arrays, particularly when coated with a polypyrrole film, show well-defined electrical properties with extremely low impedance. The polymer film also serves as a biomaterial (with great freedom of chemical and biological modification) for cell/tissue engineering to create an intimate subcellular electrical–neural interface, which is desirable for implantable biomedical devices. The Figure shows a single PC12 neural cell (green) spanning collagen-coated CNF microbundles.
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Nguyen-Vu et al. (2005) studied this question.
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