Abstract
A novel carbon nanotubes/porous-network carbon micron tubes/silk fibroin (CPS) composite film neural electrode was presented and characterized. This electrode was fabricated through assembling dispersed carbon nanotubes (CNTs) by phytic acid onto the porous silk fibroin film. Afterward, the silk fibroin around the CNTs was carbonized by laser irradiation, producing porous-network carbon microtubes with good conductivity and biological compatibility. The structure of the CPS composite film was characterized by scanning electron microscopy and Raman spectroscopy. Cyclic voltammetry, electrochemical impedance spectroscopy, and safe charge injection limit (Qinj) of the CPS electrode were also measured by the three-electrode system, and the results exhibited outstanding electrochemical properties with the achieved Qinj of 5.7 mC/cm2. This work provides a promising approach for the preparation of a long-term implanted neural electrode with high charge injection ability and good biocompatibility.
Highlights
The treatment of central nervous system diseases has been a worldwide problem
As the link between the implantable neural prosthesis and the bioneural network, the neural electrodes are of critical importance in the performance of neuroprosthetics
The neural electrode based on the mechanism of a double-layer capacitor does not have electrochemical reactions in the process of charge transfer, which is beneficial to the stability of scitation.org/journal/adv the electrode when used, but the charge capacity of the double-layer capacitor is generally not high, and the charge stimulation threshold is low
Summary
The treatment of central nervous system diseases has been a worldwide problem. The most widely used treatment is drugs, but the effects are limited.[1]. Construction and electrochemical properties determination of carbon nanotubes/porous-network carbon micron tubes/silk fibroin composite film neural electrode
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