Kwon Ik Soo, Kim Young Jo, Klosterman Luke, Forssell Mats, Fedder Gary K, Bettinger Christopher J
Department of Materials Science and Engineering, Carnegie Mellon University 5000 Forbes Ave, Pittsburgh, PA 15213 (USA).
Department of Electrical and Computer Engineering, Carnegie Mellon University 5000 Forbes Ave, Pittsburgh, PA 15213 (USA).
J Mater Chem B. 2016;4(18):3031-3036. doi: 10.1039/C5TB02618K. Epub 2016 Feb 23.
The properties of redox active polydopamine melanin (PDM) films as a coating material for neural electrodes were evaluated. PDM films with nanometer-scale thicknesses exhibit dc bias dependent charge injection capacities (CIC) with maximum values of 110 ± 23 µC cm at 0.2V (vs Ag/AgCl) and reduce the interfacial impedance compared to inorganic conducting films. PDM films exhibited an asymmetric impedance response to positive and negative dc biases with minimum interfacial impedance at 0.2V (vs Ag/AgCl). An explanation for the observed bias-dependent electrochemical behavior is presented.
评估了氧化还原活性聚多巴胺黑色素（PDM）薄膜作为神经电极涂层材料的性能。具有纳米级厚度的PDM薄膜表现出与直流偏压相关的电荷注入容量（CIC），在0.2V（相对于Ag/AgCl）时最大值为110±23μC/cm，并且与无机导电薄膜相比降低了界面阻抗。PDM薄膜对正负直流偏压表现出不对称的阻抗响应，在0.2V（相对于Ag/AgCl）时具有最小界面阻抗。给出了观察到的偏压依赖性电化学行为的解释。
