Objective. Neural interfaces based on carbon fiber (CF) electrodes have demonstrated key positive attributes such as minimal foreign body response and mechanical strength to self-insert in brain tissue. However, carbon does not form a low impedance electrode interface with neural tissue. Electrodeposited platinum iridium (PtIr) has been used to improve electrode interface properties for metallic bioelectrodes. Approach. In this study, a PtIr electrodeposition process has been performed on CF microelectrode arrays to improve the interfacial properties of these arrays. We study the film morphology and composition as well as electrode durability and impedance. Results. A PtIr coating with a composition of 70% Pt, 30% Ir and a thickness of ∼400 nm was observed. Pt and Ir were evenly distributed within the film. Impedance was decreased by 89% @ 1 kHz. Accelerated soak testing in a heated (T = 50 ^∘C) saline solution showed impedance increase (@ 1 kHz) of ∼12% after 36 days (89 equivalent) of soaking.

客观的。基于碳纤维（CF）电极的神经接口已表现出关键的积极属性，例如最小的异物反应和自动插入脑组织的机械强度。然而，碳不与神经组织形成低阻抗电极界面。电沉积铂铱 (PtIr) 已用于改善金属生物电极的电极界面性能。方法。在这项研究中，在 CF 微电极阵列上进行了 PtIr 电沉积工艺，以改善这些阵列的界面特性。我们研究薄膜的形态和成分以及电极的耐久性和阻抗。结果。观察到 PtIr 涂层的成分为 70% Pt、30% Ir，厚度约为 400 nm。Pt 和 Ir 均匀分布在薄膜内。1 kHz 时阻抗降低了 89%。在加热 ( T = 50 ^∘ C) 盐水溶液中的加速浸泡测试显示，浸泡 36 天（89 天当量）后阻抗增加 (@ 1 kHz) ∼12%。