Thayer School of Engineering, Dartmouth College, Hanover, NH, 03755, USA.
Thayer School of Engineering, Dartmouth College, Hanover, NH, 03755, USA.
Biosens Bioelectron. 2024 Oct 1;261:116418. doi: 10.1016/j.bios.2024.116418. Epub 2024 May 21.
Electroplating of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) is important in many neuroelectronic applications but is challenging to achieve uniformity on large-scale microelectrode arrays (MEA) using conventional galvanostatic methods. In this study, we address this challenge through a potentiostatic method and demonstrate highly uniform electroplating of PEDOT:PSS on MEA with more than one hundred electrodes, all at cellular sizes. The validation of this approach involves comparisons with galvanostatic deposition methods, showcasing unparalleled deposition yield and uniformity. Systematic electrochemical characterizations reveal similarities in structure and stability from potentiostatic deposited coatings. The advances developed here establish the potentiostatic method and detailed process to achieve a uniform coating of PEDOT:PSS on large-scale MEA, with broad utility in neuroelectronics.
聚（3,4-亚乙基二氧噻吩）聚苯乙烯磺酸盐（PEDOT:PSS）的电镀在许多神经电子应用中非常重要，但使用传统的恒电流方法在大规模微电极阵列（MEA）上实现均匀性具有挑战性。在这项研究中，我们通过恒电位方法解决了这一挑战，并证明了在具有一百多个电极的MEA 上进行高度均匀的 PEDOT:PSS 电镀，所有电极的尺寸均为细胞大小。该方法的验证涉及与恒电流沉积方法的比较，展示了无与伦比的沉积产率和均匀性。系统的电化学特性研究揭示了恒电位沉积涂层在结构和稳定性方面的相似性。这里开发的进展确立了恒电位方法和详细的工艺，以在大规模 MEA 上实现 PEDOT:PSS 的均匀涂层，在神经电子学中有广泛的应用。
