Kim Semin, Jang Lindy K, Park Hyun S, Lee Jae Young
Gwangju Institute of Science and Technology, School of Materials Science and Engineering, Gwangju, Gwangju 500-712, Republic of Korea.
Korea Institute of Science and Technology, Fuel Cell Research Center, Hwarangro 14-gil 5, Seoul 02792, Republic of Korea.
Sci Rep. 2016 Jul 27;6:30475. doi: 10.1038/srep30475.
Electrode surfaces have been widely modified with electrically conductive polymers, including polypyrrole (PPY), to improve the performance of electrodes. To utilize conductive polymers for electrode modification, strong adhesion between the polymer films and electrode substrates should be ensured with high electrical/electrochemical activities. In this study, PPY films were electrochemically polymerized on electrodes (e.g., indium tin oxide (ITO)) with dopamine as a bio-inspired adhesive molecule. Efficient and fast PPY electrodeposition with dopamine (PDA/PPY) was found; the resultant PDA/PPY films exhibited greatly increased adhesion strengths of up to 3.7 ± 0.8 MPa and the modified electrodes had electrochemical impedances two to three orders of magnitude lower than that of an unmodified electrode. This electrochemical deposition of adhesive and conductive PDA/PPY offers a facile and versatile electrode modification for various applications, such as biosensors and batteries.
电极表面已广泛用包括聚吡咯（PPY）在内的导电聚合物进行修饰，以改善电极性能。为了将导电聚合物用于电极修饰，应确保聚合物薄膜与电极基底之间具有强附着力以及高电/电化学活性。在本研究中，以多巴胺作为仿生粘附分子，在电极（如氧化铟锡（ITO））上电化学聚合PPY薄膜。发现了用多巴胺实现高效快速的PPY电沉积（PDA/PPY）；所得的PDA/PPY薄膜表现出高达3.7±0.8MPa的显著提高的粘附强度，且修饰电极的电化学阻抗比未修饰电极低两到三个数量级。这种具有粘附性和导电性的PDA/PPY的电化学沉积为生物传感器和电池等各种应用提供了一种简便且通用的电极修饰方法。
