State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China.
Research Centre for Smart Wearable Technology, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 999077, P. R. China.
J Mater Chem B. 2022 Jun 22;10(24):4632-4639. doi: 10.1039/d2tb00906d.
Implantable neural electrodes have been widely used to investigate the function of the brain and treat neurological disorders. Due to their advantages of size and preparation, fibrous neural electrodes have been widely applied, but conventional metal wire electrodes have many shortcomings that are impossible to overcome. Here, we present a modified graphene-based fiber electrode, which retains the excellent electrical properties of the graphene fiber (GF) electrode and enhances the charge storage capacity (CSC) from the initial 7.97 mC cm to 504.04 mC cm. The modified electrodes were further investigated experiments, and the results show that the modified graphene fibers controlled insect flight with a minimum voltage close to that of silver wire electrodes, and no irreversible chemical reaction occurred during the electrical stimulation process, which could achieve the stimulation effect while ensuring the safety of the tissues around the electrodes.
植入式神经电极被广泛用于研究大脑功能和治疗神经疾病。由于其尺寸和制备方面的优势，纤维状神经电极得到了广泛应用，但传统的金属丝电极存在许多无法克服的缺点。在这里，我们提出了一种改良的基于石墨烯的纤维电极，它保留了石墨烯纤维 (GF) 电极的优异电性能，并将初始的 7.97 mC cm 提高到 504.04 mC cm，从而增强了电荷存储能力 (CSC)。对改良后的电极进行了进一步的实验研究，结果表明，改良后的石墨烯纤维以接近银线电极的最小电压控制昆虫飞行，且在电刺激过程中未发生不可逆的化学反应，在实现刺激效果的同时确保了电极周围组织的安全性。
