激光诱导石墨烯/碳纳米管复合柔性微电极的制备及性能研究

Preparation and Performance Study of Laser-induced Graphene/Carbon Nanotube Composite Flexible Microelectrodes

本文利用激光直写技术在聚酰亚胺(PI)薄膜上激光诱导产生石墨烯(LIG),将图案化的LIG转印在柔性聚二甲基硅氧烷(PDMS)基底上,多壁碳纳米管(MWCNTs)水分散液修饰LIG表面,从而制得良好导电性的LIG/MWCNTs复合柔性微电极。所制备的柔性微电极表面被MWCNTs均匀涂覆,保留了石墨烯蜂窝状3D介孔结构,形成的复合材料界面增加了电极的导电性。研究表明质量分数为5.2%的MWCNTs水分散液修饰的柔性电极表现出良好的电化学活性,所制备的电极具备良好的柔性、精密度和稳定性,且可重复使用,在可穿戴柔性电子传感等领域显示了广阔的应用前景。

In this paper,graphene(LIG)was laser-induced on polyimide(PI)thin films by laser direct writing technology,the patterned LIG was transferred to a flexible polydimethylsiloxane(PDMS)substrate,and the surface of the LIG was modified with multi-walled carbon nanotubes(MWCNTs)aqueous dispersion,so as to prepare LIG/MWCNTs composite flexible microelectrodes with good conductivity.The surface of the pre-pared flexible microelectrode is uniformly coated with MWCNTs,which retains the graphene honeycomb 3D mesoporous structure,and the composite interface formed increases the conductivity of the electrode.The results show that the flexible electrodes modified with 5.2%MWCNTs aqueous dis-persion exhibit good electrochemical activity,and the prepared electrodes have good flexibility,precision,stability,and can be reused,showing broad application prospects in the field of wearable flexible electronic sensing.