Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China.
School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive 637457, Singapore.
Anal Chim Acta. 2016 Jan 15;903:61-8. doi: 10.1016/j.aca.2015.11.019. Epub 2015 Nov 28.
The increasing demands for portable, wearable, and implantable sensing devices have stimulated growing interest in innovative electrode materials. In this work, we have demonstrated that printing a conductive ink formulated by blending three-dimensional (3D) porous graphene-carbon nanotube (CNT) assembly with ionic liquid (IL) on two-dimensional (2D) graphene paper (GP), leads to a freestanding GP supported graphene-CNT-IL nanocomposite (graphene-CNT-IL/GP). The incorporation of highly conductive CNTs into graphene assembly effectively increases its surface area and improves its electrical and mechanical properties. The graphene-CNT-IL/GP, as freestanding and flexible substrates, allows for efficient loading of PtAu alloy nanoparticles by means of ultrasonic-electrochemical deposition. Owing to the synergistic effect of PtAu alloy nanoparticles, 3D porous graphene-CNT scaffold, IL binder and 2D flexible GP substrate, the resultant lightweight nanohybrid paper electrode exhibits excellent sensing performances in nonenzymatic electrochemical detection of glucose in terms of sensitivity, selectivity, reproducibility and mechanical properties.
对便携式、可穿戴和植入式感测器件的需求不断增加，这激发了人们对创新电极材料的浓厚兴趣。在这项工作中，我们证明了通过将三维（3D）多孔石墨烯-碳纳米管（CNT）组装体与离子液体（IL）混合制成的导电油墨印刷在二维（2D）石墨烯纸上（GP），可以得到一种独立的 GP 支撑的石墨烯-CNT-IL 纳米复合材料（graphene-CNT-IL/GP）。将高导电性的 CNT 掺入石墨烯组装体中，可有效增加其表面积，并改善其电和机械性能。石墨烯-CNT-IL/GP 作为独立且灵活的基底，可以通过超声电化学沉积有效地负载 PtAu 合金纳米粒子。由于 PtAu 合金纳米粒子、3D 多孔石墨烯-CNT 支架、IL 粘结剂和 2D 柔性 GP 基底的协同效应，所得的轻质纳米杂化纸电极在非酶电化学检测葡萄糖方面表现出优异的传感性能，在灵敏度、选择性、重现性和机械性能方面均有出色表现。
