title: Printing graphene-carbon nanotube-ionic liquid gel on graphene paper: Towards flexible electrodes with efficient loading of PtAu alloy nanoparticles for electrochemical sensing of blood glucose.
abstract: 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.
authors.affiliation: Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China.
authors.forename: Wenshan
authors.initials: W
authors.lastname: He
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive 637457, Singapore.
authors.forename: Yimin
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Department of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, PR China.
authors.forename: Jiangbo
authors.initials: J
authors.lastname: Xi
authors.affiliation: Department of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, PR China.
authors.forename: Abduraouf Alamer Mohamed
authors.initials: AA
authors.lastname: Abdurhman
authors.affiliation: Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China. Electronic address: jhrenmed@hust.edu.cn.
authors.forename: Jinghua
authors.initials: J
authors.lastname: Ren
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive 637457, Singapore. Electronic address: hduan@ntu.edu.sg.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Duan
mesh_terms: D001786:Blood Glucose / Q000032:analysis*; D055664:Electrochemical Techniques; D004566:Electrodes; D006046:Gold / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D006801:Humans; D052578:Ionic Liquids / Q000737:chemistry*; D053768:Metal Nanoparticles; D008855:Microscopy, Electron, Scanning; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010209:Paper; D010984:Platinum / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D001786:Blood Glucose; D052578:Ionic Liquids; D037742:Nanotubes, Carbon; D010984:Platinum; D006046:Gold; D006108:Graphite
keywords: Alloy nanoparticle; Carbon nanotube; Flexible electrode; Graphene; Ionic liquid; Nonenzymatic glucose sensor