title: Synthesis of three dimensional nickel cobalt oxide nanoneedles on nickel foam, their characterization and glucose sensing application.
abstract: In the present work, NiCo2O4 nanostructures are fabricated in three dimensions (3D) on nickel foam by the hydrothermal method. The nanomaterial was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The nanostructures exhibit nanoneedle-like morphology grown in 3D with good crystalline quality. The nanomaterial is composed of nickel, cobalt and oxygen atoms. By using the favorable porosity of the nanomaterial and the substrate itself, a sensitive glucose sensor is proposed by immobilizing glucose oxidase. The presented glucose sensor has shown linear response over a wide range of glucose concentrations from 0.005 mM to 15 mM with a sensitivity of 91.34 mV/decade and a fast response time of less than 10 s. The NiCo2O4 nanostructures-based glucose sensor has shown excellent reproducibility, repeatability and stability. The sensor showed negligible response to the normal concentrations of common interferents with glucose sensing, including uric acid, dopamine and ascorbic acid. All these favorable advantages of the fabricated glucose sensor suggest that it may have high potential for the determination of glucose in biological samples, food and other related areas.
authors.affiliation: Department of Science and Technology, Campus Norrköping, 60174, Linköping University, SE-60174 Norrköping, Sweden. mushtaque.hussain@liu.se.
authors.forename: Mushtaque
authors.initials: M
authors.lastname: Hussain
authors.affiliation: Department of Science and Technology, Campus Norrköping, 60174, Linköping University, SE-60174 Norrköping, Sweden. zafar.hussain.ibupoto@liu.se.
authors.forename: Zafar Hussain
authors.initials: ZH
authors.lastname: Ibupoto
authors.affiliation: Department of Science and Technology, Campus Norrköping, 60174, Linköping University, SE-60174 Norrköping, Sweden. mazhar.ali.abbasi@liu.se.
authors.forename: Mazhar Ali
authors.initials: MA
authors.lastname: Abbasi
authors.affiliation: Department of Physics, Chemistry and Biology, Linköping University, Linköping 58183, Sweden. xianjie.liu@ifm.liu.se.
authors.forename: Xianjie
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Science and Technology, Campus Norrköping, 60174, Linköping University, SE-60174 Norrköping, Sweden. omer.nour@liu.se.
authors.forename: Omer
authors.initials: O
authors.lastname: Nur
authors.affiliation: Department of Science and Technology, Campus Norrköping, 60174, Linköping University, SE-60174 Norrköping, Sweden. magnus.willander@liu.se.
authors.forename: Magnus
authors.initials: M
authors.lastname: Willander
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D002138:Calibration; D003035:Cobalt / Q000737:chemistry; D005947:Glucose / Q000032:analysis*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D011199:Potentiometry; D015203:Reproducibility of Results; D013997:Time Factors; D014961:X-Ray Diffraction
chemical_list: D010087:Oxides; D003035:Cobalt; D009532:Nickel; D005947:Glucose