title: Free-standing nickel oxide nanoflake arrays: synthesis and application for highly sensitive non-enzymatic glucose sensors.
abstract: We report a seed-mediated hydrothermal growth of free-standing nickel hydroxide [Ni(OH)(2)] and nickel oxide (NiO) nanoflake arrays and their implementation as electrodes for non-enzymatic glucose sensors. Ni(OH)(2) nanoflakes were converted into porous NiO nanoflakes upon thermal annealing in air at temperatures of 300 °C or above. NiO nanoflake-arrayed sensors achieve an excellent glucose sensitivity of ∼8500 μA cm(-2) mM(-1) and a low detection limit of 1.2 μM glucose at an applied bias of 0.5 V vs. Ag/AgCl. The fabrication of the nanoflake electrode avoids the use of polymer binders representing additional advantage over the conventional powder based glucose sensors. Furthermore, they show good specificity to glucose in the presence of ascorbic acid, d-lactose and d-fructose.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, USA.
authors.forename: Gongming
authors.initials: G
authors.lastname: Wang
authors.forename: Xihong
authors.initials: X
authors.lastname: Lu
authors.forename: Teng
authors.initials: T
authors.lastname: Zhai
authors.forename: Yichuan
authors.initials: Y
authors.lastname: Ling
authors.forename: Hanyu
authors.initials: H
authors.lastname: Wang
authors.forename: Yexiang
authors.initials: Y
authors.lastname: Tong
authors.forename: Yat
authors.initials: Y
authors.lastname: Li
mesh_terms: D001205:Ascorbic Acid / Q000737:chemistry; D055664:Electrochemical Techniques; D004566:Electrodes; D005632:Fructose / Q000737:chemistry; D005947:Glucose / Q000032:analysis*; D007785:Lactose / Q000737:chemistry; D009532:Nickel / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry
chemical_list: D011108:Polymers; D005632:Fructose; D009532:Nickel; C028007:nickel monoxide; D005947:Glucose; D007785:Lactose; D001205:Ascorbic Acid