One-Step to Prepare Self-Organized Nanoporous NiO/TiO 2 layers and its use in non-enzymatic glucose sensing

Abstract

A highly ordered nanoporous NiTi oxide layers were fabricated on Ti alloys with high Ni contents (50.6â at.%) by a combination of self-organizing anodization at 0 C and subsequent selective etching in H 2 O 2. The key for successful formation of such layers is to sufficiently suppress the dissolve of NiO by applying lower temperature during anodization. The resulting nanoporous structure is connected and well-adhered, which exhibits a much higher electrochemical cycling stability in 0.1â M NaOH. Without further surface modification or the use of polymer binders, the layers can be behave as a low-cost, stable and sensitive platform in non-enzymatic glucose sensing.