Ordered-standing nickel hydroxide microchannel arrays: Synthesis and application for highly sensitive non-enzymatic glucose sensors

Abstract

A non-enzymatic glucose sensor is constructed by using nickel hydroxide (Ni(OH)2) modified silicon microchannel plates (MCP) as the sensing materials. The 3D ordered Si MCP is fabricated by electrochemical etching and the Ni(OH)2 coating are prepared by electroless plating. The nanocomposite electrode exhibits good catalytic activity toward oxidation of glucose in 0.1M KOH. This non-enzymatic glucose sensor boasts a fast amperometric response time of less than 5s, sensitivity of 0.25mAmM−1cm−2, and detection limit of 3.5μM at a signal-to-noise ratio of 3. The sensor shows superior stability, anti-interference capability, and selectivity. The good analytical capability, low cost, and compatibility with silicon technology make the Ni(OH)2/Si MCP electrode promising in amperometric non-enzymatic glucose detection.