Porous CuO nanobelts assembly film for nonenzymatic electrochemical determination of glucose with High fabrication repeatability and sensing stability

材料科学 煅烧 电极 氧化铟锡 纳米技术 制作 电化学 纳米材料 线性范围 多孔性 电化学气体传感器 薄膜 检出限 化学工程 化学 复合材料 色谱法 医学 生物化学 替代医学 工程类 物理化学 病理 催化作用
作者
Yong-Yu Li,Ping Kang,Hong-Qi Huang,Zhonggang Liu,Gang Li,Zheng Guo,Xing‐Jiu Huang
出处
期刊:Sensors and Actuators B-chemical [Elsevier BV]
卷期号:307: 127639-127639 被引量:44
标识
DOI:10.1016/j.snb.2019.127639
摘要

Due to high sensitivity, nonenzymatic glucose sensors based on nanomaterials have attracted great attention in various fields. However, it is still a critical issue to develop a highly sensitive, selective and stable nonenzymatic glucose sensor. In this manuscript, a Langmuir–Blodgett (L-B) assembly technique along with in situ thermal oxidation has been proposed to repeatedly construct a stable nonenzymatic electrochemical glucose sensor based on porous CuO nanobelts (CuO PNBs) film as an example. Cu2Se nanobelts are first assembled to be a uniform and dense film via the l-B technique. After transferred onto indium tin oxide (ITO) electrode and followed with in situ calcination in air, they are transformed into CuO PNBs film, which is closely anchored on the ITO electrode. Through manipulating the number of assembly layer, the thickness of CuO PNBs film can be tunable. Electrochemical results demonstrate that the sensing performance of the CuO PNBs film toward glucose is highly associated with its thickness. Under the optimal thickness of about 230 nm, it exhibits the best sensitivity with a low detection limit of 60 nM in a wide linear range from 0.1 μM to 2 mM. More importantly, the CuO PNBs assembly film displays a robust stability and anti-interference capability. Finally, the enhanced sensing mechanism and effect of the film thickness are discussed for the CuO PNBs film toward glucose.
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