期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 296, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.05.094
关键词
CuO nanowires; Large-scale fabrication; Thermal oxidation; PBA precursor; Ascorbic acid sensors
资金
- National Natural Science Foundation of China [21706116, 21727818]
- Innovative Research Team Program by the Ministry of Education of China [IRT_17R54]
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
One-dimensional metal oxides have been attracting interest as advanced materials for trace target recognition in chemical sensors due to their ultra-high surface area and electrochemical activity. However, the development of a large-scale and controllable fabrication strategy remains a great challenge and has hindered their practical application. In this work, we design a novel thermal oxidation route for obtaining a large area of CuO nanowires by the use of a film precursor of the nanocubic Cu-Fe Prussian blue analogue (PBA). The nanostructure and distribution of the PBA film was precisely controlled using an electrostatic self-assembly approach. The CuO nanowire shape was formed in-situ via the growth confinement effect through the air-heating collapse and oxidation of PBA crystals. At a very low working potential of 0.1 V, the as-prepared CuO nanowire sensor exhibited excellent sensing performance on ascorbic acid over a wide linear range (20-400 mu M) and a low detection limit (0.5 mu M), as well as high selectivity despite various interferences.
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