Abstract
A corn-like CeO2/C coaxial cable textured by a cerium oxide shell and a carbon core was designed to sense NO. The carbon core possesses high electrical conductivity, and the CeO2 surface delivers excellent electrocatalytic activity. The sensor, typically operated at 0.8 V (vs. Ag/AgCl), exhibits a detection limit of 1.7 nM, which is 4-times lower than that of CeO2 nanotubes based one (at S/N = 3). It also displays wide linear response (up to 83 μM), a sensitivity of 0.81 μA μM−1 cm−2, and fast response (2 s). These values are highly competitive to that of a CeO2 tube (0.92 μA μM−1 cm−2 and 2 s). The sensor was used to quantify NO that is released by Aspergillus flavus.
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Acknowledgements
This work is financially supported by National Key R&D Program of China (2017YFC1600900), the National Natural Science Foundation of China (21972111, 21773188), Natural Science Foundation of Chongqing (cstc2018jcyjAX0714), Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing Key Laboratory for Advanced Materials and Technologies.
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Hou, G., Yun, Y., Wang, M. et al. A coaxial nanocable textured by a cerium oxide shell and carbon core for sensing nitric oxide. Microchim Acta 186, 789 (2019). https://doi.org/10.1007/s00604-019-3839-1
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DOI: https://doi.org/10.1007/s00604-019-3839-1