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Updated: Jan 3, 2026

Synthesis and Functionalization of Nitrogen-doped Carbon Nanotube Cups with Gold Nanoparticles as Cork Stoppers
Published on: May 13, 2013
A coaxial nanocable textured by a cerium oxide shell and carbon core for sensing nitric oxide
Guorong Hou1, Yanjing Yun1, Minqiang Wang1
1Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing, 400715, People's Republic of China.
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. Graphical abstractSchematic representation of corn-like CeO2/C which can more sensitively and effectively detect NO released from A. flavus than when using CeO2 nanotubes, benefitting from its unique coaxial cable structure.
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