Open AccessOne-Dimensional Copper Oxide Nanoparticles Embedded Conductive Nanotube Arrays for High Performance Glucose Sensors
Author(s) -
Kaili Qi,
Shan Liu,
Yuanyuan Li,
Rongsheng Chen,
Feng Liang
Publication year - 2021
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/ac34cd
Subject(s) - materials science , nanoparticle , carbon nanotube , detection limit , copper oxide , substrate (aquarium) , nanotechnology , oxide , copper , nanotube , selectivity , electrical conductor , chemical engineering , chemistry , composite material , catalysis , chromatography , metallurgy , organic chemistry , engineering , oceanography , geology
Non-enzymatic glucose sensors have been extensively exploited recently. But the nanostructured non-enzymatic sensors often suffer from the aggregation of the nanoscale particles and poor conductivity of the composed metal oxides. In this work, a highly conductive one-dimensional carbon nanofilm coated TiO 2 nanotube arrays (TiO 2 @C NTAs) were fabricated as the substrate. Copper oxide nanoparticles (CuO x NPs) were then deposited on the substrate to prepare CuO x NPs/TiO 2 @C NTAs as the glucose sensor. Under optimal conditions, the CuO x NPs/TiO 2 @C NTAs sensor shows a linear dependence on glucose concentration from 0.001 to 2.467 mM, with a sensitivity of 1155.68 μ A mM −1 cm −2 . The detection limit is 0.17 μ M (S/N = 3). The prepared sensor exhibits high reproducibility and selectivity towards glucose determination, with minimal response to the coexistent species such as mannose, fructose, and 4-acetaminophenol, etc. Monitoring glucose from human serum sample has also been conducted, suggesting good reliability of this sensor.