Journal
MICROCHEMICAL JOURNAL
Volume 193, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.microc.2023.108922
Keywords
Cuprous oxide; Morphology engineering; Glucose sensing; OH- concentration
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The controllable morphology engineering of Cu2O nanospheres, nanocubes, and microcubes was achieved through adjusting the OH- concentration. Cu2O nanospheres exhibited the highest sensitivity and the lowest detection limit among the different morphologies. The sensor showed excellent anti-interference ability, reproducibility, and long-term stability, making it practical for non-enzymatic glucose sensing.
The controllable morphology engineering of active electrode materials is an effective strategy to obtain high performance non-enzymatic glucose sensing. Herein, different morphologic cuprous oxide (Cu2O nanospheres, nanocubes and microcubes) were controllably prepared by wet-chemistry precipitation technique through adjusting the OH- concentration. The growth and evolution mechanism of Cu2O at different OH- concentrations were extensively studied. Electrochemical testing revealed that Cu2O nanospheres had the highest sensitivity of 1438 & mu;A mM-1 cm-2 and the lowest detection limit of 0.17 & mu;M (S/N = 3), making them the best choice for glucose sensing. Additionally, the glucose detection range spanned two orders of concentration magnitude (0.5 & mu;M - 1.332 mM and 1.332 mM - 3.832 mM), and the sensor displayed excellent anti-interference ability, reproducibility, and long-term stability. The electrode material also performed well in detecting glucose in real serum samples, indicating its practical applicability as a non-enzymatic sensor.
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