期刊
APPLIED SURFACE SCIENCE
卷 481, 期 -, 页码 712-722出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2019.03.157
关键词
CuO; Solution combustion synthesis; Colloidal synthesis; Glucose sensor materials; Non-enzymatic sensors
类别
资金
- Qatar national research fund (a member of Qatar foundation) [NPRP8-145-2-066]
In this work, copper nanoparticles using three different modes are synthesized and evaluated for electrochemical properties towards non-enzymatic glucose biosensors. Copper oxide nanoparticles thus obtained are characterized using X-ray diffractometer (XRD), Scanning Electron Microscope (SEM), transmission electron microscopy (TEM) and UV-Vis for their crystallinity, morphology and optical properties. The nanoparticles obtained using colloidal method (Cu-Colloid) give uniform phase of CuO and flower shaped morphology. The nanoparticles synthesized using solution combustion method with glycine (Cu-Gly) and hydrazine (Cu-Hyd) as fuel provide particles of irregular round shape and small flake-like structures respectively. The glucose electro oxidative current is highest for Cu-Colloid catalysts and could be due to the higher area of contact of the catalyst surface with the glucose. Cu-colloid particles with flower shaped morphology give wide linear response in the range of 1 mu M to 850 mu M along with the lowest limit of detection of 0.25 mu M and highest sensitivity of 2062 mu A mM(-1) cm(-2). Cu-Colloid catalyst show poor response on the presence of co-existing species on the blood sample when compared to its sensitivity towards glucose. The time response of Cu-Colloid particles for glucose detection is the least when compared to other two nanoparticles. Also, the Cu-Colloid particles show excellent reproducibility and stability that makes it a promising electrode for the non-enzymatic glucose bio-sensors.
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