Hierarchical Co3O4/CuO nanorod array supported on carbon cloth for highly sensitive non-enzymatic glucose biosensing

SENSORS AND ACTUATORS B-CHEMICAL

卷:298

Article

Cheng, Siyi^1,2  DelaCruz, Steven^1,2  Chen, Chen³  Tang, Zirong³  Shi, Tielin³  Carraro, Carlo^1,2  Maboudian, Roya^1,2 

[1] Univ Calif Berkeley, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA

[3] Huazhong Univ Sci & Technol, State Key Lab Digital Mfg Equipment & Technol, Wuhan 430074, Hubei, Peoples R China

关键词: Hierarchical;    Co3O4@CuO;    Core-shell structure;    Carbon cloth;    Non-enzymatic biosensor;    Glucose sensor;   

DOI  :  10.1016/j.snb.2019.126860

来源: Elsevier

【 摘 要 】

A hierarchical core-shell Co3O4/CuO nanorod array (NRA) anchored on flexible carbon cloth (CC) has been fabricated through a stepwise process consisting of magnetron sputtering of Cu, its anodic oxidation, and chemical bath deposition of Co3O4. The structure, composition and morphology of the synthesized Co3O4/CuO NRA on CC were characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The glucose sensing performance of the Co3O4/CuO NRA on CC electrode was investigated by cyclic voltammetry and chronoamperometry. The sensor exhibited a high sensitivity of 5405 mu A mM(-1) cm(-2) with a fast response time (t(90) = 1.9 s) and a low detection limit of 0.38 mu M. The electrode also showed outstanding selectivity toward various interferences. These results indicate that the Co3O4/CuO nanocomposites may be promising electrode materials for electrochemical biosensing.

【 授权许可】

Free