Ag-Doped CuO Microflowers on Multilayer Graphene for a Highly Sensitive Non-Enzymatic Glucose Sensor

• Published in: Journal of electronic materials 2022-03, Vol.51 (3), p.995-1003
• Main Authors: Xu, Junming, Tang, Mengxia, Liu, Shuling, Zhou, Jijun, Sheng, Weiqin, Zhou, Tao, Wu, Jun, Song, Kaixin, Wang, Xinchang, Cheng, J. P.
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Deposition; Electronics and Microelectronics; Emission analysis; Field emission microscopy; Glucose; Graphene; Instrumentation; Materials Science; Multilayers; Optical and Electronic Materials; Original Research Article; Selectivity; Sensors; Silver; Solid State Physics
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-021-09387-5

In situ synthesis of Ag-doped CuO microflowers on multilayer graphene (MLG) and their application in non-enzymatic detection of glucose are studied here. Mechanically exfoliated MLG has particular advantages such as low defects and cost efficiency. However, the deposition of CuO on its surface is still a challenge due to the lack of active sites on the MLG surface. In this work, a one-step chemical bath deposition approach is developed to synthesize homogeneous CuO microflowers and Ag-doped CuO microflowers on MLG surfaces. The CuO structures are composed of ultra-small CuO nano-spindles and internal nano-gaps. The materials are well characterized by x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and energy-dispersive spectrometry (EDS) and evaluated as glucose sensors. The electrode of Ag-doped CuO microflowers on MLG exhibits a sensitivity of 1527 μA mM −1 cm −2 in a linear response range of 0.01 mM ~ 6.0 mM with an excellent selectivity and a long-term stability. The composite is a promising material for glucose sensors due to its facile synthesis and highly detective performance.