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Zinc ion mediated synthesis of cuprous oxide crystals for non-enzymatic glucose detection

Abstract

Morphology control is expected to be an effective way to enhance the electrochemical properties of materials. In this work, zinc cation-mediated growth of Cu2O crystals was achieved by an aqueous chemical route in room temperature. Thus, by simply increasing the concentration of Zn2+, concave cube-like (C-Cu2O), porous (P-Cu2O), and hierarchical (H-Cu2O) Cu2O crystals were selectively obtained. The morphologies and structures of the as-prepared Cu2O crystals were characterized by SEM, TEM, XRD and XPS. The three materials were subsequently employed as active materials for the non-enzymatic detection of glucose. The H-Cu2O-based electrode exhibited the highest sensitivity (3076 μA•mM-1•cm-2) in virtue of its highest surface area, while the P-Cu2O-based electrode showed the widest linear range (up to 24 mM). The reliability of the Cu2O-based glucose sensors was proved by determining their detection limit, response time, selectivity, and stability characteristics on human serum samples. This work provides a novel strategy for the morphology-controlled Zn2+-mediated fabrication of Cu2O crystals having different glucose sensing performances depending on their structures.

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Publication details

The article was received on 23 Jul 2017, accepted on 29 Sep 2017 and first published on 02 Oct 2017


Article type: Paper
DOI: 10.1039/C7TB01971H
Citation: J. Mater. Chem. B, 2017, Accepted Manuscript
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    Zinc ion mediated synthesis of cuprous oxide crystals for non-enzymatic glucose detection

    J. Lv, C. Kong, X. Hu, X. Zhang, K. Liu, S. Yang, J. Bi, X. Liu, G. Meng, J. Li, Z. Yang and S. Yang, J. Mater. Chem. B, 2017, Accepted Manuscript , DOI: 10.1039/C7TB01971H

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