access icon free Non-enzymatic glucose sensor based on three-dimensional hierarchical Co3O4 nanobooks

A new non-enzymatic glucose sensor is demonstrated successfully, based on three-dimensional (3D) hierarchical Co3O4 nanobooks (Co3O4 NBs). The 3D hierarchical Co3O4 NBs are assembled with porous and high crystalline 2D Co3O4 nanosheets. The electrochemical measurements reveal that the device exhibits outstanding performance for glucose detection, achieving a maximal sensitivity of 1068.85 μA mM−1cm−2 with a high R 2 of 0.9836, a low detection limit of 7.94 μM with a signal-to-noise of 3 and wide linear range up to 6 mM. The results demonstrate that the non-enzymatic glucose sensor can respond swiftly and selectively to glucose due to the high electrocatalytic activity of the 3D hierarchical Co3O4 NBs. The sensor also shows its high sensitivity and selectivity in detecting glucose in blood serum, confirming the practical application of the device with appealing accuracy.

Inspec keywords: electrochemical sensors; catalysts; chemical variables measurement; catalysis; nanosensors; electrochemistry; cobalt compounds; sugar

Other keywords: 3D hierarchical NB; high crystalline 2D nanosheets; electrochemical measurements; glucose detection; blood serum; assembling; porous crystalline 2D Co; Co3O4; three-dimensional hierarchical nanobooks; nonenzymatic glucose sensor; electrocatalytic activity

Subjects: Electrochemistry and electrophoresis; MEMS and NEMS device technology; Sensing and detecting devices; Microsensors and nanosensors; Chemical variables measurement; Chemical sensors; Chemical sensors; Micromechanical and nanomechanical devices and systems; Heterogeneous catalysis at surfaces and other surface reactions

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2019.0552
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