Fig. 3 | Nature Communications

Fig. 3

From: High-power hybrid biofuel cells using layer-by-layer assembled glucose oxidase-coated metallic cotton fibers

Fig. 3

Electrochemical properties of biofuel cell anode. a Illustration of the anode fibers composed of m-bilayered glucose oxidase (m-GOx)/20-bilayered metallic cotton fibers (20-MCF). b Ultraviolet-visible (UV−Vis) spectra of the GOx/tris-(2-aminoethyl)amine (TREN)m multilayers. Inset: hyperchromicity of the multilayers at 277 nm. c Anodic current density curves of the (GOx/TREN)m/20-MCF electrode. Inset: the change in the normalized anodic current density levels at +0.6 V; here, the normalized level is defined as the current density level for which the anodic current density level of 20-MCF (m = 0, black curve) is subtracted from the anodic current density level of m-GOx/20-MCF at the specific potential of +0.6 V. The error bars show the standard deviation from the mean value of current densities for 3−5 independent experiments. d Nyquist curves for (GOx/TREN)m/20-MCF

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