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. 2018 Mar 2;10(3):41. doi: 10.1007/s40820-018-0193-5

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 6 — Chronoamperometric curve recorded from Ab@e-RGO SPE vs. different concentrations of a antigen cortisol, b antigen lactate. c Calibration curve from anti-cortisol Ab@e-RGO SPE against various concentrations of antigen cortisol. d Calibration curve from anti-lactate Ab@e-RGO SPE against various concentrations of antigen lactate. e, f Investigations of sensor response toward cortisol and lactate, respectively, in addition to other non-specific proteins, to assess the device’s specificity (concentration was fixed at 1 mM)