Figure 5 (A) Schematic illustration of GRP sensor[80]. (B) Schematic illustration of orientation and cyclic voltammograms of untreated and ethanol-treated laccase on SWCNT/GCE[79]. Reproduced with permission of Ref. 79, copyright 2017 American Chemical Society. (C) (a) Schematic illustration of GRP sensor for in vivo sensing of AA. (b) Calibration curves of the GRP sensor before and after BSA absorption. (c) Real-time recording of cortical AA level during global cerebral ischemia (red arrow) and reperfusion (blue arrow)[80]. Reproduced with permission of Ref. 80, copyright 2018 American Chemical Society. (D) (a) Schematic illustration of the single-carbon-fiber-powered microsensor and in vivo sensing of AA with the microsensor. (b) Change in open circuit voltage (OCV) after adding AA and interferents. (c) In vivo synchronous OCV measurement with the microsensor and electrophysiological recording by the MEA[81]. Reproduced with permission of Ref. 81, copyright 2020 WILEY-VCH. (color on line)
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