Fig. 7
From: Graphene quantum dot nanocomposites: electroanalytical and optical sensor technology perspective
(Reproduced with permission from Ref. Ganganboina et al. 2021, Copyright 2021, Elsevier)
a Illustration of the synthesis and fabrication of GCE||Au–CNS@S-GQD/Ang-2 biosensor, b pulse-induced electrochemical detection of glioma cells, c calibration line obtained from change in Rct versus glioma cells concentration, d Nyquist plot of GCE||CNS–Au@S-GQDs/Ang-2 sensor at different concentrations of glioma cells in human serum, and e calibration line obtained from the change in Rct versus glioma cells concentration