Fig. 3: Preparation of renewable electrochemical sensor. | Microsystems & Nanoengineering

Fig. 3: Preparation of renewable electrochemical sensor.

From: Micro pharmacokinetics-pharmacodynamics monitoring of anti-Parkinson’s disease drugs using a microphysiological BBB-brain organ-on-a-chip

Fig. 3

a Schematic illustration of the preparation of electrochemical sensor. b TEM and high-resolution TEM (inset) images of N-CQDs. c Particle size distribution of N-CQDs. d XRD pattern of N-CQDs. e SEM images of different modified sensors. f DPV curves for different concentrations of PPX in CCM using microfluidic sensing chip coupled U-disk electrochemical workstation. g Linear relationship for different concentrations of PPX in CCM. Curves a–k: 5, 10, 25, 50, 100, 200, 300, 400, 500, 750 and 1000 μM PPX. Inset: Enlarged image of curves a–c. h Inter-group reproducibility and histogram of current values (inset). i Intra-group reproducibility and histogram of current values (inset). j Schematic illustration of electrochemical cleaning. k Intra-group reproducibility after electrochemical cleaning and histogram of current values (inset)

Back to article page