Figure 3: Real-time electrical read-out of NO signals.
From: Real-time electrical detection of nitric oxide in biological systems with sub-nanomolar sensitivity
(a) Real-time electrical measurement of different concentrations of NO. (b) Calibration curve: conductance change (ΔG) versus NO concentration (CNO). The red line is the fitted curve in natural logarithmic scale. (c) Relationship of the detection limit versus the transconductance of different sensor devices. (d) Solution gate-dependent measurement at different concentrations of NO. Vg, solution gate voltage. (e) Raman spectra of graphene–hemin in NO solutions at different concentrations. Black: PBS; red: 100 nM NO, with 0.1 offset; blue: 1 μM NO, with 0.2 offset; violet: 10 μM NO, with 0.3 offset; green: 100 μM NO, with 0.4 offset.
