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. Author manuscript; available in PMC: 2016 Jun 21.
Published in final edited form as: Analyst. 2012 Apr 27;137(11):2674–2681. doi: 10.1039/c2an35157a

Fig. 4.

Fig. 4

Electrode noise is thermal in origin under careful recording conditions. Plots of the current PSD versus the real part of the admittance measured using a sinusoidal voltage at the indicated frequencies with a dc potential of 600 mV. The solid line is 4kT, the expected relationship if the noise is thermal in origin. The planar electrodes had various areas whereas the CF electrodes had a diameter of ~8 μm a mean area of ~97 μm2 (estimated from capacitance measurements). A. Au electrode B. DLC:N electrode C. ITO electrode and D. CF electrode.