Figure 3
From: Accelerating Gas Adsorption on 3D Percolating Carbon Nanotubes
Extraction of adsorption rate.
(a) Overlap in the subthreshold regime of the transfer characteristics Id-Vg and the time-response characteristics Id,off-t of the 13-nm-thick composite-FET to 50 ppm NO2 exposure. The train of the Vg pulses for the Id,off-t curve is +8 V/−8 V. (b) Dependence of 
on NO2 concentration for a series of composite films of different thickness, d, along with an SWCNT-network film. Solid lines: fitting results according to equation (2). The data points and error bars represent the average value and the standard deviation, respectively, from six separate sensors of the same material. Inset: dependence of β on d, solid line is the linear curve fitting with a slope of 3.3×1011 cm−2 s−1 per nm.
