Nonlinear electrical properties of carbon nanotube forests
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(Color online) (a) Room temperature four-probe I-V dependences and numerically evaluated differential conductance normalized by average conductance value G 0 for several MWNT forests, (b) room temperature two-probe dI/dV and d 2 I/dV 2 obtained by numerical differentiation of I-V dependences (black) and experimentally recorded using lock-in technique (red) for the same MWNT forest, (c) temperature dependence of electrical conductance of MWNT forest G(T) (black) and its numerical derivative dG(T)/dT (blue), (b) differential conductance profiles recorded at various temperatures, (c) temperature dependence of magnitude of ZBA normalized by average conductance value ΔG/G 0, (d) second derivative of differential conductance recorded at various temperatures.
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