Fig. 6.

Normalized current signal vs. time, for a sensing mechanism in which a control perturbation produces the time-dependent current $I_c\left(t\right)$ and the event subject to detection alters this current. Eq. 11 models the current. The model parameters are as follows: $t_0=0.15$ ns, $T=298\hspace{0.17em}\hspace{0.17em}\text{K}$, $e\eta =0.2\hspace{0.17em}\hspace{0.17em}\text{eV}$, $\lambda =0.3\hspace{0.17em}\hspace{0.17em}\text{eV}$, ${\mathrm{\Gamma }}_d/2={10}^{-6}\hspace{0.17em}\text{eV}$, $V_{ad}=2\cdot {10}^{-3}\hspace{0.17em}\text{eV}$ (black lines) or $V_{ad}=0.02\hspace{0.17em}\hspace{0.17em}\text{eV}$ (cyan lines), and $\mathrm{\Delta }{E}_{ad}=k_{B}T/2$ (that is, a donor–acceptor energy gap within thermal fluctuations) before sensing, whereas this gap increases by 0.06 eV due to the sensed event.