Single-analyte sensing experiments were performed by first exposing a MIM capacitor with ultra-thin gold electrodes and a ZIF-8 dielectric layer to an analyte atmosphere and subsequently heating the sensor rapidly from 24 to 40 °C (Fig. ). The markedly different capacitance transients illustrate the significant variation in diffusion kinetics of the adsorbates in ZIF-8, with water diffusing the fastest and hexane the slowest (Fig. ). For all VOCs, diffusion out of the ZIF-8 layer took longer than the time required to apply the thermal perturbation, indicated by the red-shaded time window in Fig. . Using Eq. 1 to fit each transient enabled the extraction of a diffusivity value and a pre-exponential factor corresponding to the desorbed quantity, further referred to as amplitude. These diffusivities closely matched those obtained by independent concentration-step measurements using a quartz crystal microbalance (SI Table ). For fast-diffusing compounds, in this case, water, the whole capacitance transient occurs during the temperature perturbation, and the time constant reflects the heating rate rather than diffusion in ZIF-8. The measured diffusivity values differed by orders of magnitude between VOCs and showed little concentration dependence in the ppm regime relevant for sensing (Fig. ). Therefore, acetone, 1-propanol, 1-butanol, and n-hexane could be readily differentiated using a single kinetic selectivity sensor. Current sensors, which typically output only the capacitance change at equilibrium, cannot provide selective analyte detection since all tested VOCs and water can give rise to an equally large equilibrium signal (Fig. ).