Fig. 2. Desorption transition in PtBS thin films.

a Heating scans at 10⁴ K s⁻¹ after annealing at 458 K for 5 × 10⁴ s (red curves), before adsorption (reference, blue curves) and after desorption (rejuvenated, green curves). Black lines at about 440 K highlight the step in the specific heat associated with the glass transition. The inset of a is an enlargement in the temperature range where desorption takes place. b Enthalpy of desorption (left triangles) and temperature of the maximum of the endothermic overshoot (right triangles) as a function of the annealing temperature. The inset of panel b shows the enthalpy of desorption after annealing for 5 × 10⁴ s at 458 K as a function of the film thickness. Error bars account for the uncertainty in the determination of the temperature maximum (T_des) and intensity (ΔH_des) of the overshoot.