Laser-induced fluorescence (LIF) spectra recorded from NapI-doped PMMA (a) and (b) following irradiation with a single “pump” pulse at . For comparison purposes, spectra recorded from PMMA doped with the indicated compounds are also illustrated.
dependence of the PhenH product formed upon a single pulse (each time on virgin area) at on PhenI— doped samples for the indicated PMMA ’s. The error bar represents as specified from at least five measurements for each system. The arrows indicate the ablation thresholds of the examined systems (Table I).
(a) Kinetics of PhenH formation for PhenI-doped PMMA samples of the indicated molecular weights upon irradiation at the corresponding thresholds. The inset illustrates the kinetics of PhenH formation at , showing that at low fluences, there is hardly any difference. (b) Kinetics of PhenH formation as predicted by the simulation (film thickness 20 μm).
dependence of formed upon a single pulse at on NapI-doped samples for different PMMAs. The error bar represents as specified from five measurements for each system.
(a) Kinetics of formation in the irradiation of the PMMA samples doped with NapI. (b) Simulated kinetics of formation. The dotted lines represent the kinetics that would be expected on the basis of the literature viscosity values.
PMMAs viscosity as a function of time (following UV irradiation at the corresponding ablation thresholds), as estimated via modelling formation kinetics in Fig. 5(a).
Glass transition temperature of PMMA of different molecular weights calculated according to the Flory-Fox equation (Ref. 39).
Data concerning the examined ArI/PMMA systems.
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