Figure 3 | Scientific Reports

Figure 3

From: Soft X-ray Heterogeneous Radiolysis of Pyridine in the Presence of Hydrated Strontium-Hydroxyhectorite and its Monitoring by Near-Ambient Pressure Photoelectron Spectroscopy

Figure 3

(a) N 1s spectra (small crosses) of the grounded sample measured at hν = 750 eV; (b) N 1s spectra (small crosses) of the +30 V biased sample measured at hv = 750 eV; (c) N 1s spectra of the grounded sample measured at hν = 450 eV (surface sensitive conditions). Curve fits (red solid line) are also given. In all cases, the sample is kept at +2 °C. The water pressure is 0.5 mbar (RH = 7%). Pyridine gas is added (partial pressures are indicated, from 0.1 to 0.5 mbar) while the water pressure is kept constant. After pumping down the gas mixture, a pressure of 10−7 mbar is recovered. All spectra are aligned with respect to the Mg 2p maximum at 50.00 eV and the O 1s maximum at 532.32 eV (see text and Supporting Information, section S2). We recall to the reader that the gas-phase contribution can only be seen when the sample is grounded (see Methods).

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