1,721,190 research outputs found
Structure and chemical reactivity of transition metal surfaces as probed by synchrotron radiation core-level photoelectron spectroscopy
No full textDesign study of a double pass hemispherical electron energy analyser with multichannel detector
No full textIdentification of adsorption site by means of high-resolution surface core level shift: oxygen on Ru(10-10)
No full textHigh resolution fast x-ray photoelectron spectroscopy study of ethylene interaction with Ir(111): from chemisorption to dissociation and graphene formation.
No full textHigh-energy resolution fast X-ray photoelectron spectroscopy was used to study the thermal evolution
of ethylene on Ir(111). Temperature programmed photoemission spectra of the C 1s and Ir 4f7/2 core
levels were measured in 400 ms/spectrum while ramping the temperature from 170 to 1120 K. The C 1s
spectra display a large variety of components, assigned to different carbon containing species present
on the surface at increasing temperature, namely ethylene, ethylidene, ethylidyne, ethynyl, adsorbed
carbon and finally graphene. Components due to the C–H stretch vibration excitation are clearly resolved
for C2H4, CHCH3 and C2H3. The C 1s spectra of the last two species display also shifted components that
belong to non-equivalent carbon atoms. At temperatures higher than 900K the narrowing of C 1s spectra
is caused by graphene formation. Also the Ir 4f7/2 spectra are strongly affected by the presence of the
different species. The clean surface component moves initially towards the bulk peak and shifts back and
forth along the series, to recover the binding energy position corresponding to the clean surface when
the graphene layer is completely formed. A comparison of ethylene interaction with Ir(111) and Pt(111)
is presented
A fringing field corrector for the boundary between two electrostatic deflection analyzers placed in tandem
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Anharmonic contribution to the temperature dependence of photoemission core level spectroscopy of adsorbates on surfaces: oxygen on Rh(110).
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Molecular and mixed coadsorbed layers produced by NO adsorption on (1x1) and (1x2) Rh(110)
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