5 1 Conceptual approach 8 1.1 Scope of this thesis 8 1.2 Electronic and geometric effects in bimetallic catalysts 10 1.3 Mixed Oxides 11 1.4 (Strong) metal-support interaction 12 1.5 The role of the Pd-hydride phases 14 1.6 Oxide-supported Pd bimetallics in methanol steam reforming 14 1.7 Model Systems 21 2 Appendix: Experimental approach and methods 25 2.1 Electron Microscopy and related techn...

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The density of oxygen vacancies characterization in high-k/metal gate is significant for semiconductor device fabrication. In this work, a new approach was demonstrated to detect the density of oxygen vacancies by in situ x-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) measurement. Moreover, the band alignment of the structure with optical band gap measur...

Ionic liquid surfaces can become electrically charged during X-ray photoelectron spectroscopy experiments, due to the flux of photoelectrons leaving the surface. This causes a shift in the measured binding energies of X-ray photoelectron peaks that depends on the magnitude of the surface charging. Consequently, a charge correction method is required for ionic liquids. Here we demonstrate the na...

PbS nanocrystal nc-PbS -C60 photovoltaic devices are demonstrated, in which nc-PbS function as electron donors, showing infrared photosensitivity up to 1600 nm. Annealing nc-PbS is proved to remove capping oleic acid ligands, studied using x-ray photoelectron spectroscopy, significantly improving the short circuit current, open circuit voltage, and fill factor. The device performance is rationa...

Arnaud Le Febvrier, Jens Jensen and Per Eklund, Wet-cleaning of MgO(001): Modification of surface chemistry and effects on thin film growth investigated by x-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectroscopy, Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films, 2017. 35(2). http://dx.doi.org/10.1116/1.4975595 Copyright: AIP Publishing http://ww...

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The molecular density of an aminosilane self-assembled monolayer formed from N-(2-aminoethyl)-3-aminopropyltriethoxysilane (AEAPS) by a vapor phase method has been estimated to be about 3 AEAPS molecules per nm(2) based on chemical labeling, optical absorption spectroscopy and X-ray photoelectron spectroscopy.

The conjugated aromatic system of graphene was used to trap the reactive, boron-rich 1,2-carborane cluster. Functionalization of the graphene surface was confirmed by solid-state MAS (11)B NMR spectroscopy and quantified by X-ray photoelectron spectroscopy. This work represents the first confirmed example of direct functionalization of a graphene lattice with carboranes.