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Temperature Dependence in the NEXAFS Spectra of n-Alkanes.
Journal of Physical Chemistry A, 2018The near edge X-ray absorption fine structure (NEXAFS) spectra of orthorhombic single crystals of n-octacosane ( n-C28H58), recorded at room temperature (298 K) and at cryogenic temperatures (93 K), show distinct differences. The characteristic carbon 1s
Sahan D Perera +3 more
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PEEM and μ-NEXAFS of CuInS2-surfaces
Thin Solid Films, 2003Abstract Polycrystalline CuInS 2 samples are an ideal system for photoemission electron microscope studies. The polycrystalline grains have a diameter of approximately 5 μm and the system is expected to be highly inhomogeneous because of the existence of many sub-phases.
K. Müller, Y. Burkov, D. Schmeißer
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Calculations of NEXAFS Spectra of Substituted Benzenes
Le Journal de Physique IV, 1997We examine the role of substituent strengths and positions for NEXAFS spectra of substituted benzenes by means of static exchange calculations on aniline, phenol, fluorobenzene, and terephthalaldehyde. Chemical shifts and intensities of the ls → π* excitations are found to be closely related to the electronegative character of the substituent group ...
L. Yang +3 more
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Selected Applications of NEXAFS
1992Here we discuss selected examples of how NEXAFS has been used to obtain information on the electronic and crystallographic structure of molecular adsorption systems. Our examples cover a wide range of molecular adsorption energies, from weak van-der-Waals like interactions to strong chemical bonds, and address a diversity of molecules, ranging from ...
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NEXAFS investigations of cyclooctatetraene on TiO2(001)
Surface Science, 2001Abstract Near-edge X-ray absorption fine structure (NEXAFS) was used to examine the nature of the adsorbed intermediate in the ring contraction of cyclooctatetraene (COT) to form benzene. Formation of aromatics by alkyne cyclotrimerization has been proposed to occur via a metallacyclopentadiene intermediate, and the chemistry of COT on reduced TiO 2
A.B Sherrill +3 more
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Calibrated NEXAFS spectra of some common polymers
Journal of Electron Spectroscopy and Related Phenomena, 2003Abstract Near edge X-ray absorption fine structure (NEXAFS) microscopy has evolved into a powerful characterization tool for polymeric materials. The foundation of this utility depends crucially on the sensitivity of NEXAFS to the specific chemical structure of the polymer.
O Dhez, H Ade, S.G Urquhart
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NEXAFS study of electron beam irradiated PET
International Journal of Nanotechnology, 2014One of the most promising methods for surface property modification is electron beam irradiation, which can create new chemical groups on surfaces. In this study we investigated the surface functionalisation of polyethylene terephthalate (PET), a commonly used polymer material with many applications.
Ki jeong Kim, Bongsoo Kim
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Determination of the Electron Escape Depth for NEXAFS Spectroscopy
Langmuir, 2009A novel method was developed to determine carbon atom density as a function of depth by analyzing the postedge signal in near-edge X-ray absorption fine structure (NEXAFS) spectra. We show that the common assumption in the analysis of NEXAFS data from polymer films, namely, that the carbon atom density is constant as a function of depth, is not valid ...
K E, Sohn +5 more
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Adenine adlayers on Cu(111): XPS and NEXAFS study
The Journal of Chemical Physics, 2015The adsorption of adenine on Cu(111) was studied by photoelectron and near edge x-ray absorption fine structure spectroscopy. Disordered molecular films were deposited by means of physical vapor deposition on the substrate at room temperature. Adenine chemisorbs on the Cu(111) surface with strong rehybridization of the molecular orbitals and the Cu 3d ...
Nataliya Tsud +5 more
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Principles, Techniques, and Instrumentation of NEXAFS
1992In this chapter a basic question is addressed: How can the X-ray absorption signal from a single molecular layer on the surface of a bulk material be measured? In particular, electron yield and fluorescence yield detectors and experimental techniques are discussed and specific attention is given to the problems of normalization and background ...
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