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Träfflista för sökning "WFRF:(Martensson A.) srt2:(1995-1999)"

Sökning: WFRF:(Martensson A.) > (1995-1999)

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1.
  • Andersson, S, et al. (författare)
  • CO dissociation characteristics on size-distributed rhodium islands on alumina model substrates
  • 1998
  • Ingår i: JOURNAL OF CHEMICAL PHYSICS. - : AMER INST PHYSICS. - 0021-9606. ; 108:7, s. 2967-2974
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The dissociation of CO on size-distributed Rh particles supported on a thin alumina film has been studied with high resolution X-ray Photoelectron Spectroscopy (XPS) and X-ray Absorption Spectroscopy (XAS). Adsorbed CO dissociates upon heating to temperat
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2.
  • Andersson, S, et al. (författare)
  • Metal-oxide interaction for metal clusters on a metal-supported thin alumina film
  • 1999
  • Ingår i: SURFACE SCIENCE. - : ELSEVIER SCIENCE BV. ; 442:1
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • The interaction between deposited metal clusters and a thin model alumina film grown on NiAl(110) have been studied using X-ray absorption spectroscopy (XAS) and core and valence photoelectron spectroscopy. A lower limit for the fundamental gap of the sup
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3.
  • Andersson, S, et al. (författare)
  • Temperature dependent XPS study of CO dissociation on small Rh particles
  • 1998
  • Ingår i: VACUUM. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0042-207X. ; 49:3, s. 167-170
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We have used temperature dependent X-ray Photoelectron Spectroscopy (XPS) to study the heating-induced CO dissociation on oxide-supported Rh particles through observation of changes undergone by the adsorbate CO and the formation of atomic carbon from the
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4.
  • Bennich, P, et al. (författare)
  • Photoemission study of K on graphite
  • 1999
  • Ingår i: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMERICAN PHYSICAL SOC. - 0163-1829. ; 59:12, s. 8292-8304
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The physical and electronic structure of the dispersed and (2 x 2) phases of K/graphite have been characterized by valence and core-level photoemission. Charge transfer from K to graphite is found to occur at all coverages, and includes transfer of charge
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5.
  • Fohlisch, A, et al. (författare)
  • Beyond the chemical shift: Vibrationally resolved core-level photoelectron spectra of adsorbed CO
  • 1998
  • Ingår i: PHYSICAL REVIEW LETTERS. - : AMERICAN PHYSICAL SOC. - 0031-9007. ; 81:8, s. 1730-1733
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Vibrational fine structure has been observed in the Cls and O1s photoelectron lines of CO adsorbed on Ni(100). This allows a detailed separation of vibrational and electronic contributions to the line profile. The main line is found to represent the fully
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6.
  • Fohlisch, A, et al. (författare)
  • Franck-Condon breakdown in core-level photoelectron spectroscopy of chemisorbed CO
  • 1999
  • Ingår i: CHEMICAL PHYSICS LETTERS. - : ELSEVIER SCIENCE BV. - 0009-2614. ; 315:3-4, s. 194-200
  • Tidskriftsartikel (refereegranskat)abstract
    • The photon energy dependence of the vibrational fine structure in the Cls and Ols X-ray photoelectron main lines of chemisorbed CO on Ni(100) and Ru(0001) has been measured from 6 to 150 eV above the core-level thresholds. Significant deviations from the
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7.
  • Fohlisch, A, et al. (författare)
  • Vibrational fine structure in core level photoelectron lines of adsorbed molecules: System dependent effects
  • 1999
  • Ingår i: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. - 0368-2048. ; 103, s. 303-308
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • System dependent effects in resolving vibrational fine structure in the corn-level lines of adsorbates are discussed. The example is carbon monoxide on transition metals. The importance of dynamic metallic screening is exemplified and the role of shake-up
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8.
  • Frank, M, et al. (författare)
  • Particle size dependent CO dissociation on alumina-supported Rh: a model study
  • 1997
  • Ingår i: CHEMICAL PHYSICS LETTERS. - : ELSEVIER SCIENCE BV. - 0009-2614. ; 279:1-2, s. 92-99
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Via deposition of Ph from the gas phase onto a thin, well-ordered alumina film we have prepared various of alumina-supported Rh particle systems. The morphologies and particle sizes have been characterised with spot profile analysis LEED and STM measureme
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11.
  • Patthey, L, et al. (författare)
  • Adsorption of bi-isonicotinic acid on rutile TiO2(110)
  • 1999
  • Ingår i: JOURNAL OF CHEMICAL PHYSICS. - 0021-9606. ; 110:12, s. 5913-5918
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Bi-isonicotinic acid (2,2'-bipyridine- 4,4'-dicarboxylic acid) is the ligand of several organometallic dyes, used in photoelectrochemical applications. Therefore the atomic scale understanding of the bonding of this molecule to rutile TiO2(110) should giv
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12.
  • Sandell, A, et al. (författare)
  • Bonding of an isolated K atom to a surface: Experiment and theory
  • 1997
  • Ingår i: PHYSICAL REVIEW LETTERS. - : AMER INST PHYSICS. - 0031-9007. ; 78:26, s. 4994-4997
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We present a new and general technique with which the local properties of the unoccupied states of an adsorbed alkali atom in the low coverage limit can be studied. The method, based on a combination of experimental core level spectroscopy data and calcul
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13.
  • Sandell, A, et al. (författare)
  • Electron spectroscopy studies of small deposited metal particles
  • 1995
  • Ingår i: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. ; 76, s. 301-306
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The Al2O3/NiAl(110) system with and without Pd clusters on the surface has been studied using photoemission of both core and valence levels. Pd has been deposited under various conditions, and changes in the spectra due to differences in growth modes are
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14.
  • Sandell, A, et al. (författare)
  • Nature of the ns-derived states for an isolated alkali atom on a surface
  • 1999
  • Ingår i: SURFACE SCIENCE. - : ELSEVIER SCIENCE BV. - 0039-6028. ; 429:1-3, s. 309-319
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • It has recently been shown (for K/graphite) that experimental core level spectroscopy data for adsorbed Ar combined with calculations is a most valuable tool in order to obtain information about the alkali-derived unoccupied density-of-states [A. Sandell
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17.
  • Thylen, A, et al. (författare)
  • Immunohistochemical differences between hyaluronan- and non-hyaluronan-producing malignant mesothelioma
  • 1997
  • Ingår i: The European respiratory journal. - : European Respiratory Society (ERS). - 0903-1936 .- 1399-3003. ; 10:2, s. 404-408
  • Tidskriftsartikel (refereegranskat)abstract
    • In many but not all cases, malignant mesothelioma is associated with an elevated content of hyaluronan in pleural fluid. The hyaluronan-producing mesothelioma has not yet been immunohistochemically characterized; therefore, the purpose of this study was to compare the immunohistochemical reactivity patterns in relation to the ability of this tumour to produce hyaluronan. Pleural fluid samples from 33 patients with malignant mesothelioma were analysed for content hyaluronan using a quantitative high performance liquid chromatographic method. Biopsy specimens from the patients were studied immunohistochemically, using monoclonal antibodies against carcinoembryonic antigen (CEA), epithelial membrane antigen (EMA), a low molecular weight cytokeratin antigen (CAM 5.2) and vimentin. An elevated hyaluronan content, i.e. > 100 mg.L-1, was noted in 23 patients (70%). There was no reactivity to the monoclonal antibody raised against CEA in any case. There was a significantly higher reactivity to EMA (p = 0.026), a higher reactivity to CAM 5.2 (p = 0.053) and a lower reactivity to vimentin (p = 0.057) in the hyaluronan-producing mesotheliomas as compared to those with normal levels of hyaluronan. Mesotheliomas that produced hyaluronan differed immunohistochemically from those that did not. The connection between the ability to produce different antigens and hyaluronan may relate to the degree of differentiation of the tumour. Both of these characteristics (immunophenotype and ability to produce hyaluronan) may, therefore, be of importance in studies concerning the prognosis and treatment of the malignant mesothelioma.
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18.
  • Weinelt, M, et al. (författare)
  • Resonant photoemission at the 2p edges of Ni: Resonant Raman and interference effects
  • 1997
  • Ingår i: PHYSICAL REVIEW LETTERS. - 0031-9007. ; 78:5, s. 967-970
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Unambiguous evidence for resonant photoemission in Ni is presented. Interference effects are identified at the 2p edges for the valence band and the 6 eV satellite. A rapid transition from a resonant Raman to an Auger-like regime shows that the core-excit
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21.
  • Denecke, R, et al. (författare)
  • Beamline I511 at MAX II, capabilities and performance
  • 1999
  • Ingår i: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. - 0368-2048. ; 103, s. 971-977
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The new undulator beamline I511 at MAX-lab, now under commissioning, has been optimized for X-ray emission and photoelectron spectroscopies. Using an SX-700 high flux monochromator the accessible photon energy range is from 90 eV to about 1500 eV. The per
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24.
  • Karis, O, et al. (författare)
  • One-step and two-step description of deexcitation processes in weakly interacting systems
  • 1996
  • Ingår i: PHYSICAL REVIEW LETTERS. - : AMER INST PHYSICS. ; 76:8, s. 1380-1383
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The origin of one- and two-step behavior of core-hole decay processes is identified in connection with high resolution autoionization spectra for Ar/Pt(111). The spectra simultaneously show features of the two types (resonant Raman vs Auger-like behavior)
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25.
  • Lemke, L, et al. (författare)
  • Magnetic extended x-ray absorption fine structure at the L-3,L-2 edges of 3d elements
  • 1998
  • Ingår i: JOURNAL OF PHYSICS-CONDENSED MATTER. - : IOP PUBLISHING LTD. - 0953-8984. ; 10:8, s. 1917-1930
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We report normal and magnetic extended x-ray absorption fine-structure (EXAFS) measurements made on 30 ML Fe films on Cu(001) substrates at the L-3,L-2 edges. The magnetic EXAFS at the L edges of 3d metals is particularly important as it can be used to pr
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26.
  • Libuda, J, et al. (författare)
  • Interaction of rhodium with hydroxylated alumina model substrates
  • 1997
  • Ingår i: SURFACE SCIENCE. - : ELSEVIER SCIENCE BV. - 0039-6028. ; 384:1-3, s. 106-119
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • In order to investigate how metal growth and metal-oxide interaction depend on the chemical properties of oxide surfaces, we describe a modification procedure which allows the introduction of surface hydroxyl groups on a well-ordered Al2O3 film on NiAl(II
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27.
  • Lloyd-Spets, Anita, et al. (författare)
  • Current status of silicon carbide based high-temperature gas sensors
  • 1999
  • Ingår i: IEEE Transactions on Electron Devices. - 0018-9383 .- 1557-9646. ; 46:3, s. 561-566
  • Tidskriftsartikel (refereegranskat)abstract
    • Silicon carbide (SIC) based field effect gas sensors can be operated at very high temperatures. Catalytic metal-insulator-silicon carbide (MISiC) Schottky diodes respond very fast to a change between a reducing and an oxidizing atmosphere, and cylinder-specific combustion engine monitoring has been demonstrated. The sensors have also been suggested for high-temperature electronic nose applications. Car applications and other harsh environments put very strong requirements on the long-term stability of the sensors. Here rye review the current status of the field of SiC based Schottkg diode gas sensors with emphasis on the work in our group. Basic work on understanding of the detection mechanism and the influence of interfacial layers on the long-term stability of the sensors is reviewed, The direction of future research and device development in our group is also discussed.
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28.
  • Martensson, B, et al. (författare)
  • Alternative treatment for poststroke depression
  • 1997
  • Ingår i: The American journal of psychiatry. - : American Psychiatric Association Publishing. - 0002-953X .- 1535-7228. ; 154:4, s. 583-584
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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30.
  • Martensson, N, et al. (författare)
  • Coherent and incoherent processes in resonant photoemission
  • 1997
  • Ingår i: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING. - 0947-8396. ; 65:2, s. 159-167
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The basis for resonant photoemission is discussed in connection with data for a physisorption system, Ar/Pt(111) and a 3d transition metal, Ni(100). For Ar/Pt(111) the quasi-localized character of the intermediate state leads to two types of features in t
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31.
  • Martensson, N, et al. (författare)
  • On the origin of core-level binding energy shifts
  • 1995
  • Ingår i: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. ; 75, s. 209-223
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We present a general discussion of chemical shifts in core-level photoelectron spectroscopy. There are two different starting points that are commonly used for describing the important ingredients in the chemical shifts. In the first approach one starts o
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32.
  • Martensson, N, et al. (författare)
  • Resonant processes in the soft X-ray regime
  • 1999
  • Ingår i: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. - 0368-2048. ; 100, s. 379-393
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The phenomenon of resonant excitation of X-ray and electron emission spectra is discussed. The basic phenomena are demonstrated for Ni metal. The importance of the localization of the intermediate state is discussed in connection with spectra for adsorbed
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35.
  • NILSSON, A, et al. (författare)
  • INITIAL AND FINAL-STATE RULES IN X-RAY SPECTROSCOPIES OF ADSORBATES
  • 1995
  • Ingår i: PHYSICA B. - : ELSEVIER SCIENCE BV. - 0921-4526. ; 209:1-4, s. 19-22
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The so-called ''initial and final state rules'' for X-ray absorption spectroscopy (XAS) and X-ray emission spectroscopy (XES) are applied to CO on Ni(1 0 0). In XAS the final state core hole strongly modifies the distribution of unoccupied valence states
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38.
  • Puglia, C, et al. (författare)
  • A photoemission and XAS study of oxygen coadsorbed with a (2x2) layer of K on graphite
  • 1997
  • Ingår i: SURFACE SCIENCE. - : ELSEVIER SCIENCE BV. - 0039-6028. ; 383:2-3, s. 149-161
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We have studied the coadsorption of oxygen with a (2 x 2) monolayer of K on graphite. At least three different adsorption phases for oxygen have been found. Different spectroscopic techniques have been used in order to identify the different oxygen specie
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41.
  • Qvarford, M, et al. (författare)
  • Doping dependence of the O 1s is core-level photoemission in bi-Sr-Ca-Cu-O superconductors
  • 1996
  • Ingår i: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. - 0163-1829. ; 53:22, s. 14753-14756
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The O 1s core level of three different Bi-Sr-Ca-Cu-O superconductors has been studied by means of high-resolution x-ray-photoelectron spectroscopy (XPS) and x-ray absorption spectroscopy (XAS). The O 1a XPS spectra could be decomposed into three component
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42.
  • Sandell, A, et al. (författare)
  • Interaction of CO with Pd clusters supported on a thin alumina film
  • 1996
  • Ingår i: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS. - : AMER INST PHYSICS. ; 14:3, s. 1546-1551
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The adsorption of CO on Pd particles supported on a thin alumina film has been studied employing high resolution x-ray photoelectron spectroscopy (XP-S) and x-ray absorption spectroscopy (XAS), and of special interest was the CO-Pd interaction as a functi
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  • Srivastava, P, et al. (författare)
  • Magnetic extended x-ray absorption fine structure at the L-3,L-2 edges of Fe and Co on Cu(001)
  • 1998
  • Ingår i: JOURNAL OF APPLIED PHYSICS. - : AMER INST PHYSICS. - 0021-8979. ; 83:11, s. 7025-7027
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We report magnetic extended x-ray absorption fine structure (EXAFS) measurements on 30 monolayer Fe and Co films on Cu(001) substrates at L-3,L-2 edges. For 3d transition metals, the magnetic EXAFS at the L edges is of great interest since it probes final
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