SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Bruhwiler PA) "

Sökning: WFRF:(Bruhwiler PA)

  • Resultat 1-43 av 43
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Ahuja, R, et al. (författare)
  • Theoretical and experimental study of the graphite 1s x-ray absorption edges
  • 1996
  • Ingår i: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. - 0163-1829. ; 54:20, s. 14396-14404
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Theoretical calculations in combination with experiments for the pi* and sigma* x-ray absorption edges are reported for graphite. Theory and experiment agree well for the leading pi* and sigma* resonances. By comparing theoretical calculations for a singl
  •  
2.
  • 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
  •  
3.
  • 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
  •  
4.
  • 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
  •  
5.
  • 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
  •  
6.
  •  
7.
  •  
8.
  •  
9.
  • 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
  •  
10.
  •  
11.
  • Johansson, MKJ, et al. (författare)
  • Adsorption of C-60 on Al(111) studied with scanning tunnelling microscopy
  • 1998
  • Ingår i: SURFACE SCIENCE. - : ELSEVIER SCIENCE BV. - 0039-6028. ; 397:1-3, s. 314-321
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Scanning tunnelling microscopy has been used to study the adsorption and interactions of C-60 on Al(111) at room temperature. Initially, C-60 forms chains of molecules on the lower terraces of step edges, which indicates that the molecules have a high mob
  •  
12.
  • Johansson, MKJ, et al. (författare)
  • Scanning tunneling microscopy of C-60/Al(111)-6x6: Inequivalent molecular sites and electronic structures
  • 1996
  • Ingår i: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. - 0163-1829. ; 54:19, s. 13472-13475
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We present a scanning tunneling microscopy and spectroscopy (STM/S) study of a thermally stable, annealed monolayer of C-60 On Al(111). The C-60 molecules are arranged into a close-packed hexagonal layer of 2 root 3 x 2 root 3 periodicity with the symmetr
  •  
13.
  • 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
  •  
14.
  • Maxwell, AJ, et al. (författare)
  • C 1s ionisation potential and energy referencing for solid C-60 films on metal surfaces
  • 1996
  • Ingår i: CHEMICAL PHYSICS LETTERS. - : ELSEVIER SCIENCE BV. - 0009-2614. ; 260:1-2, s. 71-77
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We present a measurement of the C Is ionisation potential (IP) for solid C-60, as well as a reliable determination of the highest occupied molecular orbital (HOMO) IP. The difference between the gas phase and solid state measurements for the HOMO agrees w
  •  
15.
  • MAXWELL, AJ, et al. (författare)
  • C-60 ON AL(111) - COVALENT BONDING AND SURFACE RECONSTRUCTION
  • 1995
  • Ingår i: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. ; 52:8
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • We present photoemission and C 1s photoabsorption data for an annealed monolayer C-60/Al(111), which show that a strong covalent bond is formed between the C-60 molecules and the substrate. Low-energy electron-diffraction and scanning tunneling microscopy
  •  
16.
  • Maxwell, AJ, et al. (författare)
  • Electronic and geometric structure of C-60 on Al(111) and Al(110)
  • 1998
  • Ingår i: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMERICAN PHYSICAL SOC. - 0163-1829. ; 57:12, s. 7312-7326
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Two new ordered monolayer phases of C-60 on Al surfaces have been studied using electron spectroscopies and low-energy electron diffraction (LEED). On Al(111), in addition to the previously reported (6x6) phase formed by evaporating with T-sample=620 K, a
  •  
17.
  • Maxwell, AJ, et al. (författare)
  • Electronic structure study of KxC60 compounds with x>6
  • 1995
  • Ingår i: CHEMICAL PHYSICS LETTERS. - : ELSEVIER SCIENCE BV. ; 247:3, s. 257-263
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We present C 1s X-ray absorption and photoemission results for KxC60 with x > 6, the so-called 'superfullerides'. These are the first measurements of the unoccupied valence band for these systems and confirm that more than six electrons can be transferred
  •  
18.
  • Maxwell, AJ, et al. (författare)
  • Length scales in core level excitation: C 1s x-ray absorption of C-60/Al
  • 1997
  • Ingår i: PHYSICAL REVIEW LETTERS. - : AMER INST PHYSICS. - 0031-9007. ; 79:8, s. 1567-1570
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We present evidence for atomic site-dependent excitonic effects in the x-ray absorption spectrum of an ordered chemisorbed monolayer of C-60/Al(110). We observe that the broadening in the 5t(1u)-derived resonance and the corresponding core level resonant
  •  
19.
  • O'Shea, JN, et al. (författare)
  • Hydrogen-bond induced surface core-level shift in isonicotinic acid
  • 2001
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Intermolecular hydrogen-bonding in thick films of isonicotinic acid evaporated onto rutile TiO2(110) has been investigated with X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). The rate of deposition is found to be a key fac
  •  
20.
  • O'Shea, JN, et al. (författare)
  • Hydrogen-bond induced surface core-level shift in pyridine carboxylic acids
  • 2001
  • Ingår i: SURFACE SCIENCE. - : ELSEVIER SCIENCE BV. - 0039-6028. ; 486:3, s. 157-166 Language: English
  • Tidskriftsartikel (refereegranskat)abstract
    • Intermolecular hydrogen bonding in thick films of pyridine carboxylic acids (isonicotinic; picolinic and bi-isonicotinic acid) evaporated onto rutile TiO2(1 1 0) has been investigated with X-ray photoelectron spectroscopy and X-ray absorption spectroscopy
  •  
21.
  • O'Shea, JN, et al. (författare)
  • X-ray photoelectron spectroscopy of low surface concentration mass-selected Ag clusters
  • 2000
  • Ingår i: JOURNAL OF CHEMICAL PHYSICS. - : AMER INST PHYSICS. - 0021-9606. ; 113:20, s. 9233-9238
  • Tidskriftsartikel (refereegranskat)abstract
    • We have developed an experimental setup for the study of small mass-selected clusters delivered by soft landing to a model oxide support. An automated deposition system to achieve accurately quantified homogeneous surfaces is described which also overcome
  •  
22.
  • 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
  •  
23.
  • 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
  •  
24.
  • Puglia, Carla, et al. (författare)
  • Core level spectroscopy study of N-2 adsorbed on (2x2)K/graphite
  • 1998
  • Ingår i: SURFACE SCIENCE. - 0039-6028. ; 414:1-2, s. 118-130
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We report a study of N-2/(2 x 2)K/graphite at 25 K using X-ray photoemission, X-ray absorption (XAS), ultraviolet photoemission, autoionization and Auger spectroscopies. At this temperature me found that N-2 physisorbs. Comparisons with the physisorbed sy
  •  
25.
  •  
26.
  • Puglia, C, et al. (författare)
  • XPS and XAS study of oxygen coadsorbed with a dispersed phase of K on graphite
  • 2001
  • Ingår i: SURFACE SCIENCE. - : ELSEVIER SCIENCE BV. ; 488:1-2
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • The adsorption of O-2 onto a dispersed (low coverage) phase of K on graphite has been characterized by X-ray photoemission and X-ray absorption spectroscopy. We identify two oxygen adsorption phases before physisorbed oxygen appears. The first species dom
  •  
27.
  • Reimann, CT, et al. (författare)
  • Oxidative etching of Ta-cluster-ion-bombarded highly-oriented pyrolytic graphite
  • 1997
  • Ingår i: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - : ELSEVIER SCIENCE BV. - 0168-583X. ; 122:3, s. 343-346
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Bombardment of highly-oriented pyrolytic graphite by energetic monomer and cluster ions (555 eV/atom Ta-1(+), Ta-2(+), Ta-4(+) or Ta-9(+)) is used to introduce surface defects which, after baking in air at approximate to 630 degrees C, nucleate oxidation
  •  
28.
  •  
29.
  • Rotenberg, E, et al. (författare)
  • Local-field effects on photoemission of C-60
  • 1996
  • Ingår i: PHYSICAL REVIEW B-CONDENSED MATTER. - 0163-1829. ; 54:8, s. R5279-R5282
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The surface core-level shift in C 1s soft x-ray photoemission spectroscopy has been experimentally observed in films of C-60 on Al. A value of 0.100+/-0.025 eV has been determined. Theoretical calculations are presented which show that the core hole is un
  •  
30.
  • 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
  •  
31.
  • 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
  •  
32.
  • 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
  •  
33.
  •  
34.
  •  
35.
  • Schiessling, J, et al. (författare)
  • Bulk and surface charge states of K3C60
  • 2005
  • Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 71:16
  • Tidskriftsartikel (refereegranskat)abstract
    • We detect a significant angle-dependence in the core level and valence line shapes of photoelectron spectra of single crystal K3C60. This allows the identification of bulk and surface components in the data, and allows us to explain the anomalous line shapes observed for this system. The states near the Fermi level are associated with the bulk of the sample. There is strong evidence of an insulating surface layer, which we ascribe to intermolecular electron correlations. These results simplify the interpretation of previous, apparently conflicting observations.
  •  
36.
  • Schiessling, J, et al. (författare)
  • Insulating surface layer on single crystal K3C60
  • 2004
  • Ingår i: European Physical Journal B. Condensed Matter and Complex Systems. - : Springer Science and Business Media LLC. - 1434-6028. ; 41:4, s. 435-438
  • Tidskriftsartikel (refereegranskat)abstract
    • Using angle-dependent photoemission spectra of core and valence levels we show that metallic, single crystal K3C60 is terminated by an insulating or weakly-conducting surface layer. We attribute this to the effects of strong intermolecular correlations combined with the average surface charge state. Several controversies on the electronic structure are thereby resolved.
  •  
37.
  • Schiessling, J, et al. (författare)
  • Origin of molecular orbital splitting of C-60 on Al(110)
  • 2004
  • Ingår i: Journal of Physics: Condensed Matter. - 1361-648X. ; 16:36, s. 407-414
  • Tidskriftsartikel (refereegranskat)abstract
    • We have investigated the C-60 monolayer on Al(l 10) with angle-dependent photoelectron spectroscopy. We find that orbital components have different angular distributions. Calculations of cross sections of the highest occupied molecular orbital components for free, oriented C-60 are found to describe the experimental data quite well. The observed band splitting is attributed to intramolecular electronic correlations, due to the different coupling of the orbital components to the substrate conduction band.
  •  
38.
  • Schiessling, J, et al. (författare)
  • Polarization-dependent angular photoelectron distribution of solid C-60
  • 2003
  • Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121 .- 1550-235X. ; 68:20
  • Tidskriftsartikel (refereegranskat)abstract
    • We present angle- and polarization-dependent photoelectron spectra of solid C-60 recorded over a large range of emission angles. The bands derived from the three highest molecular orbitals are very similar in their angular distribution and show a strong dependence on both light polarization direction and sample orientation. We show that a molecular emission pattern modified by solid-state effects accounts for the observations.
  •  
39.
  • Schnadt, J, et al. (författare)
  • Alignment of valence photoemission, x-ray absorption, and substrate density of states for an adsorbate on a semiconductor surface
  • 2003
  • Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 67:23
  • Tidskriftsartikel (refereegranskat)abstract
    • A method for determining the placement of x-ray absorption data into an experimental density of states for an adsorbate-semiconductor system is motivated and illustrated with the cases of bi-isonicotinic acid, isonicotinic acid, and benzoic acid on rutile TiO2(110). Special attention is paid to experimental aspects, as well as the role of Z+1 effects and the choice of reference level.
  •  
40.
  • Schnadt, J, et al. (författare)
  • Electron-spectroscopy study of LiC60: Charge transfer and dimer formation
  • 2000
  • Ingår i: PHYSICAL REVIEW B. - : AMERICAN PHYSICAL SOC. - 0163-1829. ; 62:7, s. 4253-4256
  • Tidskriftsartikel (refereegranskat)abstract
    • Li-C-60 compounds LixC60 were studied for average Li concentration (x) over bar less than or equal to 1 using photoelectron spectroscopy. Strong evidence is found for the formation of LiC60 dimers, as well as a second phase. The study suggests that the sm
  •  
41.
  • Schnadt, J, et al. (författare)
  • Excited-state charge transfer dynamics in systems of aromatic adsorbates on TiO2 studied with resonant core techniques
  • 2003
  • Ingår i: Journal of Chemical Physics. - : AIP Publishing. - 0021-9606 .- 1089-7690. ; 119:23, s. 12462-12472
  • Tidskriftsartikel (refereegranskat)abstract
    • Resonant core spectroscopies are applied to a study of the excited electron transfer dynamics on a low-femtosecond time scale in systems of aromatic molecules (isonicotinic acid and bi-isonicotinic acid) adsorbed on a rutile TiO2(110) semiconductor surface. Depending on which adsorbate state is excited, the electron is either localized on the adsorbate in an excitonic effect, or delocalizes rapidly into the substrate in less than 5 fs (3 fs) for isonicotinic acid (bi-isonicotinic acid). The results are obtained by the application of a variant of resonant photoemission spectroscopy. (C) 2003 American Institute of Physics.
  •  
42.
  • Schnadt, Joachim, et al. (författare)
  • Structural study of adsorption of isonicotinic acid and related molecules on rutile TiO2(110) I: XAS and STM
  • 2003
  • Ingår i: Surface Science. - 0039-6028. ; 540:1, s. 39-54
  • Tidskriftsartikel (refereegranskat)abstract
    • X-ray absorption spectroscopy (XAS) and scanning tunneling microscopy (STM) have been used to study the absorption of monolayers of the pyridinecarboxylic acid monomers (isonicotinic acid, nicotinic acid, and picolinic acid) and benzoic acid on a rutile TiO2(1 1 0) surface. We find that the pyridine and phenyl rings are oriented with their planes largely perpendicular to the surface. The azimuthal orientations are strongly influenced by adsorbate-adsorbate interactions, which in each case leads to at least two different molecular species. In order to reach this conclusion a detailed strategy has been developed for the interpretation of angle-dependent XAS data, which does not rely on any curve fitting procedures. (C) 2003 Elsevier B.V. All rights reserved.
  •  
43.
  • Schnadt, J, et al. (författare)
  • Structural study of adsorption of isonicotinic acid and related molecules on rutile TiO2(110) II: XPS
  • 2003
  • Ingår i: Surface Science. - : Elsevier BV. - 0039-6028. ; 544:1, s. 74-86
  • Tidskriftsartikel (refereegranskat)abstract
    • The adsorption of monolayers of the pyridine-carboxylic acid monomers (isonicotinic acid, nicotinic acid, and picolinic acid) on rutile TiO2(1 1 0) has been studied by means of X-ray photoemission spectroscopy. An investigation of the O 1s spectra shows that the molecular carboxylic groups are deprotonated and, hence, that the molecules bind to the surface in a bidentate mode. Moreover, the binding energy of those core levels that are related to the pyridine ring atoms shift as a function of molecule relative to the substrate O 1s and Ti 3p levels, while the position of the core levels related to emission from the carboxylic group are constant relative to the substrate levels. The molecule-dependent shifts are attributed to local intermolecular interactions that determine the proximity of adjacent molecular rings and thus the core-hole screening response of the neighbouring molecules. We propose a simple molecular arrangement for each case which satisfies the known constraints. (C) 2003 Elsevier B.V. All rights reserved.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-43 av 43

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy