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| 2. |
- Andersson, Martin, et al.
(författare)
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Anharmonic resonances in the C-H stretch region of ethoxy adsorbed on W(110): vibrational spectroscopy and calculations
- 2003
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Ingår i: Surface Science. - 0039-6028. ; 532-535, s. 221-226
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Tidskriftsartikel (refereegranskat)abstract
- We show that it is possible to understand and interpret the complex and rich C-H stretch region in the vibrational spectrum of ethoxy adsorbed on W(110) in terms of fundamental C-H stretch modes in Fermi resonance with C-H deformation overtones and combinations. The mode assignment is based on calculated C-13 isotopic shifts for an ethoxy-Cu-5 cluster. The coupling constants have been derived from calculated energy third derivatives of free ethanol and the coupling was implemented by an effective Hamiltonian matrix. The agreement with experiments is very good.
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| 3. |
- Jaworowski, A J, et al.
(författare)
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Determination of NO adsorption sites on Pd(100) using core level photoemission and low energy electron diffraction
- 2002
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Ingår i: Surface Science. - 0039-6028. ; 501:1-2, s. 74-82
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Tidskriftsartikel (refereegranskat)abstract
- The adsorption of NO on Pd(1 0 0) is investigated with high resolution core level spectroscopy and low energy electron diffraction (LEED). Several ordered NO overlayers were observed, in agreement with earlier Studies. Our data clearly show that NO adsorbs in fourfold hollow sites at coverages tip to 0.25 -0.30 monolayer (ML) whereas at 0.5 ML only bridge sites are occupied. By a reinterpretation of previous electron energy loss spectroscopy (EELS) investigations we show that the new site assignments are in agreement the EELS data, Based on the photoemission results for the N 1s and the Pd 3d core levels we propose new structure models for the (2root2 x 2root2)R45degrees and the p(4 x 2) LEED patterns found at coverages of 0.5 and 0.25 ML, respectively. In the latter case, it is suggested that the p(4 x 2) LEED pattern is formed from domains having p(2 x 2)-NO and c(4 x 2)-2NO unit cells.
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| 4. |
- Jaworowski, AJ, et al.
(författare)
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Mn-induced NO dissociation on Pd(100)
- 2002
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Ingår i: Surface Science. - 0039-6028. ; 501:1-2, s. 83-92
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Tidskriftsartikel (refereegranskat)abstract
- The changes in the NO adsorption properties of Pd(1 0 0) due to the addition of Mn have been investigated using high resolution core level photoelectron spectroscopy. The Pd(1 0 0) surface was modified by forming a c(2 x 2)-PdMn surface alloy at two different Mn coverages, giving surfaces partly and fully alloyed, respectively, as shown by scanning tunneling microscopy. NO adsorption on the alloy films was found to destroy the c(2 x 2) structure. Dissociation of the NO molecules upon heating is observed, in stark contrast to NO on the clean Pd(1 0 0) surface from which all the molecules desorb intact upon heating. The dissociation process on the c(2 x 2)-PdMn-(1 x 1)-Pd mixed surface is completed at a significantly higher temperature than for the homogeneous c(2 x 2) surface. It is suggested that Mn atoms give rise to NO dissociation at lower temperatures. whereas Pd atoms situated at c(2 x 2)-(1 x 1) boundaries are responsible for the NO decomposition at higher temperatures.
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| 5. |
- Nistér, M, et al.
(författare)
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The Swedish Biobank for Childhood Tumors
- 2014
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Ingår i: 7th research meeting in Network for NeuroBlastoma and CNS-tumor research in children, Hässelby, Stockholm, November 10-11, 2014..
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Konferensbidrag (refereegranskat)
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