SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Hofmann S) "

Sökning: WFRF:(Hofmann S)

Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
481.
  •  
482.
  •  
483.
  • Xie, Mengyao, et al. (författare)
  • Effect of Mg doping on the structural and free-charge carrier properties of InN
  • 2014
  • Ingår i: Journal of Applied Physics. - 0021-8979 .- 1089-7550. ; 115:16, s. 163504-
  • Tidskriftsartikel (refereegranskat)abstract
    • We study the structural and free-charge carrier properties of two sets of InN films grown by molecular beam epitaxy doped with different Mg concentrations from 1x1018 cm-3 to 3.9x1021 cm-3. We determine the effect of Mg doping on surface morphology, lattice parameters, structural characteristics and carrier properties. We show that infrared spectroscopic ellipsometry can be used to evidence successful p-type doping in InN, which is an important issue in InN. High resolution X-ray diffraction, combined with atomic force microscopy measurements reveals a drastic decrease in structural quality of the film for Mg concentrations above 1020 cm-3, accompanied with a significant increase in surface roughness. In addition, a decrease of the c-lattice parameter and an increase of the a-lattice parameter are found with increasing Mg concentration. Different contributions to the strain are discussed and it is suggested that the incorporation of Mg leads to a change of growth mode and generation of tensile growth strain. At high Mg concentrations zinc-blende InN inclusions appear which are suggested to originate from higher densities of stacking faults. Infrared spectroscopic ellipsometry analysis shows a reduced LPP-coupling, manifested as a characteristic dip in the IRSE data, and qualitatively different broadening behavior for Mg concentrations between 1.1x1018 cm−3 and 2.9x1019 cm−3 indicate the existence of a p-type conducting bulk InN layer for these Mg concentrations.
  •  
484.
  •  
485.
  • Zweidinger, S., et al. (författare)
  • In situ studies of the oxidation of HCl over RuO2 model catalysts: Stability and reactivity
  • 2010
  • Ingår i: Journal of Catalysis. - : Elsevier. - 1090-2694. ; 272:1, s. 169-175
  • Tidskriftsartikel (refereegranskat)abstract
    • Structure-activity experiments were performed for the HCl oxidation reaction (Deacon-like process) over RuO2 model catalysts - RuO2(1 1 0) and RuO2(1 0 0) - applying in situ surface X-ray diffraction (SXRD) combined with on-line mass spectrometry. The studied model catalysts turned out to be long-term stable under reaction conditions with gas feed ratios p(HCl):p(O-2) ranging from 1:4 to 4:1 in the mbar pressure regime and temperatures as high as 685 K. Even pure HCl exposure in the mbar regime was not able to reduce RuO2 below 600 K; above 650 K chemical reduction of the oxide sets in. Under strongly oxidizing reaction conditions, the (surface) oxides grow slowly in thickness. On-line reactivity experiments of both types of model catalysts in a batch reactor yield a mean turn-over frequency (TOP) of 0.6 Cl-2 molecules per second and active site for the HCl oxidation at 650 K and initial partial pressures of p(HCl) = 2 mbar and p(O-2) = 0.5 mbar. The HCl oxidation over RuO2 is therefore considered to be structure insensitive. (C) 2010 Elsevier Inc. All rights reserved.
  •  
486.
  • Zweidinger, S., et al. (författare)
  • Reaction mechanism of the oxidation of HCl over RuO2(110)
  • 2008
  • Ingår i: Journal of Physical Chemistry C. - : The American Chemical Society (ACS). - 1932-7447. ; 112:27, s. 9966-9969
  • Tidskriftsartikel (refereegranskat)abstract
    • High-resolution core-level shift spectroscopy and temperature-programmed reaction experiments together with density functional theory calculations reveal that the oxidation of HCl with oxygen producing Cl-2 and water proceeds on the chlorine-stabilized RuO2(110)surface via a one-dimensional Langmuir-Hinshelwood mechanism. The recombination of two adjacent chlorine atoms on the catalyst's surface constitutes the rate-determining step in this novel Deacon-like process.
  •  
Skapa referenser, mejla, bekava och länka
Typ av publikation
tidskriftsartikel (464)
konferensbidrag (13)
forskningsöversikt (9)
Typ av innehåll
refereegranskat (470)
övrigt vetenskapligt (16)
Författare/redaktör
Lohse, T. (245)
White, R. (205)
Backes, M. (175)
Berge, D. (170)
Wagner, P. (164)
Hofmann, W. (149)
visa fler...
Iwasaki, H. (144)
Petrucci, P. -O (143)
Salek, D. (140)
Lenain, J. -P (138)
Tavernet, J. -P (137)
Glicenstein, J. F. (135)
Khelifi, B. (134)
Bulik, T. (133)
Boisson, C. (133)
Brun, P. (133)
Fontaine, G. (133)
Moderski, R. (133)
Moulin, E. (133)
Schwanke, U. (133)
Stegmann, C. (133)
Dyks, J. (132)
Egberts, K. (132)
Hermann, G. (132)
Horns, D. (132)
Kosack, K. (132)
Lamanna, G. (132)
de Naurois, M. (132)
Niemiec, J. (132)
Vincent, P. (131)
Aharonian, F. (131)
Hinton, J. A. (131)
Marcowith, A. (131)
Ostrowski, M. (131)
Panter, M. (131)
Pita, S. (131)
Renaud, M. (131)
Rieger, F. (131)
Rudak, B. (131)
Santangelo, A. (131)
Sol, H. (131)
Steenkamp, R. (131)
Terrier, R. (131)
Fiasson, A. (130)
Gallant, Y. A. (130)
Marandon, V. (130)
Ohm, S. (130)
Quirrenbach, A. (130)
Schwemmer, S. (130)
Stawarz, L. (130)
visa färre...
Lärosäte
Lunds universitet (155)
Kungliga Tekniska Högskolan (144)
Linnéuniversitetet (129)
Stockholms universitet (88)
Uppsala universitet (79)
Karolinska Institutet (61)
visa fler...
Umeå universitet (26)
Göteborgs universitet (24)
Linköpings universitet (21)
Chalmers tekniska högskola (8)
Örebro universitet (5)
Luleå tekniska universitet (2)
Högskolan i Borås (2)
Högskolan i Gävle (1)
RISE (1)
Naturhistoriska riksmuseet (1)
visa färre...
Språk
Engelska (484)
Svenska (1)
Tyska (1)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (346)
Medicin och hälsovetenskap (63)
Teknik (19)
Samhällsvetenskap (2)

År

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy