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As and Ga dimers in core-level spectroscopy of S-passivated GaAs(001) (1996)

Chiaradia, P. ; Paget, D. ; Bonnet, J. E. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 80 (1996), S. 5372-5376

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: We performed a correlated study of sulfide-passivated GaAs(001) surfaces, using x-ray photoelectron spectroscopy and reflection anisotropy spectroscopy. The reflection anisotropy spectra reveal after desorption of the sulfide overlayer the presence of As and Ga dimers analogous to ones observed on As-decapped surfaces. We identify in the 3d core-level spectra the surface components due to As and Ga dimers: their chemical shifts are −0.28 and −0.35 eV, respectively. We propose an interpretation of the main surface components in the framework of a simple model, based on charge neutrality, electron counting, and electronegativity concepts. © 1996 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.363478

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Resection of the radial head and partial open synovectomy of the elbow in the young adult with haemophilia: long-term results (1995)

MERCHAN, E. C. RODRIGUEZ ; GALINDO, E. ; MAGALLON, M. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Haemophilia 1 (1995), S. 0

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ISSN: 1365-2516

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Medicine

Notes: Resection of the radial head and partial open synovectomy of the elbow have been used in the treatment of repeated haemarthroses of the elbows in 15 patients with haemophilia. The indications for the index operation were: severe pain and bleeding in the elbow that occurred in spite of appropriate, episodic, replacement therapy over a period of more than 6 months, associated with hypertrophy of the radial head and a significant loss of pronation-supination.The long-term results were assessed retrospectively according to the classification recommended by the Orthopaedic Advisory Committee of the World Federation of Hemophilia. In the operated group, three patients had a good result, seven were fair, and five poor. It is concluded that this procedure appears to reduce the incidence of haemarthrosis but did not slow the rate of evolution of radiographic changes.