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  • 1
    Electronic Resource
    Electronic Resource
    Neutron diffraction determination of the nuclear spin ordering in Cu and Ag at nano- and subnano-K temperatures (invited) : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5078-5080 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The spontaneous nuclear spin ordering in the simple diamagnetic metals Cu and Ag has been studied by neutron diffraction using the spin dependent part of the nuclear cross section. Simple antiferromagnetic ordering of type I has been found in zero field for these fcc-systems below 60 and 560 pK for Cu and Ag, respectively. The ordering in an applied field has been investigated and the phase diagrams have been determined: a very complex phase diagram with different magnetic structures, strong hysteresis, and time dependence was found for Cu, while in Ag the phase diagram is very simple. Comparison with ab initio calculations allows a rather deep insight into the interactions leading to the ordering. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361579
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  • 2
    Electronic Resource
    Electronic Resource
    Meyer–Neldel behavior of deep level parameters in heterojunctions to Cu(In,Ga)(S,Se)2 (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 2888-2890 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Admittance spectroscopy was measured on Cu(In,Ga)(S,Se)2 thin film and single crystal heterojunctions. The emission rates of defects for various near-stoichiometric compositions follow a Meyer–Neldel rule, showing increasing attempt-to-escape frequencies with increasing defect depth. Defects in highly (In,Ga)-rich material showed lower attempt-to-escape frequencies and follow a separate Meyer–Neldel relation. Repetitive air annealing of a CuInSe2 heterojunction revealed a shift of the depth and capture cross section of an observed defect. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.117352
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  • 3
    Electronic Resource
    Electronic Resource
    High-sensitivity quantitative Kelvin probe microscopy by noncontact ultra-high-vacuum atomic force microscopy (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 286-288 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present quantitative measurements of the work function of semiconductor and metal surfaces prepared in ultrahigh vacuum (UHV) using a combination of UHV noncontact atomic force microscopy and Kelvin probe force microscopy. High energetic and lateral resolution is achieved by using the second resonance frequency of the cantilever to measure the electrostatic forces, while the first resonance frequency is used to simultaneously obtain topographic images by the frequency modulation technique. Spatially resolved work-function measurements reveal a reduced work function in the vicinity of steps on highly oriented pyrolytic graphite. On the GaAs(110) surface it could be demonstrated that defect states in the forbidden band gap cause a local pinning of the Fermi level along monolayer steps. On p-WSe2(0001) work-function variations due to the Coulomb potential of single dopant sites were resolved. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.124357
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  • 4
    Electronic Resource
    Electronic Resource
    Band offsets at the ZnSe/CuGaSe2(001) heterointerface (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 74 (1999), S. 1099-1101 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The formation of the ZnSe/CuGaSe2 heterointerface was studied by x-ray photoelectron spectroscopy (XPS). ZnSe was sequentially grown on CuGaSe2(001) epilayers. In situ photoemission spectra of the Ga 3d and Zn 3d core levels as well as XPS valence bands were acquired after each deposition step. The valence-band offset is determined to be ΔEV=0.6±0.1 eV. As a consequence, a nearly symmetric "type-I" band alignment for the ZnSe/CuGaSe2 heterojunction with a conduction-band offset of ΔEC=0.4±0.1 eV is found. Concerning the band alignment ZnSe can, therefore, be expected to be a suitable buffer material for CuGaSe2-based thin-film solar cells. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.123455
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  • 5
    Electronic Resource
    Electronic Resource
    Spatially distributed p-n heterojunction based on nanoporous TiO2 and CuSCN (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 692-694 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Directed semiconductor growth in nanoporous ceramic films is reported. A p-n heterojunction with an interface that is spatially distributed across the complete thickness of the ceramic film is established. The interface area is estimated to be several 100 times larger than its geometric projection. The p-n junction shows excellent rectification and may serve as the basic building block for photovoltaic devices. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.124484
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  • 6
    Electronic Resource
    Electronic Resource
    True atomic resolution under ambient conditions obtained by atomic force microscopy in the contact mode (1999)
    Springer
    Applied physics 68 (1999), S. 399-402 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 61.16.Ch; 68.35.Bs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 2 ) has been investigated by contact-mode atomic force microscopy (AFM) in air. Both the terraces and the monolayer step itself were reproducibly imaged at atomic resolution in the repulsive-force regime at forces between tip apex and sample of the order of 10-9 N. Several kinks were also imaged at atomic resolution. Details of the atomic registry of subsequent Se-Nb-Se sandwich layers as well as the arrangement of the individual atoms at the kink sites were resolved. The results are in perfect quantitative agreement with the lattice structure known from X-ray analysis and indicate that true atom-by-atom lateral resolution of microscopic defects is feasible by AFM in the contact mode and under ambient conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050912
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  • 7
    Electronic Resource
    Electronic Resource
    Ultraschallbiomikroskopie (UBM) zur Lokalisation der Kunstlinsenhaptik nach transskleraler Nahtfixation (1997)
    Springer
    Der Ophthalmologe 94 (1997), S. 41-44 
    Details
    ISSN: 1433-0423
    Keywords: Schlüsselwörter Ultraschallbiomikroskopie ; Kataraktchirurgie ; Hinterkammerlinsen ; Key words Ultrasound-biomicroscopy ; Cataract-surgery ; Posterior-chamber-lenses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Correct positioning of transscleral haptics for sulcus fixation of IOL haptics may be difficult due to lack of visual control by the surgeon. We determined the haptic sites in eyes which underwent secondary IOL implantation with transscleral suturing using ultrasound biomicroscopy (UBM) (Humphrey Instruments, Inc., San Leandro, CA, USA). Eighteen eyes of 17 patients were included in the study. The follow-up time ranged from 1 to 36 months (mean: 7 months). The positions of 36 IOL-haptics were documented by UBM examination. Twelve haptics (33%) were found in the sulcus, whereas 18 haptics (50%) were located posteriorly to the sulcus. Six haptics (17%) were identified anteriorly to the sulcus. There were no complications resulting from dislocation. In one of the eyes, suture infection occurred requiring surgical revision and antibiotic therapy.
    Notes: Die korrekte Positionierung der Linsenhaptiken bei transskleraler Nahtfixierung ist schwierig, da sich die Nahtführung im Sulcus ciliaris und hinter der Iris der Beobachtung durch den Operateur entzieht. Wir haben 17 Patienten (18 Augen) nach transskleraler Haptikfixierung mit dem Humphrey-Ultrasound-Biomicroscope (UBM) (Humphrey Instruments, San Leandro, CA, USA) untersucht. Die Nachbeobachtungszeit betrug zwischen 1 und 36 Monaten (Mittel: 7 Monate). Neben der Haptikposition wurde der intraokulare Druck registriert. 12 von 36 Haptiken (33%) waren im Sulcus ciliaris lokalisiert. 18 Haptiken (50%) wurden hinter dem Sulkus gefunden. Anteriore Lokalisationen (hintere Iriswurzel) wiesen 6 Haptiken (17%) auf. Komplikationen , die aus diesen Fehlpositionierungen resultieren könnten, sahen wir nicht. In einem Fall trat eine infektiöse Infiltration des Stichkanals auf, die eine operative Revision und systemische Antibiotikagabe notwendig machte.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003470050082
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  • 8
    Electronic Resource
    Electronic Resource
    Necrotizing skin lesions induced by low-molecular-weight heparin after total knee arthroplasty (1997)
    Springer
    Archives of orthopaedic and trauma surgery 116 (1997), S. 443-445 
    Details
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report the unusual complication of focal necrotizing skin lesions accompanied by moderate thrombocytopenia in a female patient undergoing thromboprophylaxis with low-molecular-weight heparin after total knee arthroplasty. Heparin-induced thrombocytopenia was suspected and confirmed using the heparin-induced platelet activation assay. The skin lesions improved gradually after the discontinuation of heparin application. In addition to the description of this exceptionally rare adverse effect of low-molecular-weight heparin, a brief discussion of previously reported cases is provided.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004020050160
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  • 9
    Electronic Resource
    Electronic Resource
    Necrotizing skin lesions induced by low-molecular-weight heparin after total knee arthroplasty (1997)
    Springer
    Archives of orthopaedic and trauma surgery 116 (1997), S. 443-445 
    Details
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report the unusual complication of focal necrotizing skin lesions accompanied by moderate thrombocytopenia in a female patient undergoing thromboprophylaxis with low-molecular-weight heparin after total knee arthroplasty. Heparin-induced thrombocytopenia was suspected and confirmed using the heparin-induced platelet activation assay. The skin lesions improved gradually after the discontinuation of heparin application. In addition to the description of this exceptionally rare adverse effect of low-molecular-weight heparin, a brief discussion of previously reported cases is provided.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00434012
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  • 10
    Electronic Resource
    Electronic Resource
    Peptide growth factors in urology (1995)
    Springer
    World journal of urology 13 (1995), S. 263-263 
    Details
    ISSN: 1433-8726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00185968
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