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  • 1
    Electronic Resource
    Electronic Resource
    Reaction of atomically clean aluminum and chemically modified aluminum with alkyl halides (1987)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 109 (1987), S. 1726-1729 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00240a021
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Infrared spectroscopic study of the rotation of chemisorbed methoxy species on an alumina surface (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 5119-5126 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We present experimental and calculated vibration–rotation spectra as a function of temperature for the methoxy species (–OCH3 and –OCD3) chemisorbed on an alumina surface. The axis of rotation is the C–O bond axis. The model for our calculations is that of free rotation, and we describe the methods employed here in full detail. The qualitative agreement between the calculated and experimental spectra suggests that the adsorbed methoxy species is undergoing free rotational motion about the C–O bond axis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458545
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Infrared spectroscopic observations of hydrogen bonding and Fermi resonance of adsorbed methyl chloride on alumina surfaces (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 3668-3674 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The physical adsorption of methyl chloride onto Al2O3 surfaces containing surface OH groups has been studied using transmission infrared spectroscopy. Methyl chloride reversibly bonds via hydrogen bonding to the surface hydroxyl groups with a spectroscopically measured heat of adsorption of −3.37±0.38 kcal mol−1. Physisorption of methyl chloride results in a significant reduction in the intensity of the rotational wings of the methyl chloride absorption bands relative to the gas phase, a small downward frequency shift in their band centers, and substantial effects on the ν(OH) region of the alumina spectrum due to hydrogen bonding of surface OH groups with methyl chloride. Fermi resonances are observed for adsorbed methyl chloride and result in the observation of the overtones of both the symmetric and asymmetric methyl deformation modes. It is postulated that the hydrogen-bonded CH3Cl species possess rotational (or other) degrees of freedom which lead to a high entropy in the adsorbed layer, compared to the liquid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452964
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Improvements to atomic force microscopy cantilevers for increased stability (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 4191-4197 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A modification of commercially manufactured atomic force microscopy cantilevers which reduces the bending of the V-shaped legs due to changes in temperature is described. Gold-coated silicon nitride cantilevers are a bimorph system in which the different thermal expansion coefficients of the materials comprising the system can produce a temperature-dependent change in curvature. Other stress-related effects might also be responsible for the observed bending. By removing the gold film and redepositing gold only at the end of the V-shaped legs, a reduction in the bending of the cantilever is accomplished while the required optical reflectivity for the laser deflection system is retained. Imaging x-ray photoelectron spectroscopy, scanning electron microscopy, and changes in the detector photodiode signal related to bending of the cantilever are shown for modified and unmodified tips. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147568
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  • 5
    Electronic Resource
    Electronic Resource
    An ultrahigh vacuum scanning tunneling microscope for surface science studies (1990)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 3769-3775 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe the construction and operation of a scanning tunneling microscope designed in our laboratory that fits standard ultrahigh vacuum (UHV) systems as an add-on instrument. Sample motion is accomplished by electrical signals, eliminating mechanical feedthroughs. Samples are easily transferred to a modified Varian manipulator for heating and interfacing with other surface science techniques. In situ tip replacement and sample transfer in and out of the UHV system is also possible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141551
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  • 6
    Electronic Resource
    Electronic Resource
    An integrated scanning tunneling, atomic force and lateral force microscope (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 85-88 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe the design and operation of a combined scanning tunneling–atomic force–lateral force microscope [(STM), (AFM), (LFM)]. Including these capabilities in a single instrument reduces construction costs and increases flexibility. AFM and LFM may be performed simultaneously; a simple reconfiguration (requiring removing the AFM/LFM cantilever holder and replacing with a STM tip) changes the instrument into a STM. We present atomic forces depicted in force-to-distance curves and experimental imaging applications with all three techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144752
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    Paper (German National Licenses)
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