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  • 11
    Electronic Resource
    Electronic Resource
    Lead oxide nanobelts and phase transformation induced by electron beam irradiation (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 309-311 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: β-PbO2 nanobelts, with a rectangular cross section, a typical length of 10–200 μm, a width of 50–300 nm, and a width-to-thickness ratio of 5–10, have been successfully synthesized by simple elevated evaporation of commercial PbO powders at high temperature. The PbO2 nanobelts are enclosed by top surfaces ±(201) and side surfaces ±(101¯) and their growth direction is [010]. Each PbO2 nanobelt is found to have a large polyhedral Pb tip at one of its ends, suggesting the growth is dominated by a vapor–liquid–solid mechanism. Electron beam irradiation of the PbO2 nanobelts results in the phase transformation from PbO2 to PbO and finally to Pb. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1432749
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  • 12
    Electronic Resource
    Electronic Resource
    Side-by-side silicon carbide–silica biaxial nanowires: Synthesis, structure, and mechanical properties (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 77 (2000), S. 3349-3351 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Elevated-temperature synthesis has been used to generate side-by-side biaxially structured silicon carbide–silica nanowires. The axial growth direction approaches [311] for nanowires with a high density of microtwins and is [211] for defect-free nanowires. The structure of these nanowires, their cross-sectional shape, and their structural transformation between a biaxial and coaxial configuration have been studied by transmission electron microscopy. The Young's modulus of the biaxially structured nanowires was measured to be 50–70 GPa depending on the size of the nanowire. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1327281
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  • 13
    Electronic Resource
    Electronic Resource
    Configurations of misfit dislocations at interfaces of lattice-matched Ga0.5In0.5P/GaAs heterostructures (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 77 (2000), S. 223-225 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A configuration of misfit dislocation dipoles is observed in a Ga0.5In0.5P heterostructure grown by solid-source molecular-beam epitaxy on GaAs. The dipole dislocations are mostly of 60° type, separated by ∼3.5 nm. The dislocations are not produced by conventional lattice mismatch, rather, they could be the result of lateral compositional modulation in the Ga0.5In0.5P epilayer. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.126931
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  • 14
    Electronic Resource
    Electronic Resource
    Catalytically active nickel {110} surfaces in growth of carbon tubular structures (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 1255-1257 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Recent interest in the growth of aligned carbon nanotube films using transition metal catalysts has led to questions concerning the growth mechanism involved. In our experiment carbon tubules grown using Ni catalysts exhibit a preferred orientation relative to the catalytically active surfaces of Ni. The axial directions of the tubular structure are mainly parallel to the 〈110〉 and 〈042〉 directions of Ni. The faceted shape of the Ni particles determines the intrinsic structure of the tubules. A mechanism involving spiral growth is proposed to explain the nucleation and growth of such tubules. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.126001
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  • 15
    Electronic Resource
    Electronic Resource
    Tetrakis(μ-DL-alanine-O:O')octaaquadierbium(III) Hexaperchlorate (1995)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 51 (1995), S. 1565-1568 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270194013752
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  • 16
    Electronic Resource
    Electronic Resource
    Modified multislice theory for calculating the energy-filtered inelastic images in REM and HREM (1989)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 45 (1989), S. 193-199 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Inelastic plasmon diffuse scattering (PDS) is treated as an effective position-dependent potential perturbing the incident electron wavelength in a solid surface, resulting in an extra phase grating term in the slice transmission function. This potential is derived for the geometry of reflection electron microscopy (REM) and high-resolution electron microscopy (HREM). The energy-filtered inelastic images can be calculated following the routine image simulation procedures by using different slice transmission functions for the elastic and inelastic waves, by considering the 'transitions' of the elastic scattered electrons to the inelastic scattered electrons. It is predicted that the inelastic scattering could modify the electron intensity distribution at a surface. It is possible to take high-resolution energy-filtered inelastic images of crystals, the resolution of which is about the same as that taken from the elastic scattered electrons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767388011511
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  • 17
    Electronic Resource
    Electronic Resource
    Multiple inelastic scattering in high-energy electron diffraction and imaging (1991)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 47 (1991), S. 686-698 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A dynamical multiple elastic and inelastic electron scattering theory is proposed and is applied to the plural scattering cases of phonon, single-electron and valence (or plasmon) excitations. The incoherence of all the possible inelastic scattering processes of different energies and momenta is evaluated analytically before any numerical calculations. The effects of multiple scattering are equivalent partially to the broadening of the scattering function of a single inelastic process by those of others and partially to the re-scattering of the Kikuchi pattern produced in one inelastic process by others. The final diffraction pattern is a convoluted result of those Kikuchi patterns produced by different inelastic scattering processes. All these characteristics can be considered in just one single formula. The theory of multiple-phonon excitations in simulating high-angle annular-dark-field (ADF) scanning transmission electron-microscopy (STEM) images is proposed. It is shown that the single-phonon scattering model is a good approximation except at the points close to atomic nuclei if the electron probe is comparable in size to that of an atom. The higher-order phonon scattering may improve the resolution of the ADF STEM images of thin crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767391005524
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  • 18
    Electronic Resource
    Electronic Resource
    A multislice theory of electron inelastic scattering in a solid (1989)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 45 (1989), S. 636-644 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A multislice theory is proposed to solve Yoshioka's coupling equations for elastic and inelastic scattered high-energy electrons in a solid. This method is capable, in principle, of including the non-periodic crystal structures and the electron multiple scattering among all the excited states in the calculations. It is proved that the proposed theory for calculating the energy-filtered inelastic images [Wang (1989). Acta Cryst. A45, 193-199], based on the physical optics approach, is equivalent to the quantum-mechanical theory under some approximations. The basic theory of simulating the energy-filtered inelastic image of core-shell losses and thermal diffuse scattering is outlined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767389005453
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  • 19
    Electronic Resource
    Electronic Resource
    Dynamical simulations of energy-filtered inelastic electron diffraction patterns (1992)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 48 (1992), S. 674-688 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The previously proposed inelastic scattering theory [Wang (1991). Acta Cryst. A47, 686–698] has been applied to simulate the diffraction patterns of phonon, plasmon-loss and atomic core-shell scattered electrons. The details of the calculation method and the program flow chart are described here. The calculated thermal diffuse scattering (TDS) patterns using full lattice dynamics agree well with the experimental observations for parallel- and convergent-beam-illumination cases. The results have shown that the Kikuchi pattern is mainly produced by phonon-scattered electrons and that the Einstein model is not a good thermal-vibration model, at least for molybdenum and silicon. Under strongly diffracting conditions, calculations for energy-filtered diffraction patterns of core ionization edges have shown that the elastic and inelastic scattering can no longer be considered as independent and that the angular distribution of the inelastically scattered electrons cannot be simply described by the Lorentzian function. All these dynamical effects can affect the compositional microanalysis in electron energy-loss spectroscopy (EELS).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767392002897
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  • 20
    Electronic Resource
    Electronic Resource
    Electron virtual inelastic scattering in the multislice scheme (1990)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 46 (1990), S. 366-371 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A multislice theory has been developed for including the virtual inelastic scattering in dynamical calculations of high-energy electron diffraction. The effects on elastic waves of all inelastic processes, such as single-electron excitation, plasmon excitation and phonon scattering, can be characterized by a complex correction potential. Its real part describes the virtual inelastic process and its imaginary part represents the inelastic absorption effect. This potential is directly related to the generalized dielectric response function of the crystal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767389013607
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