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  • 1
    Electronic Resource
    Electronic Resource
    3-D Self-Assembled ZnSnO〈sub〉3〈/sub〉 Nanoparticles: One-Step Solid-State Synthesis (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Journal of metastable and nanocrystalline materials Vol. 23 (Jan. 2005), p. 105-108 
    Details
    ISSN: 1422-6375
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: By means of solid-state reactions method, ZnSnO3 nanoparticles were prepared in the reactions of ZnCl2 and SnCl4·5H2O with KOH in the presence of added KCl crystal, and were assembled into 3-D aggregates with tetragonal-like shape in the size range of 20-200 nm. The products were characterized by powder X-ray diffraction (XRD), and the microstructures of the samples were investigated by transmission electron microscope (TEM), selected area electron diffraction (SAED) and high-resolution transmission electron microscope (HRTEM) in detail. Probable mechanisms for the formation of such tetragonal-like shape of ZnSnO3 3-D aggregates are proposed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/43/transtech_doi~10.4028%252Fwww.scientific.net%252FJMNM.23.105.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis of a Novel Nanostructure of Rutile Titania by Sonochemical Method (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Journal of metastable and nanocrystalline materials Vol. 23 (Jan. 2005), p. 235-238 
    Details
    ISSN: 1422-6375
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Chestnut-bur-like rutile titania assemblies are successfully synthesized by a sonochemical method. Scanning electron microscopy and transmission electron microscopy analyses reveal that the assemblies are formed by radial coagulation of rutile acicular nanocrystals. Effects of experimental conditions on the phase and structure of the products are also presented
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/43/transtech_doi~10.4028%252Fwww.scientific.net%252FJMNM.23.235.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Microstructural Characterization of BaTiO〈sub〉3〈/sub〉 Ceramic Nanoparticles Synthesized by the Hydrothermal Technique (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 106 (Sept. 2005), p. 41-46 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: BaTiO3 (BT) nanoparticles were prepared by the hydrothermal technique using different starting materials and the microstructure examined by XRD, SEM, TEM and HRTEM. X-ray diffraction and electron diffraction patterns showed that the nanoparticles were the cubic BaTiO3 phase. The BT nanoparticles prepared from the starting materials of as-prepared titanium hydroxide and barium hydroxide have spherical grain morphology, an average size of 65 nm and a fairly narrow size distribution. A uniform diffraction contrast across each single grain is observed in the TEM images, and the clear lattice fringes (with d110 = 0.28 nm) observed in HRTEM images reveal that well-crystallized BT nanoparticles are synthesized by the hydrothermal method. The edges of the particles are very smooth, with no surface steps. BT nanoparticles with average grain size of 90 nm, synthesized using barium hydroxide and titanium dioxide as the starting materials, show surface facets. In this case a bimodal size distribution of large faceted and smaller particles is observed. Diffraction contrast variation across the particles caused by high strains within the particles is clearly observed. The high strains obviously stem from structural defects formed during hydrothermal synthesis, presumable in the form of lattice OH− ions and their compensation by cation vacancies. HRTEM images demonstrate that surface facets parallel to the (100) and (110) planes and small islands with 3 ~ 4 atomic layer thickness are frequently observed around the edge of the particles
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/21/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.106.41.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrasonic excitation and propagation in an acoustic superlattice (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 904-914 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The ultrasonic excitation and propagation in an acoustic superlattice made of a LiNbO3 crystal is studied. Some interesting phenomena are predicted theoretically. The resonance is determined by the periodicity of the acoustic superlattice (ASL). The acoustic power emitted by the ASL into the transmission medium is directly proportional to N2 (N is the number of domains of the ASL). In view of these two features, the ASL may have potential applications in acoustic devices operating at frequencies of several hundred megahertz to several gigahertz. Another interesting phenomenon is the existence of a satellitelike resonance, whose frequency is related to the total thickness of the ASL. Using the ASL, resonators and transducers have been fabricated with operating frequencies in the range of 500–1000 MHz. Satellitelike resonances have been observed. Transducers with a very low insertion loss at 555 MHz and a 5.8% 3 dB bandwidth have been fabricated. The experiments basically confirm the theoretical predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351766
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  • 5
    Electronic Resource
    Electronic Resource
    Green and violet light generation in LiNbO3 optical superlattice through quasiphase matching (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 3092-3094 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Picosecond 531 nm green and 385 nm violet light generation through first-order and third-order quasiphase matching (QPM) has been performed in a LiNbO3 optical superlattice. The conversion efficiency is 11.4% and 1.6%, respectively. A comparison between theoretical analyses and experimental results of frequency doubling peak value and full width at half-maximum for both the first- and third-order QPM are given. Possible simultaneous generation of green and violet light in the crystal are predicted for constructing a compact two outputting wavelengths light source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111357
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  • 6
    Electronic Resource
    Electronic Resource
    LiTaO3 crystal periodically poled by applying an external pulsed field (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 5481-5483 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A method of periodically poling LiTaO3 single crystal at room temperature by applying an external pulsed field is proposed. The relationship between the growth of inverted domains and switching current as well as switching time has been studied. The growth of inverted domains can be controlled by the duration of the pulsed field. The domain structure with period Λ(approximately-greater-than)8 μm has been fabricated in a 0.3-mm-thick plate of LiTaO3 by partial switching. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359250
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  • 7
    Electronic Resource
    Electronic Resource
    Study of a〈001〉 and a〈110〉 screw dislocations viewed end-on in crystal Ba(NO3)2 by birefringence topography (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 111-116 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The screw dislocations with Burgers vector a〈001〉 and a〈110〉 in Ba(NO3)2 crystals have been studied by birefringence topography. In combination with the results obtained previously [C.-Z. Ge, N.-B. Ming, K. Tsukamoto, K. Maiwa, and I. Sunagawa, J. Appl. Phys. 69, 7556 (1991); C.-Z. Ge, H.-W. Wang, and N.-B. Ming, ibid. 74, 139 (1993)], it has been shown that not only a〈111〉, but also a〈110〉 screw dislocations viewed end-on are visible; however, a〈100〉 screw dislocation viewed end-on are always invisible in barium nitrate crystals. The intensity distributions and extinction rules of birefringence images of a〈110〉 screw dislocation viewed end-on are determined both experimentally and theoretically. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360659
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  • 8
    Electronic Resource
    Electronic Resource
    Study on the formation mechanism of a complex domain structure in LiNbO3 (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 4136-4138 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A complex domain structure in LiNbO3 is fabricated by proton exchange followed by heat treatment. Domain inversion at the +c and −c faces as well as reinversion in the inverted region near the +c surface are observed experimentally. The proton and lithium concentrations are measured by secondary ion mass spectroscopy. It is found that the proton profile peaks away from the surface due to indiffusion and outdiffusion. The domain inversion mechanism is discussed. An internal electric field model is proposed which is based on the concentration gradient of proton and lithium deficiency. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359502
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  • 9
    Electronic Resource
    Electronic Resource
    Further studies on ultrasonic excitation in an acoustic superlattice (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 2221-2224 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This article analyzes theoretically the "in-line field'' scheme and the "crossed-field'' scheme for acoustic excitation of an acoustic superlattice for both resonators and transducers. The electrical impedance and the admittance are deduced and the electromechanical coupling coefficients are calculated. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361186
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  • 10
    Electronic Resource
    Electronic Resource
    Birefringence images of screw dislocations viewed end on in cubic crystals containing a long-range stress field (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 139-145 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The expression for the intensity distribution and computer-simulated images of screw dislocations with Burgers vector α〈111〉 or α/2〈111〉 viewed end on in cubic crystals subjected to a long-range uniaxial stress has been obtained by considering the anisotropy of both elastic and photoelastic properties of the material. The computer-simulated images of end-on screw dislocations show twofold symmetry with a pair of dark and bright petals which result from the effect of a long-range stress superimposed on that of the screw dislocations. The computer-simulated images are in good agreement with the experimental images observed in Ba(NO3)2 and Gd3Ga5O12 crystals. The principal stress of the long-range uniaxial stress field around the screw dislocation in the crystal wafer has been estimated, based on this theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354146
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