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  • Online Resource  (17)
  • AIP Publishing  (17)
  • 2000-2004  (17)
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  • Online Resource  (17)
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  • AIP Publishing  (17)
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  • 2000-2004  (17)
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  • 1
    Online Resource
    Online Resource
    Self-aligned current aperture in native oxidized AlInAs buried heterostructure InGaAsP/InP distributed feedback laser
    AIP Publishing ; 2000
    In:  Applied Physics Letters Vol. 76, No. 12 ( 2000-03-20), p. 1492-1494
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 76, No. 12 ( 2000-03-20), p. 1492-1494
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.126073
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2000
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 2
    Online Resource
    Online Resource
    Thermodynamic stability and kinetic foldability of a lattice protein model
    AIP Publishing ; 2004
    In:  The Journal of Chemical Physics Vol. 120, No. 13 ( 2004-04-01), p. 6274-6287
    Details
    In: The Journal of Chemical Physics, AIP Publishing, Vol. 120, No. 13 ( 2004-04-01), p. 6274-6287
    Abstract: By using serial mutations, i.e., a residue replaced by 19 kinds of naturally occurring residues, the stability of native conformation and folding behavior of mutated sequences are studied. The 3×3×3 lattice protein model with two kinds of interaction potentials between the residues, namely the original Miyazawa and Jernigan (MJ) potentials and the modified MJ potentials (MMJ), is used. Effects of various sites in the mutated sequences on the stability and foldability are characterized through the Z-score and the folding time. It is found that the sites can be divided into three types, namely the hydrophobic-type (H-type), the hydrophilic-type (P-type) and the neutral-type (N-type). These three types of sites relate to the hydrophobic core, the hydrophilic surface and the parts between them. The stability of the native conformation for the serial mutated sequences increases (or decreases) as the increasing in the hydrophobicity of the mutated residues for the H-type sites (or the P-type sites), while varies randomly for the N-type sites. However, the foldability of the mutated sequences is not always consistent with the thermodynamic stability, and their relationship depends on the site types. Since the hydrophobic tendency of the MJ potentials is strong, the ratio between the number of the H-type sites and the number of the P-type sites is found to be 1:2. Differently, for the MJJ potentials it is found that such a ratio is about 1:1 which is relevant to that of real proteins. This suggests that the modification of the MJ potentials is rational in the aspect of thermodynamic stability. The folding of model proteins with the MMJ potentials is fast. However, the relationship between the foldability and the thermodynamic stability of the mutated sequences is complex.
    Type of Medium: Online Resource
    ISSN: 0021-9606 , 1089-7690
    URL: Article
    DOI: 10.1063/1.1651053
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2004
    detail.hit.zdb_id: 3113-6
    detail.hit.zdb_id: 1473050-9
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  • 3
    Online Resource
    Online Resource
    Study of superalloy topography during ultrahigh intensity nanosecond ultraviolet laser ablation
    AIP Publishing ; 2002
    In:  Journal of Applied Physics Vol. 91, No. 10 ( 2002-05-15), p. 6761-6764
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 91, No. 10 ( 2002-05-15), p. 6761-6764
    Abstract: We report on the topography of holes ablated by an ultrahigh intensity 355 and 266 nm laser with 8 ns pulse width in Ni-base superalloy Inconel 718. The origin of droplets, micropores, and microcracks on the surface of hole is identified. Qualitative differences in the characteristics of microcracks indicate that the dominant continuous microcracks result from thermal effects in 355 nm laser ablation, and the dominant island-chain microcrack result from photochemical effects in 266 nm laser ablation. In ultrahigh intensity laser ablation ( & gt;200 GW/cm2), the mechanical load on the surface is very significant to the resulting topography, and the grain boundary plays an important role in the origin of the micropores.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.1472239
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2002
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 4
    Online Resource
    Online Resource
    Laser-induced wavy pattern formation in metal thin films
    AIP Publishing ; 2004
    In:  Applied Physics Letters Vol. 85, No. 11 ( 2004-09-13), p. 1934-1936
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 85, No. 11 ( 2004-09-13), p. 1934-1936
    Abstract: Laser-induced well-ordered and controllable wavy patterns are constructed in the deposited metal thin film. The micrometer-sized structure and orientation of the wavy patterns can be controlled via scanning a different size of rectangle laser spot on the films. Ordered patterns such as aligned, crossed, and whirled wave structures were designed over large areas. This patterning technique may find applications in both exploring the reliability and mechanical properties of thin films, and fabricating microfluidic devices.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.1787891
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2004
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 5
    Online Resource
    Online Resource
    Effect of atomic disorder or chain length on the stability of photoinduced polarization inversion
    AIP Publishing ; 2002
    In:  The Journal of Chemical Physics Vol. 116, No. 15 ( 2002-04-15), p. 6760-6763
    Details
    In: The Journal of Chemical Physics, AIP Publishing, Vol. 116, No. 15 ( 2002-04-15), p. 6760-6763
    Abstract: The effect of atomic disorder or chain length on the stability of photoinduced polarization inversion has been studied. The atomic disorder was simulated by square-random or Gaussian-random model. It was found that for the square-random distribution case, photoinduced polarization inversion remains steadily when atomic disorder is less than 18a (a is the lattice constant of polyacetylene), the reversion polarization disappears and gets into normal polarized state when the disorder is stronger than over 18a. The reason of a normal polarization resulted from the strong lattice disorder was discussed. The relationship between the reverse polarization of biexciton state and the confinement constant te as well as the variation of chain length was also studied.
    Type of Medium: Online Resource
    ISSN: 0021-9606 , 1089-7690
    URL: Article
    DOI: 10.1063/1.1461364
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2002
    detail.hit.zdb_id: 3113-6
    detail.hit.zdb_id: 1473050-9
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  • 6
    Online Resource
    Online Resource
    Conductivity of solvated electrons in hexane investigated with terahertz time-domain spectroscopy
    AIP Publishing ; 2004
    In:  The Journal of Chemical Physics Vol. 121, No. 1 ( 2004-07-01), p. 394-404
    Details
    In: The Journal of Chemical Physics, AIP Publishing, Vol. 121, No. 1 ( 2004-07-01), p. 394-404
    Abstract: We present investigations of the transient photoconductivity and recombination dynamics of quasifree electrons in liquid n-hexane and cyclohexane performed using terahertz time-domain spectroscopy (THz-TDS). Quasifree electrons are generated by two-photon photoionization of the liquid using a femtosecond ultraviolet pulse, and the resulting changes in the complex conductivity are probed by a THz electromagnetic pulse at a variable delay. The detection of time-domain wave forms of the THz electric field permits the direct determination of both the real and the imaginary part of the conductivity of the electrons over a wide frequency range. The change in conductivity can be described by the Drude model, thus yielding the quasifree electron density and scattering time. The electron density is found to decay on a time scale of a few hundred picoseconds, which becomes shorter with increasing excitation density. The dynamics can be described by a model that assumes nongeminate recombination between electrons and positive ions. In addition, a strong dependence of the quasifree electron density on temperature is observed, in agreement with a two-state model in which the electron may exist in either a quasifree or a bound state.
    Type of Medium: Online Resource
    ISSN: 0021-9606 , 1089-7690
    URL: Article
    DOI: 10.1063/1.1757442
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2004
    detail.hit.zdb_id: 3113-6
    detail.hit.zdb_id: 1473050-9
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  • 7
    Online Resource
    Online Resource
    Plasma deposition of Ultrathin polymer films on carbon nanotubes
    AIP Publishing ; 2002
    In:  Applied Physics Letters Vol. 81, No. 27 ( 2002-12-30), p. 5216-5218
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 81, No. 27 ( 2002-12-30), p. 5216-5218
    Abstract: Ultrathin films of pyrrole were deposited on the surfaces of carbon nanotubes using a plasma polymerization treatment. High-resolution electron transmission microscopy images revealed that an extremely thin film of the polymer layer (2∼7 nm) was uniformly deposited on the outer and inner surfaces of the nanotubes. The nanotubes of all sizes exhibited equally uniform ultrathin films, indicating well-dispersed nanotubes in the fluidized bed reactor during the plasma treatment. In particular, the inner wall of the nanotube was also coated with a uniform ultrathin film of only ∼1–3 nm. Time-of-flight secondary ion mass spectroscopy experiments confirmed the highly branched and cross-linked polymer thin films on the carbon nanotubes. The plasma deposition mechanism is discussed in this letter.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.1527702
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2002
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 8
    Online Resource
    Online Resource
    Low-lying electronic states of difluorodioxirane
    AIP Publishing ; 2003
    In:  The Journal of Chemical Physics Vol. 118, No. 22 ( 2003-06-08), p. 10065-10072
    Details
    In: The Journal of Chemical Physics, AIP Publishing, Vol. 118, No. 22 ( 2003-06-08), p. 10065-10072
    Abstract: The electronic structures of the A11 ground state and several low-lying excited states of difluorodioxirane (CF2O2) were investigated using the recently revised, multireference, second-order Generalized Van Vleck Perturbation Theory (GVVPT2) method for the description of electron correlation. Multiconfigurational self-consistent field calculations that included 19 molecular orbitals demonstrated that the electronic structures of all considered states are substantially multiconfigurational, with maximum configuration amplitudes not larger than 0.9. Equilibrium geometries of ground and first excited A11 states and the energetically lowest lying B1 and B2 triplet and singlet states were optimized at the GVVPT2 level. Additionally, the nature of and vertical excitation energy to the 1 1A2 state are evaluated. Most of the considered states are predicted to be thermodynamically stable relative to their adiabatic dissociation limits and, at least some of them, should be observable in absorption spectra. The O–O bond lengths in the excited states are predicted to be significantly larger (1.94–2.34 Å) than in the ground state (1.578 Å), which contains the longest known bond of this type.
    Type of Medium: Online Resource
    ISSN: 0021-9606 , 1089-7690
    URL: Article
    DOI: 10.1063/1.1571518
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2003
    detail.hit.zdb_id: 3113-6
    detail.hit.zdb_id: 1473050-9
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  • 9
    Online Resource
    Online Resource
    Growth and pyroelectric property of 0.2 mol % Fe-doped Pb(Mg1/3Nb2/3)O3-0.38PbTiO3 single crystals measured by a dynamic technique
    AIP Publishing ; 2004
    In:  Applied Physics Letters Vol. 84, No. 23 ( 2004-06-07), p. 4711-4713
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 84, No. 23 ( 2004-06-07), p. 4711-4713
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.1762982
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2004
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 10
    Online Resource
    Online Resource
    Self-organized (553)BIn0.15Ga0.85As/GaAs quantum-wire field-effect transistors
    AIP Publishing ; 2001
    In:  Applied Physics Letters Vol. 78, No. 18 ( 2001-04-30), p. 2793-2795
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 78, No. 18 ( 2001-04-30), p. 2793-2795
    Abstract: Extremely uniform and high-density In0.15Ga0.85As/GaAs quantum wires (QWRs) were naturally formed on a (553)B-oriented GaAs substrate by molecular-beam epitaxy. The density of the QWRs is as high as 4.0×105 cm−1. The strong photoluminescence peak at λ=868 nm from the (553)B QWRs shows a large polarization anisotropy [p=(I∥−I⊥)/(I∥+I⊥)=0.22] and a very small full width at half maximum of 9.2 meV at 12 K. Based on the modulation-doped (553)B QWR structure, self-organized QWR field-effect transistors were fabricated (the channel along the QWRs’ direction). The devices demonstrate very good saturation characteristics and pinch-off behavior at room temperature. A maximum transconductance (gm) of 135 mS/mm is measured for 2 μm gate-length devices.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.1365949
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2001
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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