Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1985-1989  (19)
  • 1988  (19)
Source
Material
Years
  • 1985-1989  (19)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Holographic grating studies of the diffusion process of camphorquinone in polycarbonate above and below Tg (1988)
    s.l. : American Chemical Society
    Macromolecules 21 (1988), S. 3519-3523 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00190a031
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Effect of plasticization on mass diffusion of camphorquinone in polystyrene (1988)
    s.l. : American Chemical Society
    Macromolecules 21 (1988), S. 1811-1813 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00184a046
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Investigation of relaxation processes in low and high molecular weight bulk poly(methyl methacrylate) by dynamic light scattering (1988)
    s.l. : American Chemical Society
    Macromolecules 21 (1988), S. 2253-2257 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00185a064
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The holographic investigation of diffusion of methyl red in poly(caprolactone) diol (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 5211-5214 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The translational diffusion process of methyl red dissolved in poly(caprolactone) diol has been investigated as a function of temperature, using the laser induced holographic grating relaxation technique. The tracer diffusion coefficients of methyl red in trans and cis forms are found to follow the WLF type of temperature dependence with the WLF coefficients identical to that associated with the shear modulus of the polymer host. The cis isomer of methyl red although about 8% smaller in size diffuses about three times slower than the trans isomer. This is interpreted as due to a stronger interaction between the cis isomer and the polymer host.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454756
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    A dynamic light scattering study of 1,3,5-tri-α-naphthyl benzene: A supercooled liquid (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 1497-1500 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A dynamic light scattering study of 1,3,5-tri-α-naphthyl benzene in the supercooled state using Fabry–Perot interferometry is carried out. The frequency, linewidth, and Landau–Placzek ratio of the spectrum associated with the longitudinal hypersonic wave, the frequency of the transverse hypersonic wave, and the orientational relaxation time are determined as functions of temperature. The linewidth maximum of the longitudinal hypersonic wave is observed at 420 K, at which the transverse frequency becomes vanishingly small; the longitudinal frequency also changes the temperature dependence behavior at this temperature. Combination of the interferometric data with the data obtained using photon correlation shows that over 13 orders of magnitude, the temperature dependence of the orientational relaxation time follows the Debye–Stokes–Einstein equation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454127
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Rotationally resolved hot atom collisional excitation of CO2 0001 and 0002 stretching vibrations by time-resolved diode laser spectroscopy (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 6240-6254 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A tunable infrared diode laser has been used to monitor the time-resolved absorption of rovibrationally excited CO2 molecules produced in collisions with fast hydrogen atoms from the 193 nm excimer laser photolysis of H2S. Nascent relative rotational population distributions were measured for the 0001 and 0002 vibrational states in CO2 following collisional excitation. The nascent distributions for both of these states were found to be significantly displaced from the 300 K Boltzmann distribution with peaks at J=31 and J=34 for 0001 and 0002, respectively. An approximate diffusion treatment for the mass transport of fast moving hydrogen atoms out of the region of the diode laser probe beam was developed and used to obtain approximate absolute scattering cross sections. Sufficient energy is available in the H/CO2 collision process to excite 0001 rotational states with J greater than 140. The fall-off in excitation probability for J〉31 is ascribed to the small impact parameter necessary to produce vibrationally excited CO2 (0001). This in turn limits the total angular momentum available in those collisions which actually produce 0001. These results are compared with previous experiments measuring the total probability for collisional excitation of all ν3 quanta as well as with various models for inelastic collisional scattering.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454463
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Fluid flow due to a stretching cylinder (1988)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 31 (1988), S. 466-468 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The fluid flow outside of a stretching cylinder is studied. The problem is governed by a third-order nonlinear ordinary differential equation that leads to exact similarity solutions of the Navier–Stokes equations. Because of algebraic decay, an exponential transform is used to facilitate numerical integration. Asymptotic solutions for large Reynolds numbers compare well with numerical results. The heat transfer is determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866827
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Low threshold 1.3-μm InGaAsP/InP lasers prepared by a single-step liquid-phase epitaxy (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2151-2153 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A novel approach to form low threshold laser structures, similar to existing mass-transported lasers but without the second regrowth step, is described. The laser has comparable performance in threshold current and quantum efficiency to more conventional buried heterostructure lasers made with a two-step process. Because of the simplicity in fabrication and its reduced parasitic capacitance it has the potential to be low cost and to have high modulation bandwidth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341177
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Compositional disordering of GaAs/AlGaAs multiple quantum wells using ion bombardment at elevated temperatures (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 1632-1634 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new method has been developed for compositional mixing of heterostructures by ion bombardment at elevated temperatures. Complete mixing of a 1-μm-thick GaAs/AlGaAs 40-period multiple quantum well layer has been achieved by bombardment with 380 keV Ne+ ions for 1 h with the sample at 700 °C. This temperature is much lower than the annealing temperatures used in other vacancy-enhanced disordering techniques, and even lower temperatures and shorter durations should be possible. Compositional disordering is verified by sputter-profile Auger electron spectroscopy and transmission electron microscopy. Complete mixing is also demonstrated by optical transmission spectra of the disordered material, which exhibit the same band edge as a uniform alloy with the average aluminum mole fraction of the multiple quantum well layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99934
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Hybrid approach to two-dimensional surface-emitting diode laser arrays (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 938-940 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new hybrid structure for two-dimensional surface-emitting diode laser arrays has been demonstrated. Each hybrid array consists of linear arrays of GaAs/AlGaAs lasers, with conventional cleaved end facets, that are mounted in grooves etched in a Si substrate. The etched grooves have flat bottoms and 45° sidewalls that are coated with a highly reflecting Cr/Au layer. A hybrid array with three 4-mm-wide GaAs/AlGaAs linear laser arrays has been fabricated and tested. Approximately 10 W of peak power perpendicular to the array surface was obtained from each of the linear arrays for 11–12 A of pulsed current per array. The measured differential quantum efficiencies were 65–70%, indicating that the 45° metallized sidewalls deflect by 90° essentially all of the light emitted from the laser facets. The new approach allows for the use of integral Si heat sinks and should prove useful for fabricating large, high-power, two-dimensional laser arrays in any material system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100407
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...