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  • 1
    Electronic Resource
    Electronic Resource
    Effect of RCA cleaning on the surface chemistry of glass and polysilicon films as studied by ToF-SIMS and XPS (1998)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 26 (1998), S. 270-277 
    Details
    ISSN: 0142-2421
    Keywords: RCA clean ; glass ; surface chemistry ; polysilicon ; thin film transistor ; ToF-SIMS ; XPS ; x-ray photoelectron spectroscopy ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The surface chemistry of an alkaline-earth boroaluminosilicate glass is changed by contact with chemical solutions. The present study shows that RCA cleaning creates a silica-rich surface on the glass. This altered surface can be removed by hydrofluoric acid etching. During the RCA cleaning process, glass components can be transferred to a polysilicon film placed in the same alkaline solution. The acidic solution in turn removes most of the contamination from the polysilicon. © 1998 John Wiley & Sons, Ltd.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of poly(styrene-co-divinylbenzene) microgels (1979)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 17 (1979), S. 1403-1411 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Tightly cross-linked poly(styrene-co-divinylbenzene) microgels with molecular weights in the range 107 to 108 g mole-1 were studied in solution in dimethylformamide containing 7 g dm-3 LiBr. Laser light scattering photon correlation spectroscopy (PCS) was used to measure z-average translational diffusion coefficients D̄z and dilute solution viscometry to measure intrinsic viscosities [η]; values of the equivalent hydrodynamic radii 〈Rη3〉η⅓ and 〈RD-1〉z-1 were derived. Weight-average molecular weights M̄w and z-average mean-square radii of gyration 〈S2〉z were determined by conventional light scattering. The microgels were investigated by gel permeation chromatography, and molecular weight data obtained using the [η]M calibration procedure were in satisfactory agreement with results obtained by electron microsocopy and conventional light scattering.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1979.180170811
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  • 3
    Electronic Resource
    Electronic Resource
    Low-frequency excitations in amorphous poly(vinyl acetate) (1985)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 23 (1985), S. 609-614 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Raman-active modes have been detected in amorphous poly(vinyl acetate) in the frequency region 20-160 cm-1. The low-frequency spectrum appears as a broad band for all three molecular weights examined. Spectra were recorded at two temperatures, 293 and 77 K, and found to show similar characteristics at both temperatures. The presence in solid amorphous polymers of broad structureless bands in general and their significance are discussed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1985.180230401
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  • 4
    Electronic Resource
    Electronic Resource
    Raman scattering from the longitudinal acoustic mode of oligo-oxyethylene (1983)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 21 (1983), S. 919-927 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Low-frequency Raman spectra are reported for monodisperse oligo-oxyethylenes with hydroxy and alkoxy end groups. Assignments are made to the longitudinal acoustic modes. The results are modeled by a rod with a longitudinal modulus E ≥ 2.2 × 1010 N m-2 and perturbing forces as large as (alkoxy-ended oligomers) or larger than (hydroxy-ended oligomers) those suggested for the n-alkanes.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1983.180210608
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  • 5
    Electronic Resource
    Electronic Resource
    Low-frequency raman scattering from methylene-oxyethylene-methylene triblock oligomers (1983)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 21 (1983), S. 1501-1511 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Low-frequency Raman spectra are reported for monodisperse methylene-oxyethylene-methylene triblock oligomers. Assignments are made to the longitudinal acoustical modes (LAMs) of the oxyethylene block and the methylene block. The results for LAM-1 can be modeled by the vibrations of rods with perturbing forces and masses. The results for LAM-3 are not so readily modeled.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1983.180210817
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  • 6
    Electronic Resource
    Electronic Resource
    Low-frequency Raman-active modes and temperature dependences in oligo-oxyethylene (1985)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 23 (1985), S. 471-481 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Raman spectra have been recorded for monodisperse and polydisperse samples of oligooxyethylene at several temperatures in the range 310-77 K. Four scattering peaks are found with frequency dependent on temperature. One at 92-80 cm-1 is unaffected by changes in chain length and is assigned to a lattice mode. The others are chain-length dependent and are assigned either to the longitudinal acoustical modes (LAM-1 and LAM-3)or, less certainly, to a transverse acoustical mode.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1985.180230305
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  • 7
    Electronic Resource
    Electronic Resource
    Collagen fibrillogenesis in vitro: An investigation of the thermal memory effect and of the early events occurring during fibril assembly using dynamic light scattering (1986)
    New York : Wiley-Blackwell
    Biopolymers 25 (1986), S. 1185-1207 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dynamic light scattering has been used to characterize a variety of lathyritic rat skin collagen solutions. The technique was used to monitor the onset of fibril assembly in vitro and to investigate the thermal memory effect. Although the incorporation of thermal memory was demonstrated by reheating the sample and subsequently observing a shortened turbidimetric lag phase, no significant differences between naive solutions and ones exhibiting thermal memory could be detected using photon correlation spectroscopy. This suggests that subtle changes in the state of the collagen molecules rather than extensive changes in the degree of aggregation are responsible for the thermal memory effect. During fibrillogenesis, no large-scale changes in the distribution of monomers or aggregates occur until near the end of the lag phase.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360250703
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  • 8
    Electronic Resource
    Electronic Resource
    Translational and rotational diffusion of tobacco mosaic virus from polarized and depolarized light scattering (1973)
    New York : Wiley-Blackwell
    Biopolymers 12 (1973), S. 1917-1926 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The translational and rotational dynamics of tobacco mosaic virus in sodium phosphate buffer (pH =7.5) solutions has been investigated by polarized and depolarized light scattering Rayleigh linewidth studies. For concentrations ranging from 1.75 × 10-4 g ml-1 to 0.25 × 10-4 g ml-1 the translational diffusion coefficient (DT) has been found to be slightly concentration dependent and extrapolation to zero concentration gives D020°C = 0.34 ± 0.01 × 10-7 cm2S-1. A full analysis of the polarized spectra obtained at high and low scattering angles and the depolarized spectra at near zero scattering angles has enabled these techniques to be compared and the rotational diffusion constant DR to be determined. At a solution concentration of 1.75 × 10-4 g ml-1 a mean value is found to be DR20°C = 350 ± 30s-1. These values of DT and DR are in approximate agreement with calculations based on models of the tobacco mosaic virus molecule as a cylindrical rod.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1973.360120817
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  • 9
    Electronic Resource
    Electronic Resource
    Dialysis studies. V. The behavior of different preparations of bovine ribonuclease (1963)
    New York : Wiley-Blackwell
    Biopolymers 1 (1963), S. 231-238 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Studies of different preparations of ribonuclease A by thin film dialysis and countercurrent distribution have shown the existence of conformational isomers. These forms are slowly interconvertible in a particular solvent environment. They show the minimum molecular weight of ribonuclease and do not differ enzymatically or by rotatory dispersion.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360010304
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  • 10
    Electronic Resource
    Electronic Resource
    Low-frequency dynamics of solid poly(L-alanine) from Raman spectroscopy (1984)
    New York : Wiley-Blackwell
    Biopolymers 23 (1984), S. 2891-2899 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Raman modes from amorphous α-helical poly(L-alanine) in the low-frequency region 〈 150 cm-1 have been observed and assignments and values compared with mode-analysis calculations. The temperature dependence of the complete Raman spectrum of α-poly(L-Ala) is also reported.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360231213
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