Download Dynamics of Soft Matter: Neutron Applications by Alexei P. Sokolov, Victoria García Sakai (auth.), Victoria PDF

By Alexei P. Sokolov, Victoria García Sakai (auth.), Victoria García Sakai, Christiane Alba-Simionesco, Sow-Hsin Chen (eds.)

Dynamics of soppy topic: Neutron Applications offers an outline of neutron scattering options that degree temporal and spatial correlations concurrently, on the microscopic and/or mesoscopic scale. those recommendations supply solutions to new questions bobbing up on the interface of physics, chemistry, and biology. wisdom of the dynamics at those degrees is essential to realizing the tender subject box, inclusive of colloids, polymers, membranes, organic macromolecules, foams, emulsions in the direction of organic & biomimetic structures, and phenomena related to wetting, friction, adhesion, or microfluidics.

Emphasizing the complementarities of scattering options with different spectroscopic ones, this quantity additionally highlights the capability achieve in combining strategies similar to rheology, NMR, mild scattering, dielectric spectroscopy, in addition to synchrotron radiation experiments. Key components lined contain polymer technology, organic fabrics, complicated fluids and floor science.

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Extra resources for Dynamics of Soft Matter: Neutron Applications

Example text

3. The partial deuteration of the main chain and the α -methyl group helped to highlight the structural short-range order present in amorphous polymers. A simulation of the extent of the contamination of the EISF is shown in the figure below; its theoretical shape in both the “pure” case (where it is assumed that both components can be separated) and with the coherent component exactly as in Fig. 14 [45]. Two cases are considered: 1. Instantaneous jumps of a proton over three equidistant and equivalent sites on a circle (CH3 group) 2.

Van Hecke P, Janssens G (1978) NMR direct detection of tunnel splittings in solid SiH4. J. Gabrys and T. Kanaya 55. Gabrys B, van Gerven L (1981) Rotational tunneling of methyl groups in pentamethylbenzene studied by NMR relaxation resonance. Chem Phys Lett 82(2):260–263 56. Allen PS, Cowking A (1968) Nuclear magnetic resonance study of hindered rotations in some methylbenzenes. J Chem Phys 49(2):789–797 57. Clough S, Horsewill AJ et al (1981) Neutron scattering study of methyl tunnelling in pentamethylbenzene.

The appearance of TlC minima in the T1 curves was assigned to the onset of α -methyl group rotation with a correlation time τc of the order of 1 ns. In order to explain the observed value of TlC minima in both PMMA stereoisomers, the authors proposed an extension of the 3-τ model [74]. This amounts to introduction of a motion with characteristic time τc , in the picosecond range, which is superimposed on the α -methyl group motion. Such a superposition describes a linking of local backbone and side-chain motions.

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