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- W3126365791 abstract "Abstract Quasielastic neutron scattering (QENS) allows measurement of the molecular displacements in time and space, from pico- to tens of nanoseconds and from Ångstroms to nanometers, respectively. The method probes dynamics from fast vibrational modes down to slow diffusive motion. Every scattering experiment leads to a dynamic structure factor $$Sleft( {vec Q,omega } right)$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mrow> <mml:mi>S</mml:mi> <mml:mfenced> <mml:mrow> <mml:mover> <mml:mi>Q</mml:mi> <mml:mo>→</mml:mo> </mml:mover> <mml:mo>,</mml:mo> <mml:mi>ω</mml:mi> </mml:mrow> </mml:mfenced> </mml:mrow> </mml:math> or its spatial and temporal Fourier transform (van Hove correlation function $$Gleft( {vec r,t} right)$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mrow> <mml:mi>G</mml:mi> <mml:mfenced> <mml:mrow> <mml:mover> <mml:mi>r</mml:mi> <mml:mo>→</mml:mo> </mml:mover> <mml:mo>,</mml:mo> <mml:mi>t</mml:mi> </mml:mrow> </mml:mfenced> </mml:mrow> </mml:math> ). This shows exactly where the atoms are and how they move. In this manuscript the basics of the QENS method are presented and a few examples highlighting the potentials of QENS are given: (i) diffusion of liquids and gases in nano- and mesoporous materials; (ii) hydrogen dynamics in a high temperature polymer electrolyte fuel cell (HT-PEFC) and (iii) influence of the surface interactions on polymer dynamics in nanopores." @default.
- W3126365791 created "2021-02-15" @default.
- W3126365791 creator A5062501291 @default.
- W3126365791 date "2021-02-02" @default.
- W3126365791 modified "2023-10-18" @default.
- W3126365791 title "Dynamics studied by Quasielastic Neutron Scattering (QENS)" @default.
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- W3126365791 doi "https://doi.org/10.1007/s10450-020-00295-4" @default.
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