Quasielastic nuclear forward scattering as a background-free probe of slow glass dynamics in confined geometries

T. Asthalter; I. Sergueev; H. Franz; R. Rüffer; W. Petry; K. Messel; P. Härter; A. Huwe

doi:10.1007/s100510170107

Quasielastic nuclear forward scattering as a background-free probe of slow glass dynamics in confined geometries

T. Asthalter, I. Sergueev, H. Franz, R. Rüffer, W. Petry, K. Messel, P. Härter, A. Huwe

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11 Scopus citations

Abstract

The microscopic dynamics of dibutylphthalate/ferrocene in nanoporous silica matrices with pore sizes of 25, 50, 75, and 200 Å, respectively, has been investigated in a temperature range between 70 and 200 K by nuclear resonant scattering of synchrotron radiation. The decay of the coherently forward scattered signal is enhanced owing to the diffusive motion of resonant nuclei on the timescale of the nuclear resonance lifetime. This enhancement contains information about the self-correlation function for a fixed wave vector k = 7.3 Å^-1. In the viscous regime and for 25 Å pores the diffusional dynamics is clearly slowed down when compared to the bulk material.

Original language	English
Pages (from-to)	301-306
Number of pages	6
Journal	European Physical Journal B
Volume	22
Issue number	3
DOIs	https://doi.org/10.1007/s100510170107
State	Published - 1 Aug 2001

Keywords

61.43.Fs Glasses
68.65.-k Low-dimensional, mesoscopic, and nanoscale systems: structure and nonelectronic properties
76.80.+y Mössbauer effect; other gamma-ray spectroscopy

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10.1007/s100510170107

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title = "Quasielastic nuclear forward scattering as a background-free probe of slow glass dynamics in confined geometries",

abstract = "The microscopic dynamics of dibutylphthalate/ferrocene in nanoporous silica matrices with pore sizes of 25, 50, 75, and 200 {\AA}, respectively, has been investigated in a temperature range between 70 and 200 K by nuclear resonant scattering of synchrotron radiation. The decay of the coherently forward scattered signal is enhanced owing to the diffusive motion of resonant nuclei on the timescale of the nuclear resonance lifetime. This enhancement contains information about the self-correlation function for a fixed wave vector k = 7.3 {\AA}-1. In the viscous regime and for 25 {\AA} pores the diffusional dynamics is clearly slowed down when compared to the bulk material.",

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T1 - Quasielastic nuclear forward scattering as a background-free probe of slow glass dynamics in confined geometries

AU - Asthalter, T.

AU - Sergueev, I.

AU - Franz, H.

AU - Rüffer, R.

AU - Petry, W.

AU - Messel, K.

AU - Härter, P.

AU - Huwe, A.

PY - 2001/8/1

Y1 - 2001/8/1

N2 - The microscopic dynamics of dibutylphthalate/ferrocene in nanoporous silica matrices with pore sizes of 25, 50, 75, and 200 Å, respectively, has been investigated in a temperature range between 70 and 200 K by nuclear resonant scattering of synchrotron radiation. The decay of the coherently forward scattered signal is enhanced owing to the diffusive motion of resonant nuclei on the timescale of the nuclear resonance lifetime. This enhancement contains information about the self-correlation function for a fixed wave vector k = 7.3 Å-1. In the viscous regime and for 25 Å pores the diffusional dynamics is clearly slowed down when compared to the bulk material.

AB - The microscopic dynamics of dibutylphthalate/ferrocene in nanoporous silica matrices with pore sizes of 25, 50, 75, and 200 Å, respectively, has been investigated in a temperature range between 70 and 200 K by nuclear resonant scattering of synchrotron radiation. The decay of the coherently forward scattered signal is enhanced owing to the diffusive motion of resonant nuclei on the timescale of the nuclear resonance lifetime. This enhancement contains information about the self-correlation function for a fixed wave vector k = 7.3 Å-1. In the viscous regime and for 25 Å pores the diffusional dynamics is clearly slowed down when compared to the bulk material.

KW - 61.43.Fs Glasses

KW - 68.65.-k Low-dimensional, mesoscopic, and nanoscale systems: structure and nonelectronic properties

KW - 76.80.+y Mössbauer effect; other gamma-ray spectroscopy

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JF - European Physical Journal B

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ER -

Quasielastic nuclear forward scattering as a background-free probe of slow glass dynamics in confined geometries

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Keywords

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