Probing local order in glasses from limited-volume electron and x-ray diffraction

Amelia Liu, Rico Tabor, L Bourgeois, M D de Jonge, S. T. Mudie, T C Petersen

Research output: Contribution to journalArticleResearchpeer-review

Abstract

It has long been recognised that spatial fluctuations in local order in disordered assemblies of particles can be probed using limited-volume diffraction measurements. These measurements have unique advantages over broad-beam diffraction experiments that isotropically average over many structural configurations and result in one-dimensional intensity curves, requiring modelling to interpret. Despite the advantages of limiting illumination to a low number of particle configurations, obtaining quantitative measurements of local order from such experiments remains a challenge. The effects on the diffraction pattern of changing the beam energy, lateral size, aberrations and coherence and the specimen thickness have only recently been clarified. We review theoretical and experimental efforts in this direction in the fields of both electron and x-ray diffraction and identify promising areas of future development.

Original languageEnglish
Article number054046
JournalJournal of Statistical Mechanics: Theory and Experiment
Volume2016
Issue number5
DOIs
Publication statusPublished - 2016

Keywords

  • Disordered systems (experiments)
  • Structural colloidal and polymer glasses (experiments)
  • Structural glasses (experiments)

Cite this

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title = "Probing local order in glasses from limited-volume electron and x-ray diffraction",
abstract = "It has long been recognised that spatial fluctuations in local order in disordered assemblies of particles can be probed using limited-volume diffraction measurements. These measurements have unique advantages over broad-beam diffraction experiments that isotropically average over many structural configurations and result in one-dimensional intensity curves, requiring modelling to interpret. Despite the advantages of limiting illumination to a low number of particle configurations, obtaining quantitative measurements of local order from such experiments remains a challenge. The effects on the diffraction pattern of changing the beam energy, lateral size, aberrations and coherence and the specimen thickness have only recently been clarified. We review theoretical and experimental efforts in this direction in the fields of both electron and x-ray diffraction and identify promising areas of future development.",
keywords = "Disordered systems (experiments), Structural colloidal and polymer glasses (experiments), Structural glasses (experiments)",
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Probing local order in glasses from limited-volume electron and x-ray diffraction. / Liu, Amelia; Tabor, Rico; Bourgeois, L; de Jonge, M D; Mudie, S. T.; Petersen, T C.

In: Journal of Statistical Mechanics: Theory and Experiment, Vol. 2016, No. 5, 054046, 2016.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Probing local order in glasses from limited-volume electron and x-ray diffraction

AU - Liu, Amelia

AU - Tabor, Rico

AU - Bourgeois, L

AU - de Jonge, M D

AU - Mudie, S. T.

AU - Petersen, T C

PY - 2016

Y1 - 2016

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AB - It has long been recognised that spatial fluctuations in local order in disordered assemblies of particles can be probed using limited-volume diffraction measurements. These measurements have unique advantages over broad-beam diffraction experiments that isotropically average over many structural configurations and result in one-dimensional intensity curves, requiring modelling to interpret. Despite the advantages of limiting illumination to a low number of particle configurations, obtaining quantitative measurements of local order from such experiments remains a challenge. The effects on the diffraction pattern of changing the beam energy, lateral size, aberrations and coherence and the specimen thickness have only recently been clarified. We review theoretical and experimental efforts in this direction in the fields of both electron and x-ray diffraction and identify promising areas of future development.

KW - Disordered systems (experiments)

KW - Structural colloidal and polymer glasses (experiments)

KW - Structural glasses (experiments)

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