A new framework for X-ray photon correlation spectroscopy analysis from polycrystalline materials

Ronald M. Lewis, Grayson L. Jackson, Michael J. Maher, Kyungtae Kim, Timothy P Lodge, Mahesh Mahanthappa, Suresh Narayanan, Frank S Bates

Research output: Contribution to journalReview article

Abstract

We report a new analytical framework for interpreting data from X-ray photon correlation spectroscopy measurements on polycrystalline materials characterized by strong scattering intensity variations at fixed wavevector magnitude (i.e., anisotropic scattering). Currently, no analytical method exists for the interpretation of the time-dependent anisotropic scattering from such materials. The framework is applied to interrogate the dynamics of a spherical micelle-forming diblock copolymer melt below the order-disorder transition, wherein finite size grains of a micellar body-centered cubic structure produce anisotropic scattering. A wealth of analytical information is recovered from a simple measurement, including distributions of relaxation times and speeds associated with micelles within grains. The findings of this study demonstrate the efficacy of this new analytical method, which may be readily adapted for application to a variety of materials and systems.

Original languageEnglish (US)
Article number123902
JournalReview of Scientific Instruments
Volume89
Issue number12
DOIs
StatePublished - Dec 1 2018

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Photon correlation spectroscopy
Polycrystalline materials
X ray spectroscopy
Scattering
photons
scattering
Micelles
spectroscopy
micelles
x rays
Order disorder transitions
Relaxation time
Block copolymers
copolymers
grain size
relaxation time
disorders

PubMed: MeSH publication types

  • Journal Article

Cite this

A new framework for X-ray photon correlation spectroscopy analysis from polycrystalline materials. / Lewis, Ronald M.; Jackson, Grayson L.; Maher, Michael J.; Kim, Kyungtae; Lodge, Timothy P; Mahanthappa, Mahesh; Narayanan, Suresh; Bates, Frank S.

In: Review of Scientific Instruments, Vol. 89, No. 12, 123902, 01.12.2018.

Research output: Contribution to journalReview article

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AU - Jackson, Grayson L.

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AU - Kim, Kyungtae

AU - Lodge, Timothy P

AU - Mahanthappa, Mahesh

AU - Narayanan, Suresh

AU - Bates, Frank S

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