Authors
MMJ Treacy, JM Gibson, L Fan, DJ Paterson, I McNulty
Publication date
2005/10/10
Journal
Reports on Progress in Physics
Volume
68
Issue
12
Pages
2899
Publisher
IOP Publishing
Description
Fluctuation microscopy is a hybrid diffraction-imaging technique that detects medium range order in amorphous materials by examining spatial fluctuations in coherent scattering. These fluctuations appear as speckle in images and diffraction patterns. The volume of material contributing to the speckle is determined by the point-spread function (the resolution) of the imaging optics and the sample thickness. The spatial periodicities being probed are related to the diffraction vector. Statistical analysis of the speckle allows the random and non-random (ordered) contributions to be discriminated. The image resolution that gives the maximum speckle contrast, as determined by the normalized variance of the image intensity, is determined by the characteristic length scale of the ordering. Because medium range ordering length scales can extend out to about the tenth coordination shell, fluctuation microscopy tends to be a …
Total citations
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Scholar articles
MMJ Treacy, JM Gibson, L Fan, DJ Paterson, I McNulty - Reports on Progress in Physics, 2005