ORIENTATIONAL ORDER IN DISORDERED SYSTEMS

1985 ◽  
Vol 46 (C9) ◽  
pp. C9-79-C9-89 ◽  
Author(s):  
J. F. Sadoc
IUCrJ ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 635-648 ◽  
Author(s):  
Ruslan P. Kurta ◽  
Lutz Wiegart ◽  
Andrei Fluerasu ◽  
Anders Madsen

Higher-order statistical analysis of X-ray scattering from dilute solutions of polydisperse goethite nanorods was performed and revealed structural information which is inaccessible by conventional small-angle scattering. For instance, a pronounced temperature dependence of the correlated scattering from suspension was observed. The higher-order scattering terms deviate from those expected for a perfectly isotropic distribution of particle orientations, demonstrating that the method can reveal faint orientational order in apparently disordered systems. The observation of correlated scattering from polydisperse particle solutions is also encouraging for future free-electron laser experiments aimed at extracting high-resolution structural information from systems with low particle heterogeneity.


2017 ◽  
Vol 114 (39) ◽  
pp. 10344-10349 ◽  
Author(s):  
Amelia C. Y. Liu ◽  
Rico F. Tabor ◽  
Martin D. de Jonge ◽  
Stephen T. Mudie ◽  
Timothy C. Petersen

Local structure and symmetry are keys to understanding how a material is formed and the properties it subsequently exhibits. This applies to both crystals and amorphous and glassy materials. In the case of amorphous materials, strong links between processing and history, structure and properties have yet to be made because measuring amorphous structure remains a significant challenge. Here, we demonstrate a method to quantify proportions of the bond-orientational order of nearest neighbor clusters [Steinhardt, et al. (1983) Phys Rev B 28:784–805] in colloidal packings by statistically analyzing the angular correlations in an ensemble of scanning transmission microbeam small-angle X-ray scattering (μSAXS) patterns. We show that local order can be modulated by tuning the potential between monodisperse, spherical colloidal silica particles using salt and surfactant additives and that more pronounced order is obtained by centrifugation than sedimentation. The order in the centrifuged glasses reflects the ground state order in the dispersion at lower packing fractions. This diffraction-based method can be applied to amorphous systems across decades in length scale to connect structure to behavior in disordered systems with a range of particle interactions.


1993 ◽  
Vol 3 (8) ◽  
pp. 1873-1888 ◽  
Author(s):  
M. Maret ◽  
F. Lançon ◽  
L. Billard

1988 ◽  
Vol 49 (10) ◽  
pp. 1731-1736 ◽  
Author(s):  
M.V. Feigel'man ◽  
V.M. Vinokur

1972 ◽  
Vol 33 (C3) ◽  
pp. C3-135-C3-143 ◽  
Author(s):  
W. KOHN ◽  
J. OLSON

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-99-C4-102
Author(s):  
M. Grünewald ◽  
H. Müller ◽  
P. Thomas ◽  
D. Würtz

1996 ◽  
Vol 166 (3) ◽  
pp. 247-278 ◽  
Author(s):  
V.L. Kuz'min ◽  
Vadim P. Romanov

1978 ◽  
Vol 126 (10) ◽  
pp. 233-268 ◽  
Author(s):  
I.Ya. Korenblit ◽  
E.F. Shender
Keyword(s):  

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