Correction to Scattering of Disklike Particle Suspensions: Evidence for Repulsive Interactions and Large Length Scale Structure from Static Light Scattering and Ultra-Small-Angle Neutron Scattering

Langmuir ◽  
2010 ◽  
Vol 26 (15) ◽  
pp. 13020-13020
Author(s):  
Surita Bhatia ◽  
John Barker ◽  
Ahmed Mourchid
Keyword(s):  
Light Scattering ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Scale Structure ◽  
Static Light Scattering ◽  
Length Scale ◽  
Particle Suspensions ◽  
Large Length ◽  
Large Length Scale

Ultra-small-angle neutron scattering from dense micrometre-sized colloidal systems: data evaluation and comparison with static light scattering

2006 ◽  
Vol 39 (2) ◽  
pp. 202-208 ◽  
Author(s):  
Josef Innerlohinger ◽  
Mario Villa ◽  
Matthias Baron ◽  
Otto Glatter
Keyword(s):  
Light Scattering ◽  
Neutron Scattering ◽  
Multiple Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Static Light Scattering ◽  
The Other ◽  
Data Evaluation ◽  
Scattering Data ◽  
Other Hand

Ultra-small-angle neutron scattering (USANS) probes the sameqregime as static light scattering (LS), making USANS an additional tool for the study of structures between 100 nm and 10 µm. Dense oil-in-water emulsions, which have already been characterized intensively by light scattering, are investigated in this study as a model system using USANS. The two basic problems of such scattering studies are the following: on the one hand, one has to use different scattering theories for USANS and LS, and on the other hand, in both cases one has to deal not only with particle interactions but also with multiple-scattering effects. For neutron scattering it is always possible to use the simpler Rayleigh–Debye–Gans (RDG) theory instead of the Lorenz–Mie theory, which generally describes light scattering from micrometre-sized globular objects. The samples have different contrasts in neutron and light scattering, such that only low-contrast (close to index match) LS data can be interpreted by the RDG theory. The data evaluation is performed by means of the generalized indirect Fourier transformation (GIFT) method, which enables the simultaneous calculation of the form and structure factors. The results are discussed and compared with those from light scattering experiments, taking into account the advantages of both methods. The effect of multiple scattering and its influence on data evaluation is also examined. Data evaluation by applying the GIFT method works well for both neutron and light scattering data, with results of comparable quality. The advantages of light scattering are the fast data acquisition and the large number of data points. USANS, on the other hand, covers a widerqrange and the problem of multiple scattering is not as severe as for light scattering, but still must not be neglected.

Small-Angle Neutron Scattering and 27Al Nmr Studies on the Microstructure and Composition of Alumina Sol-Gels

1990 ◽  
Vol 180 ◽  
Author(s):  
L. F. Nazar ◽  
D. G. Napier ◽  
D. Lapham ◽  
E. Epperson
Keyword(s):  
Light Scattering ◽  
Neutron Scattering ◽  
Acid Concentration ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Fractal Dimensions ◽  
Static Light Scattering ◽  
Scattering Data ◽  
Wide Range ◽  
Alumina Sol

ABSTRACTWe have used small angle neutron scattering, static light scattering and 27Al NMR to examine the structure and composition of alumina sol-gels formed by the hydrolysis of aluminum alkoxides. For LT sols at low acid concentrations, and HT gels over a wide range of acid concentration, 27Al solution NMR suggests, by the dearth of spectral resonances, that high molecular weight species are being formed. Analysis of the small angle neutron scattering data in the Porod regime indicates these sol-gels exhibit a power-law dependence consistent with mass fractal dimensions ranging from 1.45 to 1.8. These fractal dimensions are consistent with models based on diffusion limited cluster aggregation. The fractal dimensions do not differ significantly between LT and HT sols at the same acid concentration. However, for both temperature regimes, the fractal dimension increases with increasing acid concentration, suggesting a progression to a more compact network. Static light scattering measurements indicate the Guiner radii of the cluster aggregates vary from 600 to 2000Å.

Small-angle neutron scattering and light scattering studies on the miscibility of protonated polyisoprene/deuterated polybutadiene blends

1991 ◽  
Vol 24 (8) ◽  
pp. 1813-1819 ◽  
Author(s):  
Hirokazu Hasegawa ◽  
Shinichi Sakurai ◽  
Mikihito Takenaka ◽  
Takeji Hashimoto ◽  
Charles C. Han
Keyword(s):  
Light Scattering ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering

scholarly journals Effect of red blood cell shape changes on haemoglobin interactions and dynamics: a neutron scattering study

2020 ◽  
Vol 7 (10) ◽  
pp. 201507
Author(s):  
Keyun Shou ◽  
Mona Sarter ◽  
Nicolas R. de Souza ◽  
Liliana de Campo ◽  
Andrew E. Whitten ◽  
...  
Keyword(s):  
Blood Cell ◽  
Neutron Scattering ◽  
Protein Interactions ◽  
Red Blood Cell ◽  
Small Angle ◽  
Time Scale ◽  
Small Angle Neutron Scattering ◽  
Length Scale ◽  
Elastic Neutron ◽  
Shape Changes

By using a combination of experimental neutron scattering techniques, it is possible to obtain a statistical perspective on red blood cell (RBC) shape in suspensions, and the inter-relationship with protein interactions and dynamics inside the confinement of the cell membrane. In this study, we examined the ultrastructure of RBC and protein–protein interactions of haemoglobin (Hb) in them using ultra-small-angle neutron scattering and small-angle neutron scattering (SANS). In addition, we used the neutron backscattering method to access Hb motion on the ns time scale and Å length scale. Quasi-elastic neutron scattering (QENS) experiments were performed to measure diffusive motion of Hb in RBCs and in an RBC lysate. By using QENS, we probed both internal Hb dynamics and global protein diffusion, on the accessible time scale and length scale by QENS. Shape changes of RBCs and variation of intracellular Hb concentration were induced by addition of the Na + -selective ionophore monensin and the K + -selective one, valinomycin. The experimental SANS and QENS results are discussed within the framework of crowded protein solutions, where free motion of Hb is obstructed by mutual interactions.

Wormlike Micellar Aggregates of Saponins from Ilex paraguariensis A. St. Hil. (mate): A Characterisation by Cryo-TEM, Rheology, Light Scattering and Small-Angle Neutron Scattering

2011 ◽  
Vol 100 (2) ◽  
pp. 536-546 ◽  
Author(s):  
Maria Paula G. Peixoto ◽  
Janine Treter ◽  
Pedro Ernesto de Resende ◽  
Nádya Pesce da Silveira ◽  
George G. Ortega ◽  
...  
Keyword(s):  
Light Scattering ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Ilex Paraguariensis ◽  
Micellar Aggregates
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