Investigation of cluster formation in reversed micelles systems by the method of correlation spectroscopy of scattered light

2007 ◽  
Vol 4 (1) ◽  
pp. 61-65 ◽  
Author(s):  
A V Potapov ◽  
D B Alekseev ◽  
I G Alekseeva ◽  
A M Saletsky
Keyword(s):  
Scattered Light ◽  
Cluster Formation ◽  
Reversed Micelles ◽  
Correlation Spectroscopy ◽  
Method Of Correlation

A variant method of correlation spectroscopy

1987 ◽  
Vol 46 (5) ◽  
pp. 500-504
Author(s):  
�. L. Al'tman ◽  
A. I. Lopatin ◽  
Yu. P. Turunov
Keyword(s):  
Correlation Spectroscopy ◽  
Variant Method ◽  
Method Of Correlation

Scattered-light correlation spectroscopy of structural changes in aqueous systems

1992 ◽  
Vol 57 (1-2) ◽  
pp. 647-650
Author(s):  
M. V. Berezin ◽  
L. A. Dergacheva ◽  
L. V. Levshin ◽  
I. V. Mitin ◽  
A. M. Saletskii
Keyword(s):  
Structural Changes ◽  
Scattered Light ◽  
Correlation Spectroscopy ◽  
Aqueous Systems

scholarly journals Photon Correlation Spectroscopy Using Optical Heterodyne Detection

1981 ◽  
Vol 34 (5) ◽  
pp. 575 ◽  
Author(s):  
Guy C Fletcher ◽  
Julienne I Harnett
Keyword(s):  
Scattered Light ◽  
Local Oscillator ◽  
Correlation Spectroscopy ◽  
Polystyrene Latex ◽  
Heterodyne Detection ◽  
Experimental Comparison ◽  
Statistical Accuracy ◽  
Theoretical Predictions ◽  
Heterodyne Technique ◽  
Optical Heterodyne Detection

The detection by optical heterodyning of laser light scattered from solutions of macromolecules offers significant improvement in statistical accuracy over the more usual self-beating method. Nevertheless the heterodyne technique is not commonly used because of the supposed ifficulties associated with stable and efficient mixing of the scattered light with a local oscillator beam. We have carried out an experimental comparison of several methods of mixing the two beams, using very dilute solutions of polystyrene latex spheres as scatterers. Experimental data are also presented for the apparent particle radius as a function of the local oscillator level, and are compared with theoretical predictions.

Sequential Extraction of Late Exponentials (SELE): A technique for deconvolving multimodal correlation curves in Dynamic Light Scattering

MRS Advances ◽  
2020 ◽  
Vol 5 (17) ◽  
pp. 865-880 ◽  
Author(s):  
Preethi L Chandran
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Sequential Extraction ◽  
Time Scales ◽  
Scattered Light ◽  
Correlation Spectroscopy ◽  
Least Square ◽  
Multiple Time Scales ◽  
Multiple Time ◽  
Correlation Curve

Abstract:In techniques such as Dynamic Light Scattering (DLS), Fluorescence Correlation Spectroscopy, and image mining, motion is tracked by the autocorrelation of a signal over logarithmic time scales. For instance the tracking signal in DLS is the scattered light intensity; it remains correlated at time scales where scant changes in the arrangement of the scattering particles occur, but decays exponentially at the time scales of their diffusion. When there are multiple time scales of motion (for instance due to scatterers of different sizes), the correlation curve has more than one exponential fall. Extracting the decay constants or hydrodynamic sizes due to each exponential fall in a multi-species field correlation curve becomes an ill-conditioned mathematical problem. We describe a new algorithm to invert a multi-modal correlation curve by Sequential Extraction of the Late Exponentials (SELE). The idea is that while the inversion of a multi-exponential equation may be ill posed, that of a single exponential is not. So we fit data windows towards to base of the correlation curve to extract the largest contribution species, remove the species contribution from the correlation curve, and repeat the process with the remnant curve. The single exponent can be robustly fitted by least-square minimization with initial guesses generated by an adapted cumutant technique (power-series) that includes stretch coefficients (measure of sample dispersity). The proposed algorithm resolves particle sizes separated by 3X, and is reliable against fluctuations in the correlation curve and to localized regions of suboptimal data. The algorithm can be used to track particle dynamics in solution in multi-species problems such as self-assembly.

Measurement of the diffusion of anisotropic particles in an external field by the method of correlation spectroscopy

1986 ◽  
Vol 29 (2) ◽  
pp. 141-143
Author(s):  
N. K. Nadirov ◽  
�. A. Manykin ◽  
S. M. Burkitbaev ◽  
M. I. Sharonov
Keyword(s):  
External Field ◽  
Correlation Spectroscopy ◽  
Anisotropic Particles ◽  
Method Of Correlation

Analysis of noises in photocurrent time‐correlation spectroscopy of scattered light

1976 ◽  
Vol 47 (2) ◽  
pp. 729-735 ◽  
Author(s):  
Kunitsugu Soda ◽  
Izumi Nishio ◽  
Akiyoshi Wada
Keyword(s):  
Scattered Light ◽  
Time Correlation ◽  
Correlation Spectroscopy

Measurement of cluster formation in aqueous citric acid solutions by photon correlation spectroscopy

1993 ◽  
Vol 134 (3-4) ◽  
pp. 196-202 ◽  
Author(s):  
M.A. van Drunen ◽  
R. Finsy ◽  
H.G. Merkus ◽  
B. Scarlett ◽  
G.M. van Rosmalen
Keyword(s):  
Citric Acid ◽  
Photon Correlation Spectroscopy ◽  
Cluster Formation ◽  
Correlation Spectroscopy ◽  
Acid Solutions ◽  
Photon Correlation
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