Particles small angle forward-scattered light measurement based on photovoltaic cell microflow cytometer

2013 ◽  
Vol 35 (2-3) ◽  
pp. 337-344 ◽  
Author(s):  
Han-Taw Chen ◽  
Lung-Ming Fu ◽  
Hsing-Hui Huang ◽  
Wei-En Shu ◽  
Yao-Nan Wang
Keyword(s):  
Small Angle ◽  
Scattered Light ◽  
Photovoltaic Cell ◽  
Light Measurement ◽  
Microflow Cytometer

Smoke-scattered light measurement of turbulent concentration fluctuations

1961 ◽  
Vol 15 (1-2) ◽  
pp. 111-129 ◽  
Author(s):  
Ronald E. Rosensweig ◽  
Hoyt C. Hottel ◽  
Glenn C. Williams
Keyword(s):  
Scattered Light ◽  
Concentration Fluctuations ◽  
Light Measurement

Effect of the degree of neutralization on the micellization of block ionomers

1995 ◽  
Vol 73 (11) ◽  
pp. 2086-2093 ◽  
Author(s):  
Karine Khougaz ◽  
Diep Nguyen ◽  
Adi Eisenberg ◽  
Claudine E. Williams
Keyword(s):  
Light Scattering ◽  
Block Copolymers ◽  
Small Angle ◽  
Dynamic Equilibrium ◽  
Scattered Light ◽  
Single Chain ◽  
X Ray ◽  
X Ray Scattering ◽  
Freeze Dried ◽  
Ray Scattering

The effect of neutralization on the micellization of polystyrene-b-poly(acrylic acid) (PS-b-PAA) was investigated by static light scattering (SLS) and small-angle X-ray scattering (SAXS). The block copolymers, present initially in single chain form in either dioxane or benzene–methanol (90/10 (v/v)), were neutralized to different degrees by the addition of cesium hydroxide dissolved in methanol. The solutions were simultaneously monitored by SLS. It was found that micelle formation began near 5% neutralization. The normalized scattered light intensity at 90° (I90/c) increased dramatically in the neutralization range between ca. 10 and 60%. For neutralization degrees between 60 and ca. 100%, I90/c did not change significantly with a further increase in the percent of neutralization. In the second part of the study, two block copolymers, PS(600)-b-PAA(34) and PS(600)-b-PAA(45) (the number of monomer units is given in parentheses), were prepared from benzene–methanol (90/10 (v/v)) with different degrees of neutralization: 5, 25, 60, 100, and 150%. The resulting solutions were freeze-dried and the dried samples were redissolved in toluene. These samples were investigated by SLS and SAXS. By SLS, the aggregation numbers (f) were found to be the same between 5 and 60% neutralization. An increase in f was observed in going from 60 to 100%; i.e., f increased from 82 to 92 for PS(600)-b-PAA(34), and from 79 to 110 for PS(600)-b-PAA(45). The f values for the two block copolymers at 150% neutralization were found to be the same as those for 100% neutralization. The core radii values (Rcore) were measured for the neutralized PS(600)-b-PAA(45) samples at 0.05 g/mL in toluene by SAXS. The Rcore values increased from 5 to 60% neutralization, remained constant from 60 to 100%, and increased again in the range from 100 to 150%. The results are explained by dynamic considerations. For low percent neutralization, between 5 and 60%, the micelles and single chains are proposed to be in a dynamic equilibrium state. For higher percent neutralization, between 60 and 100%, the dynamics are probably much slower. Keywords: block copolymers, micelles, ionomers, light scattering, small angle X-ray scattering (or SAXS).

Scattered light measurement of the circular birefringence in a twisted single mode fiber

1982 ◽  
Vol 41 (3) ◽  
pp. 164-168 ◽  
Author(s):  
P. Graindorge ◽  
K. Thyagarajan ◽  
H. Arditty ◽  
M. Papuchon
Keyword(s):  
Scattered Light ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Light Measurement

scholarly journals An Effective On-line Polymer Characterization Technique by Using SALS Image Processing Software and Wavelet Analysis

2008 ◽  
Vol 2008 ◽  
pp. 1-10
Author(s):  
Guang-ming Xian ◽  
Jin-ping Qu ◽  
Bi-qing Zeng
Keyword(s):  
Image Processing ◽  
Light Scattering ◽  
Wavelet Analysis ◽  
Small Angle ◽  
Scattered Light ◽  
Polymer Characterization ◽  
On Line ◽  
Small Angle Light Scattering ◽  
Processing Software ◽  
Image Processing Software

This paper describes an effective on-line polymer characterization technique by using small-angle light-scattering (SALS) image processing software and wavelet analysis. The phenomenon of small-angle light scattering has been applied to give information about transparent structures on morphology. Real-time visualization of various scattered light image and light intensity matrices is performed by the optical image real-time processing software for SALS. The software can measure the signal intensity of light scattering images, draw the frequency-intensity curves and the amplitude-intensity curves to indicate the variation of the intensity of scattered light in different processing conditions, and estimate the parameters. The current study utilizes a one-dimensional wavelet to delete noise from the original SALS signal and estimate the variation trend of maximum intensity area of the scattered light. So, the system brought the qualitative analysis of the structural information of transparent film success.

scholarly journals Scattered Light Measurement for the Birefringence Distribution Estimations

KnE Energy ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 309
Author(s):  
A N Vasilenko ◽  
I U Primak ◽  
A V Khomchenko
Keyword(s):  
Scattered Light ◽  
Light Measurement

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