The Experts below are selected from a list of 246 Experts worldwide ranked by ideXlab platform
Renliang Xu - One of the best experts on this subject based on the ideXlab platform.
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Light Scattering a review of particle characterization applications
Particuology, 2015Co-Authors: Renliang XuAbstract:Abstract This review covers the progress of Light Scattering applications in the field of particle characterization in the past decade. The review addresses static Light Scattering (the measurement of Scattering intensities due to Light–particle interaction at various spatial locations), dynamic Light Scattering (the measurement of Scattering due to Light–particle interaction as a function of time), and Scattering tracking analysis (the tracking of particle movement through Scattering measurement).
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particle characterization Light Scattering methods
2000Co-Authors: Renliang XuAbstract:Preface. Acknowledgements. 1. Particle Characterization - An Overview. 2. Light Scattering - The Background Information. 3. Laser Diffraction - Sizing from Nanometers to Millimeters. 4. Optical Particle Counting - Counting and Sizing. 5. Photon Correlation Spectroscopy - Submicron Particle Characterization. 6. Electrophoretic Light Scattering - Zeta Potential Measurement. Appendices. Author Index. Subject Index.
F. Ross Hallett - One of the best experts on this subject based on the ideXlab platform.
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Particle size analysis by dynamic Light Scattering
Food Research International, 2003Co-Authors: F. Ross HallettAbstract:Abstract Dynamic Light Scattering is an established technique for measuring the average size and size distribution of particles in a suspension. The technique has the advantage of being fast and non-invasive, but it does require low particle concentrations. As well, dynamic Light Scattering results are often open to misinterpretation if one is unaware of the state of the sample and the method of data analysis. The following discussion reviews some of the basic concepts of dynamic Light Scattering and outlines some of the pitfalls that are often encountered in data interpretation. A modification of dynamic Light Scattering, diffusing wave spectroscopy, can be used to obtain approximate size information at higher particle concentrations. The fundamentals of this new technique are summarized.
Liang Rong-yuan - One of the best experts on this subject based on the ideXlab platform.
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The Application of Resonance Light Scattering Technique in the Environmental Analysis
Environmental Monitoring in China, 2006Co-Authors: Liang Rong-yuanAbstract:Resonance Light Scattering (RLS) technique is a novel analytic technique using the normal fluorospectrophotometer to detect. This paper briefly states the Light Scattering phenomenon, the resonance Light Scattering principles and its quantitative basis. The simple research is made on the applications of the technique in the environmental analysis.
Shinsaku Takagi - One of the best experts on this subject based on the ideXlab platform.
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Phase-coherent Light Scattering spectroscopy. II. Depolarized dynamic Light Scattering
The Journal of Chemical Physics, 2001Co-Authors: Shinsaku Takagi, Hajime TanakaAbstract:In our preceding paper, we demonstrate the basic principle of the phase-coherent Light Scattering (COLS) method, focusing on polarized Light Scattering. In this paper we describe the principle of depolarized COLS. We explain how to excite coherent orientational motion of molecules in liquids and transverse sound waves in amorphous solids by using the electric-field grating, which is generated by crossing two cw laser beams in the media. We also explain how to observe complex spectra of depolarized Light Scattering from these anisotropic modes. The advantage of COLS over the conventional method is also discussed.
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Phase-coherent Light Scattering spectroscopy. I. General principle and polarized dynamic Light Scattering
The Journal of Chemical Physics, 2001Co-Authors: Hajime Tanaka, Shinsaku TakagiAbstract:Conventional Light Scattering methods measure Light scattered by spontaneously excited fluctuations and provide its power spectrum. Since modes are thermally excited, their phases are random and do not have any physical meaning. Different from the basic principle of these conventional methods, we recently proposed a new method of Light Scattering providing “complex” spectra instead of power spectra. We call this new method the “(phase-)coherent Light Scattering method.” It is based on a new measurement principle: Coherent modes having phase information are generated resonantly by an optically induced scanning interference pattern. By a phase-sensitive detection of the Light scattered by the optically generated coherent modes, complex resonance spectra of these modes can be measured. This principle is applicable to any modes in condensed matter, including thermal and concentration diffusion modes, rotational modes, propagating sound modes (longitudinal and transverse phonons), and surface modes (ripplons a...
Jan Sefcik - One of the best experts on this subject based on the ideXlab platform.
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Interpretation of Light Scattering and turbidity measurements in aggregated systems: effect of intra-cluster multiple-Light Scattering
The journal of physical chemistry. B, 2009Co-Authors: Miroslav Soos, Marco Lattuada, Jan SefcikAbstract:In this work we studied the effect of intracluster multiple-Light Scattering on the Scattering properties of a population of fractal aggregates. To do so, experimental data of diffusion-limited aggregation for three polystyrene latexes with similar surface properties but different primary particle diameters (equal to 118, 420, and 810 nm) were obtained by static Light Scattering and by means of a spectrophotometer. In parallel, a population balance equation (PBE) model, which takes into account the effect of intracluster multiple-Light Scattering by solving the T-matrix and the mean-field version of T-matrix, was formulated and validated against time evolution of the root mean radius of gyration, , of the zero angle intensity of scattered Light, I(0), and of the turbidity, tau. It was found that the mean-field version of the T-matrix theory is able to correctly predict the time evolution of all measured Light Scattering quantities for all sizes of primary particles without any adjustable parameter. The structure of the aggregates, characterized by fractal dimension, d(f), was independent of the primary particle size and equal to 1.7, which is in agreement with values found in literature. Since the mean-field version of the T-matrix theory used is rather complicated and requires advanced knowledge of cluster structure (i.e., the particle-particle correlation function), a simplified version of the Light Scattering model was proposed and tested. It was found that within the range of operating conditions investigated, the simplified version of the Light Scattering model was able to describe with reasonable accuracy the time evolution of all measured Light Scattering quantities of the cluster mass distribution (CMD) for all three sizes of primary particles and two values of the laser wavelength.
