Download Particle Characterization: Light Scattering Methods by Renliang Xu (auth.), Professor Brian Scarlett (eds.) PDF
By Renliang Xu (auth.), Professor Brian Scarlett (eds.)
Particle characterization is a vital part in product learn and improvement, manufacture, and quality controls of particulate fabrics and a tremendous instrument within the frontier of sciences, equivalent to in biotechnology and nanotechnology. This booklet systematically describes one significant department of recent particle characterization know-how - the sunshine scattering tools. this is often the 1st monograph in particle technological know-how and know-how masking the foundations, instrumentation, information interpretation, functions, and newest experimental improvement in laser diffraction, optical particle counting, photon correlation spectroscopy, and electrophoretic gentle scattering.
furthermore, a precis of all significant particle sizing and different characterization tools, simple records and pattern instruction suggestions utilized in particle characterization, in addition to nearly 500 newest references are supplied.
The ebook is a needs to for commercial clients of sunshine scattering innovations characterizing various particulate platforms and for undergraduate or graduate scholars who are looking to find out how to use gentle scattering to review specific fabrics, in chemical engineering, fabric sciences, actual chemistry and different comparable fields.
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Extra resources for Particle Characterization: Light Scattering Methods
1-100 µm) Different from acoustic attenuation spectroscopy, in electroacoustic spectral analysis, sound waves are generated by an applied high frequency electric field across a colloidal suspension and subsequently detected. This is called the electrokinetic sonic amplitude effect (ESA) . These sound waves arise because the alternating electric field pushes the suspended particle forwards and backwards. By measuring the magnitude and phase angle of the sound waves at multiple frequencies (typically from 1-10 MHz), the particle dynamic mobility, can be determined, provided the concentration and the density of the 24 CHAPTER 1 particles are known.
Vapor condenses onto the aerosols leading to much larger size particles which can then be detected and counted by an optical counter. Two schemes can be used to fractionate submicron aerosols. In the first scheme, called the diffusion battery method, particles pass through a stack of mesh screens. Because of diffusion they will collide with, and be captured by, the screen wires. Small particles will be captured first because they diffuse quickly and many more collisions with the screen wires will occur.
Likewise, in a Coulter Principle measurement, one would get and in a laser scattering experiment, one would get D4,3. The table below illustrates one example of how large the difference in the values can be, even for a very simple system. In this example we assume that there is a particle system that consists of four spherical particles with diameters of 1, 2, 3, and 10, respectively (the unit is irrelevant here). In size measurements their corresponding values are as follows: We can see from the above table that the mean sizes can be quite different if one uses an electron microscope , or a laser diffraction instrument to measure this four-particle system.