Dispersion Technology, Inc. (DTI) applications

Acoustic spectroscopy is a very simple method for sizing of nanoparticles. There are many examples published in the papers that are listed below. There is only one input parameter characterizing particles required for calculating particle size distribution at this size range – density of particles.  A big advantage of Acoustics over light-based methods is ability of characterizing broad particle size distributions, which include nano-size fractions. Our recent studies show that Acoustics could monitor presence of nanoparticles with precision of 1%. This is important for nano-ecology and nano-toxicology.

There are several developed applications with results published in the papers presented below.

Acoustics can characterize particle size and zeta potential in ceramic slurries with no dilution. There are several papers published on this subject.

There are two papers published on subject of applicability of ultrasound for characterizing CMP slurries, see below. There are also 2 newsletters, # 1 and # 13 on the same subject. Acoustics provides accurate particle size that agrees well with independent data. It can monitor presence of 1% large particles on the background of small nano-particles. Electroacoustics yields very precise value of zeta potential. These measurements can be done with no dilution, which opens possibility for continuous on-line control of the slurry properties. However, calculation of the particle size and zeta potential requires information on the volume fraction. This parameter must be independently measured.

Both ultrasound based methods, Acoustics and Electroacoustics, can be used for monitoring effects of the plastisizer on the properties of cement slurry, as proved in the papers listed below. With no dilution. Elimination of dilution is critical for accurate measurement of the cement zeta potential Cement slurry could be affect very strongly by dilution. Zeta potential probe offers zeta potential measurement with precision 0.1 mV.