Characterization of Liquids, Nano- and Microparticulates, and Porous Bodies using Ultrasound

Andrei S. Dukhin is CEO and Co-Founder of Dispersion Technology, Inc., USA. He has been a leader in the development of a new technology for characterizing complex liquids that employs ultrasound for characterizing interfacial chemistry, particle size, and rheological properties of said systems. He has authored three books published by Elsevier, most recently Characterization of Liquids, Nano- and Microparticulates, and Porous Bodies using Ultrasound with Philip J. Goetz back in 2010. He holds 7 USA patents on electroacoustic methods of measuring zeta potential and has published more than 120 scientific papers. He established Dispersion Technology Inc, which installs more than 850 instruments for measuring zeta potential in 30 countries. Philip J. Goetz has an Electrical Engineering bachelor degree (MIT) and an MS in Computer Science (New York University). Between 1960–1970, he was an Engineering Group leader developing doppler radar technology for military airborne navigation and image recognition hardware for airborne terrain guidance. He has been President, chief scientist and founder of a new venture for developing electro-optical instrumentation for characterizing the zeta potential of dilute colloids. From 1996 – 2010 he was Chairman and co-founder of Dispersion Technology for the development of ultrasound instrumentation for complex characterization of concentrated colloids.

Selected Papers: Introduction; Historical overview; Advantages of ultrasound over traditional characterization techniques. Fundamentals of Interface and Colloid Science: Real and model dispersions; Parameters of the model dispersion medium; Parameters of the model dispersed phase; Parameters of the model interfacial layer; Interactions in colloid and interface science; Traditional particle sizing. Fundamentals of Acoustics in Liquids: Longitudinal waves and the wave equation; Acoustics and its relation to rheology; Acoustic impedance; Propagation through phase boundaries - reflection; Propagation in porous media; Chemical composition influence. Acoustic Theory for Particulates: Extinction=absorption + scattering; Superposition approach; Acoustic theory for a dilute system; Ultrasound absorption in concentrates; Ultrasound scattering; Input parameters. Electroacoustic Theory: The theory of Ion Vibration Potential (IVP); The low frequency electroacoustic limit - Smoluchowski limit (SDEL); The O'Brien theory; The colloid vibration current in concentrated systems; Qualitative analysis. Experimental Verification of the Acoustic and Electroacoustic Theories: Viscous losses; Thermal losses; Structural losses; Scattering losses; Electroacoustic phenomena; Acoustic and Electroacoustic Measurement Techniques; Historical perspective; Difference between measurement and analysis; Measurement of attenuation and sound speed using interferometry; Measurement of attenuation and sound speed using the transmission technique; Precision, accuracy, and dynamic range for transmission measurements; Analysis of attenuation and sound speed to yield desired outputs; Measurement of electroacoustic properties; Zeta potential calculation from the analysis of CVI; Measurement of acoustic impedance. Applications of Acoustics for Characterizing Particulate Systems: Characterization of aggregation and flocculation; Stability of emulsions and microemulsions; Particle sizing in mixed colloids with several dispersed phases; Chemical-mechanical polishing; Large particle resolution; Titration using electroacoustics; Colloids with high ionic strength - electroacoustic background; Effect of air bubbles; Table of applications.