China
Africa
Explore chapters and articles related to this topic
Dispersion and Characterization of Nanoparticles
Published in Bertrand Henri Rihn, Biomedical Application of Nanoparticles, 2017
Didier Rouxel, Solenne Fleutot, Van Son Nguyen
Zeta potential is not a directly measurable parameter but it can be determined using appropriate theoretical models and experimental parameters. Zeta potential of nanoparticles is usually determined by electrophoresis. By measuring the velocity of nanoparticles in an electric field, the zeta potential can be calculated from electrophoretic mobility or dynamic electrophoretic mobility using the Henry equation.
Characterization Techniques
Published in Chandan Das, Sujoy Bose, Advanced Ceramic Membranes and Applications, 2017
Two electroacoustic effects are widely used for characterizing zeta potential: colloid vibration current and electric sonic amplitude. There are commercially available instruments, known as electrophoretic light scattering (ELS), for measuring dynamic electrophoretic mobility. This mobility is often transformed to zeta potential to enable comparison of materials under different experimental conditions.
Study on dispersion behavior of submicron cerium oxide particles in concentrated suspensions by ultrasonic attenuation technique
Published in Journal of Dispersion Science and Technology, 2023
Zixin Luo, Qilong Wei, Qiang Yang, Wei Gao
Both the classical and advanced theories were used to calculate zeta potential from measured dynamic electrophoretic mobility. The results from these two theories had difference as high as about 58%, as shown in Figure 9a. Besides, the condition of thin double layer was not satisfied for small particles because the Debye length (κ−1) was about 3 nm, as shown in Figure 10a. Thus, zeta potential by the advanced theory was adopted. It was found that zeta potential was about −110 mV at original pH 8.37, while it increased from about −90 mV to −50 mV during the titration.