and for characterizing phenomena such as sol–gel transitions 15 15. Catalano, “ Microglia-derived microvesicles affect microglia phenotype in glioma,” Front. Yang, “ Utilizing dynamic light scattering as a process analytical technology for protein folding and aggregation monitoring in vaccine manufacturing,” J. Angelini, “ Relaxation dynamics, softness, and fragility of microgels with interpenetrated polymer networks,” Macromolecules 53, 1596– 1603 (2020). Ruzicka, “ Study of network composition in interpenetrating polymer networks of poly(N isopropylacrylamide) microgels: The role of poly(acrylic acid),” J. Richtering, “ Relaxation in polymers,” in Dynamic Light Scattering From Polymer Solutions, Progress in Colloid and Polymer Science ( Steinkopff, 1989), pp. Bartsch, “ Re-entrant glass transition in a colloid-polymer mixture with depletion attractions,” Phys. Poon, “ Multiple glassy states in a simple model system,” Science 296, 104– 106 (2002). van Megen, “ Phase behaviour of concentrated suspensions of nearly hard colloidal spheres,” Nature 320, 340– 342 (1986). (94)00053-b However, the autocorrelation function itself is especially useful for investigating the microscopic dynamics of soft matter systems, including colloids, 7–9 7. Hallett, “ Dynamic light scattering: Applications to food systems,” Food Res. Nobbmann, “ Measuring sub nanometre sizes using dynamic light scattering,” J. This information can then be used to derive the hydrodynamic size of objects in suspension. DLS measures the stochastic temporal variations in the scattered laser light, resulting in a time autocorrelation function describing the timescales of mutual diffusive motion of the scattering objects. Scattering Methods Applied to Soft Condensed Matter ( Elsevier Science B.V., 2002). Pusey, “ Introduction to scattering experiments,” in Neutrons, X-Rays and Light. Light scattering has long been used for the characterization of soft matter and dynamic light scattering (DLS) has demonstrated itself to be a crucial and indispensable technique to investigate the dynamics.

Correlating the microscopic behavior with these macroscopic processes is thus a fertile ground for research. (00)00141-1 Soft materials also offer the possibility to investigate many of the key topics in soft condensed matter in general, such as slow reactions and kinetics, aging processes, gelation, controlled release, food processing, micellar growth, and aggregation phenomena. Likos, “ Effective interactions in soft condensed matter physics,” Phys. Pecora, Soft-Matter Characterization ( Springer, 2008). but which stem from their microscopic properties. Puertas, Fluids, Colloids and Soft Materials: An Introduction to Soft Matter Physics ( John Wiley & Sons, 2016), pp. They exhibit unique behaviors that are often fundamental to their applications in those industries 1 1. Soft materials are ubiquitous in a variety of industries, including foods, pharmaceuticals, personal care products, and cosmetics.

Dynamic light scattering ppt