Contact: Francesca Gorini
Date: April 26, 2017
A collaboration among Cnr, University of Naples, University of Cincinnati and Procter and Gamble (P&G) led to the Differential Variance Analysis (DVA), a novel method to investigate the relaxation process of soft materials, from fast-moving consumer goods to biological tissues
Rome, Italy—The class of materials known as ‘soft matter’ includes a wide variety of products and foods from the everyday life, such as shampoo, toothpaste, shaving foam, milk, yogurt, mayonnaise, as well as the majority of biological fluids and tissues.
The hallmark of these materials consists of unique mechanical properties, which are in between the liquid and solid state. Such a hybrid nature, which is macroscopically manifested, arises from the way particle move and rearrange at the microscopic scale. This process, known as ‘structural relaxation’, displays complex features, often due to the emergence of collective and heterogeneous dynamics: unlike simple liquids, soft matter forming particles tend to move cooperatively, as the displacement of a single particle requires the rearrangement of many other neighbours.
A recent collaboration among Cnr, University of Naples Federico II (Unina), University of Cincinnati (Ohio, USA) and the Procter and Gamble Co. (P&G) led to the Differential Variance Analysis (DVA) a novel method to measure and visualize the ‘relaxation process’ in soft materials. The work, now published in Scientific Reports (Nature Publishing Group), was performed across Naples (Italy) and the P&G Labs of Cincinnati (Ohio, USA) by Raffaele Pastore (Spin-Cnr), Giuseppe Pesce (Dept. of Physics, University of Naples) and Marco Caggioni (P&G, Cincinnati).