Francis Starr, professor of physics, and Paul Hanakata ’14 are the co-authors of a new article published in the journal Nature Communications on June 16. The article, titled “Interfacial Mobility Scale Determines the Scale of Collective Motion and Relaxation Rate in Polymer Films,” is based off Hanakata’s senior thesis research at Wesleyan.
Thin polymer films are ubiquitous in manufacturing and medical applications. Their chemical and mechanical properties make them suitable as artificial soft biological tissue and there has been intense interest in how film thickness and substrate interactions influence film dynamics.
The nature of polymer rearrangements within these films determines their potential applications. However, up to now, there has been no way to readily assess how design choices of the film affect these dynamic rearrangements.
“Paul’s paper is novel because it demonstrates how an experimental measurement of the surface properties can be used to infer the changes to collective motions within the film,” Starr explained. “These results offer a practical metrology that might be used for the design of new advanced materials.”
Hanakata, who graduated in May, will begin his graduate studies at Boston University next fall.