Estimating the Density of Thin Polymeric Films Using Magnetic Levitation

• Published in: ACS nano Vol. 15; no. 10; pp. 15676 - 15686
• Main Authors: Root, Samuel E, Gao, Rui, Abrahamsson, Christoffer K, Kodaimati, Mohamad S, Ge, Shencheng, Whitesides, George M
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 26.10.2021
• Subjects: polymer films; magnetic levitation; density; interfacial confinement; thin films
• ISSN: 1936-0851; 1936-086X
• DOI: 10.1021/acsnano.1c04798

While the density is a central property of a polymer film, it can be difficult to measure in films with a thickness of ∼100 nm or less, where the structure of the interfaces and the confinement of the polymer chains may perturb the packing and dynamics of the polymers relative to the bulk. This Arti...