title: Cleaning Dirty Surfaces: A Three-Body Problem.
abstract: Human interaction with touch screens requires physical touch and hence results in contamination of these surfaces, resulting in the necessity of cleaning. In this study we discuss the three bodies of this problem and how each component contributes and can be controlled. Utilizing a standard fingerprint machine and a standard cleanability test, this study examines the influence of parameters such as the wiping speed and pressure, the material and surface area of the cloths, and the surface energy of the contaminated surfaces. It was shown that fingerprint contamination undergoes shear banding and hence is not easily removed. The degree of material removal depends on the position of the shear plane, which is influenced by surface energies and shear rates.
authors.affiliation: Future Industries Institute, University of South Australia , Mawson Lakes, South Australia 5095, Australia.
authors.forename: Bastian
authors.initials: B
authors.lastname: Stoehr
authors.affiliation: Future Industries Institute, University of South Australia , Mawson Lakes, South Australia 5095, Australia.
authors.forename: Colin
authors.initials: C
authors.lastname: Hall
authors.affiliation: Future Industries Institute, University of South Australia , Mawson Lakes, South Australia 5095, Australia.
authors.forename: Drew
authors.initials: D
authors.lastname: Evans
authors.affiliation: Future Industries Institute, University of South Australia , Mawson Lakes, South Australia 5095, Australia.
authors.forename: Peter
authors.initials: P
authors.lastname: Murphy
keywords: easy-to-clean; fingerprint; hydrophobic; oleophobic; omniphobic; surface energy; touch screen