title: Role of counter-substrate surface energy in macroscale friction of nanofiber arrays.
abstract: The effect of counter-substrate surface energy on macroscale friction of nanofiber array is studied. Low-density polyethylene (LDPE) fibrillar array fabricated from silicon nanowire template is tested against glass substrates modified with various self-assembled monolayers, which exhibit a wide range of surface energy. A large drop in friction over a narrow range of surface energy is observed and explained in terms of drastically reduced number of fibers in actual contact, in addition to the reduced surface energy. The relationship between surface energy and fiber engagement is discussed with Johnson-Kendall-Roberts (JKR) and elastic beam models.
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States.
authors.forename: Yongkwan
authors.initials: Y
authors.lastname: Kim
authors.forename: Francesca
authors.initials: F
authors.lastname: Limanto
authors.forename: Dae Ho
authors.initials: DH
authors.lastname: Lee
authors.forename: Ronald S
authors.initials: RS
authors.lastname: Fearing
authors.forename: Roya
authors.initials: R
authors.lastname: Maboudian
mesh_terms: D057139:Nanofibers / Q000737:chemistry*; D036103:Nanotechnology; D053770:Nanowires / Q000737:chemistry; D010316:Particle Size; D020959:Polyethylene / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D020959:Polyethylene; D012825:Silicon