title: Fabrication and characterization of multi-level hierarchical surfaces.
abstract: A nanostructured surface may exhibit low adhesion or high adhesion depending upon fibrillar density, and it presents the possibility of realizing eco-friendly surface structures with desirable adhesion by mimicking the mechanics of fibrillar adhesive surfaces of biological systems. The current research uses a patterning technique to fabricate smart adhesion surfaces: one-, two- and three-level hierarchical synthetic adhesive structure surfaces with various fibrillar densities and diameters. The contact angles and contact angle hysteresis were measured to characterize the wettability. A conventional and a glass ball attached to an atomic force microscope (AFM) tip were used to obtain the adhesive forces via force-distance curves and to study the buckling behavior of a single fiber on the hierarchical structures.
authors.affiliation: Nanoprobe Laboratory for Bio- & Nanotechnology and Biomimetics, The Ohio State University, Columbus, OH 43210, USA. Bhushan.2@osu.edu
authors.forename: Bharat
authors.initials: B
authors.lastname: Bhushan
authors.forename: Hyungoo
authors.initials: H
authors.lastname: Lee
mesh_terms: D000268:Adhesiveness; D000818:Animals; D001695:Biology / Q000379:methods; D002448:Cell Adhesion; D008566:Membranes / Q000737:chemistry; D018625:Microscopy, Atomic Force / Q000379:methods*; D008855:Microscopy, Electron, Scanning / Q000379:methods; D015233:Models, Statistical; D010825:Physics / Q000379:methods; D011076:Polycarboxylate Cement / Q000737:chemistry; D011126:Polypropylenes / Q000737:chemistry; D016062:Porosity; D013499:Surface Properties; D017155:Wettability
chemical_list: D011076:Polycarboxylate Cement; D011126:Polypropylenes; C005506:polycarbonate