title: Self-assembly of polytetrafluoroethylene nanoparticle films using repulsive electrostatic interactions.
abstract: An approach for manufacturing polytetrafluoroethylene nanoparticle films using repulsive electrostatic interactions was developed. This approach used the strong repulsive force between colloidal nanoparticles and a substrate surface to cause the colloidal nanoparticles to suspend and self-assemble at a near-wall equilibrium position. A suspended monolayer was formed and was subsequently deposited on the substrate surface. A relatively large-area (3 × 3 cm(2)), close-packed unordered monolayer of polytetrafluoroethylene nanoparticles was observed. Multilayer nanoparticle films were also generated by increasing the particle concentration and deposition time. This work confirms the feasibility of nanoparticle self-assembly under repulsive electrostatic interactions and provides new routes for the large-area fabrication of monolayer and multilayer close-packed nanoparticle films.
authors.affiliation: State Key Laboratory of Tribology, Tsinghua University , Beijing 100084, P.R. China.
authors.forename: Chuan
authors.initials: C
authors.lastname: Du
authors.forename: Jiadao
authors.initials: J
authors.lastname: Wang
authors.forename: Darong
authors.initials: D
authors.lastname: Chen
mesh_terms: D003102:Colloids; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology; D010316:Particle Size; D011138:Polytetrafluoroethylene / Q000737:chemistry*; D055672:Static Electricity; D013499:Surface Properties
chemical_list: D003102:Colloids; D011138:Polytetrafluoroethylene