title: Ion-specific forces between a colloidal nanoprobe and a charged surface.
abstract: We investigate the effect of ion-specific potentials on the force between a nanoprobe attached to a cantilever tip, and a charged surface. The probe is treated as a spherical nanoparticle with constant charge. A modified Poisson-Boltzmann equation in bispherical coordinates is used to address this problem in a more quantitative way. We predict that the ion-specific series of measured forces depend on the sign and magnitude of surface charge densities.
authors.affiliation: Escola de Química, Universidade Federal do Rio de Janeiro, Cidade UniversitAria, CEP 21949-900, Rio de Janeiro, RJ, Brazil.
authors.forename: E R A
authors.initials: ER
authors.lastname: Lima
authors.forename: E C
authors.initials: EC
authors.lastname: Biscaia
authors.forename: M
authors.initials: M
authors.lastname: Boström
authors.forename: F W
authors.initials: FW
authors.lastname: Tavares
mesh_terms: D000327:Adsorption; D003102:Colloids / Q000737:chemistry*; D004573:Electrolytes / Q000737:chemistry*; D007477:Ions; D008958:Models, Molecular; D053758:Nanoparticles / Q000737:chemistry*; D016012:Poisson Distribution; D055672:Static Electricity; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D003102:Colloids; D004573:Electrolytes; D007477:Ions