title: Field-induced adsorption exclusion of particles from one-dimensional nanomagnets.
abstract: I study the adsorption of paramagnetic colloids to one-dimensional nanomagnets. It is found that in the absence of external magnetic fields the colloids tend to adsorb to the nanomagnet by arranging themselves in a nearly close-packed formation, whereas in an external field some of the colloids are repelled due to dipolar interactions. I develop a theory for this phenomenon and show that it is in agreement with experimental data.
authors.affiliation: Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore. lars@ntu.edu.sg
authors.forename: L E
authors.initials: LE
authors.lastname: Helseth
mesh_terms: D000327:Adsorption; D003102:Colloids / Q000737:chemistry*; D004574:Electromagnetic Fields; D008956:Models, Chemical; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size
chemical_list: D003102:Colloids