title: Magnetically controlled single-nanoparticle detection via particle-electrode collisions.
abstract: This paper reports the magnetic control of nanoparticle collisions on gold ultramicroelectrode surface. Magnetite nanoparticles with diameters of 10 nm and modified with Prussian blue (Fe3O4-NPs-PB) were directed by gravitational force on the electrode surface, and spikes in current-time transients were observed. By modulating a magnetic field parallel to the electrode surface, the number of nanoparticle collisions and the nanoparticle positions could be controlled.
authors.affiliation: Instituto de Química de São Carlos, Universidade de São Paulo, CEP: 780, 13560-970 São Carlos-SP, Brazil. frankcrespilho@iqsc.usp.br.
authors.forename: Germano P
authors.initials: GP
authors.lastname: Santos
authors.forename: Antonio F A A
authors.initials: AF
authors.lastname: Melo
authors.forename: Frank N
authors.initials: FN
authors.lastname: Crespilho
mesh_terms: D005295:Ferrocyanides / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D060526:Magnetic Fields; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008839:Microelectrodes; D013499:Surface Properties
chemical_list: D005295:Ferrocyanides; D058185:Magnetite Nanoparticles; D006046:Gold; C000170:ferric ferrocyanide