title: Assessment of DNA complexation onto polyelectrolyte-coated magnetic silica nanoparticles.
abstract: The polyelectrolyte-DNA complexation method to form magnetoplexes using silica-coated iron oxide magnetic nanoparticles as inorganic substrates is an attractive and promising process in view of the potential applications including magnetofection, DNA extraction and purification, and directed assembly of nanostructures. Herein, we present a systematic physico-chemical study that provides clear evidence of the type of interactions established, reflects the importance of the DNA length, the nanoparticle size and the ionic strength, and permits the identification of the parameters controlling both the stability and the type of magnetoplexes formed. This information can be used to develop targeted systems with properties optimized for the various proposed applications of magnetoplexes.
authors.affiliation: Departamento de Física Aplicada, Universidade de Vigo, 36310, Vigo, Spain.
authors.forename: Ana B
authors.initials: AB
authors.lastname: Dávila-Ibáñez
authors.forename: Niklaas J
authors.initials: NJ
authors.lastname: Buurma
authors.forename: Verónica
authors.initials: V
authors.lastname: Salgueiriño
mesh_terms: D002151:Calorimetry; D004247:DNA / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry; D008280:Magnetics; D053758:Nanoparticles / Q000737:chemistry*; D009994:Osmolar Concentration; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; C000499:ferric oxide; D012822:Silicon Dioxide; D004247:DNA