title: Compact Ag@Fe3O4 core-shell nanoparticles by means of single-step thermal decomposition reaction.
abstract: A temperature pause introduced in a simple single-step thermal decomposition of iron, with the presence of silver seeds formed in the same reaction mixture, gives rise to novel compact heterostructures: brick-like Ag@Fe3O4 core-shell nanoparticles. This novel method is relatively easy to implement, and could contribute to overcome the challenge of obtaining a multifunctional heteroparticle in which a noble metal is surrounded by magnetite. Structural analyses of the samples show 4 nm silver nanoparticles wrapped within compact cubic external structures of Fe oxide, with curious rectangular shape. The magnetic properties indicate a near superparamagnetic like behavior with a weak hysteresis at room temperature. The value of the anisotropy involved makes these particles candidates to potential applications in nanomedicine.
authors.affiliation: Instituto de Física Gleb Wataghin - Universidade Estadual de Campinas (UNICAMP) 13083-970 Campinas (SP) Brasil.
authors.forename: Maria Eugênia F
authors.initials: ME
authors.lastname: Brollo
authors.affiliation: Instituto de Física Gleb Wataghin - Universidade Estadual de Campinas (UNICAMP) 13083-970 Campinas (SP) Brasil.
authors.forename: Román
authors.initials: R
authors.lastname: López-Ruiz
authors.affiliation: Instituto de Física Gleb Wataghin - Universidade Estadual de Campinas (UNICAMP) 13083-970 Campinas (SP) Brasil.
authors.forename: Diego
authors.initials: D
authors.lastname: Muraca
authors.affiliation: Brazilian Synchrotron Light Laboratory (LNLS)/Brazilian Center of Energy and Materials (CNPEM) CP6192, 13083-970 Campinas (SP) Brasil.
authors.forename: Santiago J A
authors.initials: SJ
authors.lastname: Figueroa
authors.affiliation: Instituto de Física Gleb Wataghin - Universidade Estadual de Campinas (UNICAMP) 13083-970 Campinas (SP) Brasil.
authors.forename: Kleber R
authors.initials: KR
authors.lastname: Pirota
authors.affiliation: Instituto de Física Gleb Wataghin - Universidade Estadual de Campinas (UNICAMP) 13083-970 Campinas (SP) Brasil.
authors.forename: Marcelo
authors.initials: M
authors.lastname: Knobel