title: Magnetic imaging of cyanide-bridged co-ordination nanoparticles grafted on FIB-patterned Si substrates.
abstract: Prussian blue CsNiCr nanoparticles are used to decorate selected portions of a Si substrate. For successful grafting to take place, the Si surface needs first to be chemically functionalized. Low-dose focused ion beam patterning on uniformly functionalized surfaces selects those portions that will not participate in the grafting process. Step-by-step control is assured by atomic force and high-resolution scanning electron microscopy, revealing a submonolayer distribution of the grafted nanoparticles. By novel scanning Hall-probe microscopy, an in-depth investigation of the magnetic response of the nanoparticles to varying temperature and applied magnetic field is provided. The magnetic images acquired suggest that low-temperature canted ferromagnetism is found in the grafted nanoparticles, similar to what is observed in the equivalent bulk material.
authors.affiliation: CNR-INFM National Research Center on nanoStructures and bioSystems at Surfaces (S3) and Dipartimento di Fisica, Università di Modena e Reggio Emilia, via Campi 213/a, 41100 Modena, Italy. alberto.ghirri@unimore.it
authors.forename: Alberto
authors.initials: A
authors.lastname: Ghirri
authors.forename: Andrea
authors.initials: A
authors.lastname: Candini
authors.forename: Marco
authors.initials: M
authors.lastname: Evangelisti
authors.forename: Gian Carlo
authors.initials: GC
authors.lastname: Gazzadi
authors.forename: Florence
authors.initials: F
authors.lastname: Volatron
authors.forename: Benoit
authors.initials: B
authors.lastname: Fleury
authors.forename: Laure
authors.initials: L
authors.lastname: Catala
authors.forename: Christophe
authors.initials: C
authors.lastname: David
authors.forename: Talal
authors.initials: T
authors.lastname: Mallah
authors.forename: Marco
authors.initials: M
authors.lastname: Affronte
mesh_terms: D003486:Cyanides / Q000737:chemistry*; D008280:Magnetics; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D003486:Cyanides; D012825:Silicon