Magnetic imaging of cyanide-bridged co-ordination nanoparticles grafted on FIB-patterned Si substrates.
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.
Ghirri
Alberto
A
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
Candini
Andrea
A
Evangelisti
Marco
M
Gazzadi
Gian Carlo
GC
Volatron
Florence
F
Fleury
Benoit
B
Catala
Laure
L
David
Christophe
C
Mallah
Talal
T
Affronte
Marco
M
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
D003486:Cyanides; D012825:Silicon