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Magnetic Imaging of Cyanide‐Bridged Co‐ordination Nanoparticles Grafted on FIB‐Patterned Si Substrates
Author(s) -
Ghirri Alberto,
Candini Andrea,
Evangelisti Marco,
Gazzadi Gian Carlo,
Volatron Florence,
Fleury Benoit,
Catala Laure,
David Christophe,
Mallah Talal,
Affronte Marco
Publication year - 2008
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200800897
Subject(s) - materials science , prussian blue , nanoparticle , scanning electron microscope , nanotechnology , ferromagnetism , substrate (aquarium) , magnetic nanoparticles , chemical engineering , chemistry , composite material , electrode , physics , oceanography , quantum mechanics , geology , engineering , electrochemistry
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.