Magnetic Imaging of Cyanide‐Bridged Co‐ordination Nanoparticles Grafted on FIB‐Patterned Si Substrates |
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Authors: | Alberto Ghirri Andrea Candini Marco Evangelisti Gian Carlo Gazzadi Florence Volatron Benoit Fleury Laure Catala Christophe David Talal Mallah Marco Affronte |
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Affiliation: | 1. 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);2. CNR‐INFM National Research Center on nanoStructures and bioSystems at Surfaces (S3) via Campi 213/a, 41100 Modena (Italy);3. ICMMO‐Equipe Chimie Inorganique Université Paris‐Sud 91405 Orsay (France);4. Laboratoire de Photonique et de Nanostructures CNRS, route de Nozay 91460 Marcoussis (France) |
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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. |
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Keywords: | magnetic nanoparticles molecular magnets nanolithography scanning probe microscopy self‐assembled monolayers |
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