Hysteresis enhancement on a hybrid Dy(iii) single molecule magnet/iron oxide nanoparticle system

Abstract

A novel hybrid NP-Dy12 system presents an enhancement of the magnetization hysteresis with respect to the isolated components while retaining the morphological characteristics of the parent NPs.

Functionalized Trigonal Lanthanide Complexes: A New Family of 4f Single-Ion Magnets

“…Integration of SMMs and SIMs in QIP devices requires controlled surface deposition of the complexes . The readout of surface-deposited SIMs has been performed both on ensembles and at the single-molecule level. , Ln-based complexes have been studied on several surfaces such as graphite, graphene, , carbon nanotubes, silicon, gold, and metal oxides . The majority of these studies have been performed on lanthanide phthalocyanine double-decker complexes.…”

“…46,47 Ln-based complexes have been studied on several surfaces such as graphite, 48 graphene, 45,49 carbon nanotubes, 46 silicon, 50 gold, 51 and metal oxides. 52 The majority of these studies have been performed on lanthanide phthalocyanine double-decker complexes.…”

Heterometallic Co–Dy SMMs grafted on iron oxide nanoparticles

“…Carbon based materials can also offer a good surface for molecule deposition. 39 With the aim to study the magnetic interaction between a magnetic surface and a complex molecule like our SMM 1 we chose a simple system, that we had already used: iron oxide nanoparticles (NP) as the magnetic surface 29,40,41 and complex 1 as SMM. The use of iron oxide NP as magnetic surface allows for facile preparation of the hybrid system as well as for the separation and characterization taking advantage of the magnetic character of the NP at room temperature.…”

“…In particular, we have used a synthesis adapted from Bronsteins's group 19 that affords iron oxide NP with a SAM of oleate and with sizes between The decoration of NP with complex 1 was performed using a very mild method developed in our group. 29,40,41 The NP were magnetically separated and dried. The material was then re-dispersed in 7 mL CHCl 3 with 1% MeOH and mixed with 2 mg of complex 1.…”

“…28 We already showed how such nano-objects can be prepared using either dopamine or SAM of oleate as bufferlayer between the NP and SMM. [29][30][31] Gold NP have been decorated with SMMs: the coordination bond between the NP surface and the SMM affects the magnetization relaxation properties of the SMM 32,33 showing the necessity to have an intermediate layer between SMM and surface. Similar results were reported Sessoli and co-workers, that observed a change in the relaxation dynamics of Fe 4 SMMs grafted onto Au NP.…”