Spin crossover in Fe(triazole)–Pt nanoparticle self-assembly structured at the sub-5 nm scale

Usmani, Suhail; Mikolasek, Mirko; Gillet, Angélique; Costa, José Sánchez; Rigoulet, Mathilde; Chaudret, Bruno; Bousseksou, Azzedine; Lassalle‐Kaiser, Benedikt; Demont, Phillipe; Molnár, Gábor; Salmon, Lionel; Carrey, Julian; Tricard, Simon

doi:10.1039/d0nr02154g

Cited by 10 publications

(8 citation statements)

References 60 publications

(59 reference statements)

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“…10 Furthermore, switching of the spin states can trigger additional changes in composite materials or heterostructures, such as conductivity. 11,12 This offers interesting applications, e.g. as sensors, 13 display devices and data storage, 14 contrast agents 15,16 or molecular actuators.…”

Section: Introductionmentioning

confidence: 99%

Realizing shape and size control for the synthesis of coordination polymer nanoparticles templated by diblock copolymer micelles

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Realizing shape and size control for the synthesis of coordination polymer nanoparticles templated by diblock copolymer micelles

et al. 2022

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“…In recent decades, metal nanoparticles have been the subject of scienti c and technical interest because of their attractive physical and chemical properties as compared to the macroscopic counterparts due to large surface area to volume ratios and active surface atoms. Among them, magnetic nanoparticles have drawn considerable attention in numerous areas such as high energy products [1], solar cells [2,3], spin electronics [4][5][6], catalysis [7][8][9], bio-sensing and biomedicine [10][11][12], etc. Since all these applications rely on their size and internal structure, knowledge of preparation and characterization of the magnetic nanoparticles with controllable size, shape, composition and crystalline structure is signi cantly crucial from the viewpoint of both fundamental research and industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Investigation of Structure Evolution and Thermodynamics of Ni-fe Nanoparticles During Inert Gas Condensation

Pan

Liu

et al. 2021

Preprint

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Synthesis of magnetic nanoparticles is relevant to many applications in the fields of catalysis, energy storage and biomedicine, etc. Understanding the growth mechanisms and morphology of nanoparticles during inert gas condensation is crucial to rationally improve the performance of the final nanoparticles. In this work, molecular dynamics simulations are carried out to study the structural and thermodynamic behavior of Ni-Fe nanoparticles from homogenous vapor phase in Ar atmosphere. It is revealed that the final morphology of the resulting nanoparticles presents a spherical shape by cluster coalescence at high temperatures where the small clusters are liquid droplets prior to their collisions. However, probabilistic nucleation and cluster growth indicate that the occurrence of spherical shape is more controlled by the probability limits for different Fe concentrations. Meanwhile, a larger inert gas density induces a more efficient cooling effect leading to a larger probability control of the cluster formation with non-spherical shape by agglomeration. Furthermore, the solidification of the as-formed Ni-Fe clusters is examined by evaluating the evolution of crystalline and amorphous structure. The linear scaling-down dependence of the solidification temperature on the reciprocal of the nanoparticle size clearly signifies a linear size-depression effect for the liquid-to-solid phase change of Ni-Fe nanoparticles. Our findings thus extend the current understanding of inert gas condensation behavior and mechanisms of Ni-Fe nanoparticles from an atomic/molecular perspective.

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“…Current spin‐crossover research is driven by the pursuit of such electronic devices at the nanoscale; hence a plethora of nanoparticles, thin films, liquid crystals and surface patterns of spin‐crossover materials have been described [19] . Of particular interest are highly‐ordered, self‐assembled nanostructures [2,20–22] . For example, metal complexes with long alkyl chains were shown to self‐assemble into structured multifunctional nanomaterials, [23–28] i. e ., materials in which several properties are combined, such as SCO and liquid crystal behavior [23,29–31] or magnetic exchange interactions, [32] as well as single‐molecule magnet (SMM) properties [33] .…”

Section: Introductionmentioning

confidence: 99%

Highly Ordered, Self‐Assembled Monolayers of a Spin‐Crossover Complex with In‐Plane Interactions

et al. 2021

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For the technological integration of molecular switches in electronic devices, self‐assembling nanomaterials of such switches are highly sought after. The syntheses of a new tetrapyridyl ligand bearing a C12 alkyl chain and two N−H bridges (compound 1) and of its iron(II) complex [Fe(1)(NCS)2] (compound 2), are described. Magnetic susceptibility data for bulk samples of 2 confirmed their gradual spin‐crossover properties. The self‐assembly of 1 and 2 on highly ordered pyrolytic graphite surfaces (HOPG) was investigated by Scanning Tunneling Microscopy (STM). Both compounds 1 and 2 formed ordered monolayers after deposition by drop casting. The patterns of the two compounds are very different, which is attributed to the fundamentally different hydrogen bonding networks before and after coordination of Fe(NCS)2 to the tetradentate chelate. Two possible models for the self‐assembly of 1 and 2 are provided. This work suggests that it is possible to design molecular switches that self‐assemble on surfaces in highly ordered monolayer films. This is a significant step in the development of spin‐switching materials, which may streamline the integration of molecular switches in for example memory and sensing devices.

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Spin crossover in Fe(triazole)–Pt nanoparticle self-assembly structured at the sub-5 nm scale

Abstract: Spin crossover is unambiguously demonstrated by magnetic and electrical measurements in ordered self-assemblies of ultra-small platinum nanoparticles with coordination polymers.

Cited by 10 publications

References 60 publications

Realizing shape and size control for the synthesis of coordination polymer nanoparticles templated by diblock copolymer micelles

Realizing shape and size control for the synthesis of coordination polymer nanoparticles templated by diblock copolymer micelles

Molecular Dynamics Investigation of Structure Evolution and Thermodynamics of Ni-fe Nanoparticles During Inert Gas Condensation

Highly Ordered, Self‐Assembled Monolayers of a Spin‐Crossover Complex with In‐Plane Interactions

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