SANS study of new magnetic nanocomposites embedded into the mesoporous silica

Kel'berg, E. A.; Grigoriev, S. V.; Okorokov, A. I.; Eckerlebe, H.; Grigorieva, N.A.; Kraan, W.H.; Eliseev, A. A.; Lukashin, A. V.; Vertegel, Alexey; Napolskii, K. S.

doi:10.1016/s0921-4526(03)00221-7

Cited by 6 publications

(2 citation statements)

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“…Les premières expériences de diffusion des neutrons ont été réalisées pour évaluer l'influence des conditions de pré-paration sur les proprietés magnétiques et structurales de ces nanofils [11] (Figure 1(d)). A partir des expériences de neutrons on peut obtenir des informations sur l'influence des paramètres d'anisotropie du métal magnétique liés aux cavités créées par ces nanoréacteurs que sont les structures nanoporeuses (zéolites, silice mésoporeuse, membranes d'alumine).…”

Section: Introductionunclassified

Techniques de diffusion des neutrons en incidence rasante pour les nanosciences

Lauter-Pasyuk

2007

Journées de la Neutronique

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Section: Introductionunclassified

Techniques de diffusion des neutrons en incidence rasante pour les nanosciences

Lauter-Pasyuk

2007

Journées de la Neutronique

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“…1,2,9,10,11,12,13 One dimensional systems typically require templates, thus bulk methods, such as droplet evaporation, are not possible. Recent studies of quasi-1D nanoparticle structures within cylindrical templates 4,5,14,15,16,17,18 primarily probed the end product and did not explicitly measure the evolution of the self-assembly process. In order to investigate the self assembly process itself within confined geometries, it is necessary to perform in-situ experiments with precise control of the solvent amount, analogous to controlled evaporation of macroscopic droplets of nanoparticles on flat surfaces.…”

Section: Introductionmentioning

confidence: 99%

Solvent mediated assembly of nanoparticles confined in mesoporous alumina

et al. 2006

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The controlled self-assembly of thiol stabilized gold nanocrystals in a mediating solvent and confined within mesoporous alumina was probed in situ with small angle x-ray scattering. The evolution of the self-assembly process was controlled reversibly via regulated changes in the amount of solvent condensed from an undersaturated vapor. Analysis indicated that the nanoparticles self-assembled into cylindrical monolayers within the porous template. Nanoparticle nearest-neighbor separation within the monolayer increased and the ordering decreased with the controlled addition of solvent. The process was reversible with the removal of solvent. Isotropic clusters of nanoparticles were also observed to form temporarily during desorption of the liquid solvent and disappeared upon complete removal of liquid. Measurements of the absorption and desorption of the solvent showed strong hysteresis upon thermal cycling. In addition, the capillary filling transition for the solvent in the nanoparticle-doped pores was shifted to larger chemical potential, relative to the liquid/vapor coexistence, by a factor of 4 as compared to the expected value for the same system without nanoparticles.

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