From Chains to Monolayers : Nanoparticle Assembly Driven by Smectic Topological Defects
GOUBET, Nicolas
De la Molécule aux Nanos-objets : Réactivité, Interactions et Spectroscopies [MONARIS]
De la Molécule aux Nanos-objets : Réactivité, Interactions et Spectroscopies [MONARIS]
BRIAND, Emrik
Couches nanométriques : formation, interfaces, défauts [INSP-E5]
SAFIR - Système d'Analyse par Faisceaux d'Ions Rapides
Institut des Nanosciences de Paris [INSP]
Sorbonne Université [SU]
< Leer menos
Couches nanométriques : formation, interfaces, défauts [INSP-E5]
SAFIR - Système d'Analyse par Faisceaux d'Ions Rapides
Institut des Nanosciences de Paris [INSP]
Sorbonne Université [SU]
Idioma
en
Article de revue
Este ítem está publicado en
Nano Letters. 2020-01-17, vol. 20, n° 3, p. 1598-1606
American Chemical Society
Resumen en inglés
In this article, we show how advanced hierarchical structures of topological defects in the so-called smectic oily streaks can be used to sequentially transfer their geometrical features to gold nanospheres. We use two ...Leer más >
In this article, we show how advanced hierarchical structures of topological defects in the so-called smectic oily streaks can be used to sequentially transfer their geometrical features to gold nanospheres. We use two kinds of topological defects, 1D dislocations and 2D ribbon-like topological defects. The large trapping efficiency of the smectic dislocation cores not only surpasses that of the elastically distorted zones around the cores but also the one of the 2D ribbon-like topological defect. This enables the formation of a large number of aligned NP chains, within the dislocation cores that can be quasi-fully filled without any significant aggregation outside the cores. When the NP concentration is large enough to entirely fill the dislocation cores, the LC confinement varies from 1D to 2D. We demonstrate that the 2D topological defect cores induce a confinement that leads to planar hexagonal networks of NPs. We then draw the phase diagram driven by NP concentration, associated with the sequential confinements induced by these two kinds of topological defects. Owing to the excellent large-scale order of these defect cores, not only the NP chains but also the NP hexagonal networks can be oriented along the desired direction, suggesting a possible new route for the creation of either 1D or 2D highly anisotropic NP networks. In addition, these results open rich perspectives based on the possible creation of coexisting NP assemblies of different kinds, localized in different confining areas of a same smectic film that would thus interact thanks to their proximity but also would interact via the surrounding soft matter matrix.< Leer menos
Palabras clave en inglés
Smectic
Topological defects
Oily streaks
Nanoparticles
Gold
X-ray
Dislocations
Assembly
Proyecto ANR
MATerials, InterfaceS, Surfaces, Environment - ANR-10-LABX-0067
Orígen
Importado de HalCentros de investigación