Interactions Between Topological Defects and Nanoparticles

Autor: Syou-P'heng Do, Amine Missaoui, Alessandro Coati, Andrea Resta, Nicolas Goubet, Sébastien Royer, Geraldine Guida, Emrick Briand, Emmanuel Lhuillier, Yves Garreau, David Babonneau, Michel Goldmann, Doru Constantin, Bernard Croset, Bruno Gallas, Emmanuelle Lacaze

Publikováno v: Frontiers in Physics, Vol 7 (2020)

Liquid Crystal (LC) topological defects have been shown to trap nanoparticles (NPs) in the defect cores. The LC topological defects may thus be used as a matrix for new kinds of NP organizations templated by the defect geometry. We here study composi

Externí odkaz: https://doaj.org/article/73788adf4a764333abbe2110d2688213

Annihilation of point defect pairs in freely suspended liquid-crystal films

Autor: Amine Missaoui, Kirsten Harth, Peter Salamon, Ralf Stannarius

Publikováno v: Physical Review Research, Vol 2, Iss 1, p 013080 (2020)

We study the annihilation of topological defect pairs in the quasi-two-dimensional geometry of freely suspended smectic films. This elementary process is at the basis of all models describing the statistics of complex defect patterns. We prepare pair

Externí odkaz: https://doaj.org/article/078e56d8ef6f4400a23ec439dd8b3098

Energetics of topographically designed Smectic-A oily streaks

Autor: Amine Missaoui, Adam L. Susser, Hillel Aharoni, Charles Rosenblatt

Publikováno v: Soft Matter. 19:3733-3738

(a) 3D visualization of a SmA divot measured by optical profilometry. (b) Polarized optical microscopy image showing the OS pattern between crossed polarizers, overlaid by the parameters used in our model. (c) Side view sketch showing the different p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f41c6c71cc8ef004e220eddc161f6601
https://doi.org/10.1039/d3sm00306j

Magnetic field-induced Freedericksz transition in a chiral liquid crystal

Autor: Amine Missaoui, Adam L. Susser, Hillel Aharoni, Charles Rosenblatt

Publikováno v: Applied Physics Letters. 122:134101

A wedge cell made of homeotropically treated glass plates is filled with a chirally doped nematic liquid crystal. When a sufficiently large magnetic field is applied in the cell plane, a bend-like distortion occurs above a Fréedericksz threshold fie

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::748d50b73e787ca1ca10c7ad255f205b
https://doi.org/10.1063/5.0146506

From Chains to Monolayers : Nanoparticle Assembly Driven by Smectic Topological Defects

Autor: Doru Constantin, David Babonneau, Arnaud Choux, Yves Garreau, Alessandro Coati, Syou-P. 'heng Do, Delphine Coursault, Michel Goldmann, Michal Wojcik, Emmanuelle Lacaze, Amine Missaoui, Jean Louis Gallani, Brigitte Pansu, Haifa Jeridi, Bernard Croset, Nicolas Goubet, Sébastien Royer, Bruno Gallas, Emrick Briand, Bertrand Donnio, Emmanuel Lhuillier, Andrea Resta

Publikováno v: Nano Letters
Nano Letters, 2020, 20 (3), pp.1598-1606. ⟨10.1021/acs.nanolett.9b04347⟩
Nano Letters, American Chemical Society, 2020, ⟨10.1021/acs.nanolett.9b04347⟩
Nano Letters, American Chemical Society, 2020, 20 (3), pp.1598-1606. ⟨10.1021/acs.nanolett.9b04347⟩

International audience; 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 o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f593e1f6223eacf0a80be0325ea08aac
https://hal.science/hal-02450544/document