Shape-tuning the colloidal assemblies in nematic liquid crystals
Colloidal platelets are natural building blocks for the shape-controlled assembly of two-dimensional periodic lattices and can form versatile optical elements. Using three-dimensional (3D) numerical modelling, we demonstrate the self-assembly of triangular, square and pentagonal sub-micrometer sized...
| Những tác giả chính: | , , |
|---|---|
| Định dạng: | Journal article |
| Ngôn ngữ: | English |
| Được phát hành: |
2012
|
| _version_ | 1826268762593034240 |
|---|---|
| author | Dontabhaktuni, J Ravnik, M Zumer, S |
| author_facet | Dontabhaktuni, J Ravnik, M Zumer, S |
| author_sort | Dontabhaktuni, J |
| collection | OXFORD |
| description | Colloidal platelets are natural building blocks for the shape-controlled assembly of two-dimensional periodic lattices and can form versatile optical elements. Using three-dimensional (3D) numerical modelling, we demonstrate the self-assembly of triangular, square and pentagonal sub-micrometer sized platelets in a thin layer of nematic liquid crystal. Torques acting on individual platelets are calculated, showing that platelets with quadrupolar symmetry (squares, hexagons, etc) are, orientationally, more strongly bound than platelets with dipolar symmetry (triangles, pentagons) which is important for switching applications. Inter-platelet potentials are shown to depend in a complex way on the orientations of the platelets, exhibiting easy and hard reorientation axes and multiple minima. Linear chains of elastic dipoles form into two-dimensional periodic lattices via interesting rotational and translational shifts, to minimize the distortions in the surrounding nematic medium. © 2012 The Royal Society of Chemistry. |
| first_indexed | 2024-03-06T21:14:34Z |
| format | Journal article |
| id | oxford-uuid:3f542f15-19f9-4df2-96b4-ff6de7045751 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:14:34Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:3f542f15-19f9-4df2-96b4-ff6de70457512022-03-26T14:31:19ZShape-tuning the colloidal assemblies in nematic liquid crystalsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:3f542f15-19f9-4df2-96b4-ff6de7045751EnglishSymplectic Elements at Oxford2012Dontabhaktuni, JRavnik, MZumer, SColloidal platelets are natural building blocks for the shape-controlled assembly of two-dimensional periodic lattices and can form versatile optical elements. Using three-dimensional (3D) numerical modelling, we demonstrate the self-assembly of triangular, square and pentagonal sub-micrometer sized platelets in a thin layer of nematic liquid crystal. Torques acting on individual platelets are calculated, showing that platelets with quadrupolar symmetry (squares, hexagons, etc) are, orientationally, more strongly bound than platelets with dipolar symmetry (triangles, pentagons) which is important for switching applications. Inter-platelet potentials are shown to depend in a complex way on the orientations of the platelets, exhibiting easy and hard reorientation axes and multiple minima. Linear chains of elastic dipoles form into two-dimensional periodic lattices via interesting rotational and translational shifts, to minimize the distortions in the surrounding nematic medium. © 2012 The Royal Society of Chemistry. |
| spellingShingle | Dontabhaktuni, J Ravnik, M Zumer, S Shape-tuning the colloidal assemblies in nematic liquid crystals |
| title | Shape-tuning the colloidal assemblies in nematic liquid crystals |
| title_full | Shape-tuning the colloidal assemblies in nematic liquid crystals |
| title_fullStr | Shape-tuning the colloidal assemblies in nematic liquid crystals |
| title_full_unstemmed | Shape-tuning the colloidal assemblies in nematic liquid crystals |
| title_short | Shape-tuning the colloidal assemblies in nematic liquid crystals |
| title_sort | shape tuning the colloidal assemblies in nematic liquid crystals |
| work_keys_str_mv | AT dontabhaktunij shapetuningthecolloidalassembliesinnematicliquidcrystals AT ravnikm shapetuningthecolloidalassembliesinnematicliquidcrystals AT zumers shapetuningthecolloidalassembliesinnematicliquidcrystals |