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High-order elastic multipoles as colloidal atoms | | Bohdan Senyuk
; Jure Aplinc
; Miha Ravnik
; Ivan I. Smalyukh
; | | Date: |
9 Nov 2018 | | Abstract: | Achieving and exceeding the diversity of colloidal analogs of chemical
elements and molecules as building blocks of matter has been the central goal
and challenge of colloidal science ever since Einstein introduced the colloidal
atom paradigm. Recent significant advances have been achieved by exploiting the
powerful machinery of DNA hybridization to assemble colloidal particles, but
robust physical means of defining colloidal atoms and molecules remain limited.
Here we introduce the physical design principles that allow for defining high
leading-order elastic colloidal multipoles that emerge when particles with
controlled shapes and surface boundary conditions are introduced into a nematic
host fluid. Combination of experiments and numerical modeling of equilibrium
field configurations, with a subsequent spherical harmonic expansion, allows us
to systematically probe elastic multipole moments, bringing analogies with
electromagnetism and structure of outmost occupied shells of atomic orbitals.
We show that, at least in view of the symmetry of the "director wiggle" wave
functions, the diversity of elastic colloidal atoms can far exceed that of
known chemical elements. | | Source: | arXiv, 1811.3901 | | Services: | Forum | Review | PDF | Favorites | |
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