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DOE OSTI · 1240073

Hexadecapolar Colloids

Senyuk, Bohdan·Puls, Owen·Tovkach, Oleh M.·Chernyshuk, Stanislav B.·Smalyukh, Ivan I.
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Abstract

Outermost occupied electron shells of chemical elements can have symmetries resembling that of monopoles, dipoles, quadrupoles and octupoles corresponding to filled s-, p-, d- and forbitals. Theoretically, elements with hexadecapolar outer shells could also exist, but none of the known elements have filled g-orbitals. On the other hand, the research paradigm of ‘colloidal atoms’ displays complexity of particle behaviour exceeding that of atomic counterparts, which is driven by DNA functionalization, geometric shape and topology and weak external stimuli. We describe elastic hexadecapoles formed by polymer microspheres dispersed in a liquid crystal, a nematic fluid of orientationally ordered molecular rods. Because of conically degenerate boundary conditions, the solid microspheres locally perturb the alignment of the nematic host, inducing hexadecapolar distortions that drive anisotropic colloidal interactions. We uncover physical underpinnings of formation of colloidal elastic hexadecapoles and report the ensuing bonding inaccessible to elastic dipoles, quadrupoles and other nematic colloids studied previously.

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14 SOLAR ENERGY77 NANOSCIENCE AND NANOTECHNOLOGYbondingcolloidal elastic hexadecapoleselastic dipolesnematic colloidsquadrupoles

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Senyuk, Bohdan, Puls, Owen, Tovkach, Oleh M., Chernyshuk, Stanislav B., Smalyukh, Ivan I.. 2016-02-11. Hexadecapolar Colloids. https://doi.org/10.1038/ncomms10659

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