Universität zu Köln

Haeberle, Jan, Harju, Janni ORCID: 0000-0001-9696-5453, Sperl, Matthias ORCID: 0000-0001-9525-0368 and Born, Philip (2019). Granular ionic crystals in a small nutshell. Soft Matter, 15 (36). S. 7179 - 7187. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1744-6848

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Abstract

Ordered two-dimensional arrangements of triboelectrically oppositely charged granular particles have been reported several times, but observations of bulk ordered binary granular particle packings are singular. We attribute this suppression of triboelectrically induced order to the concurrent behaviour of granular particles to pack densest due to gravity. We show that triboelectrically induced order robustly emerges in a container that does not allow for crystallization into a dense packing under gravity. It turns out that the triboelectrically ordered structure follows Pauling's predictions for atomic ionic crystals in many aspects, but also exhibits systematic deviations. We discuss how the emergence of order in an incommensurate container, the deviations from Pauling's predictions and the gravitational potential energy of the particles are connected.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Haeberle, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Harju, Janni UNSPECIFIED orcid.org/0000-0001-9696-5453 UNSPECIFIED Sperl, Matthias UNSPECIFIED orcid.org/0000-0001-9525-0368 UNSPECIFIED Born, Philip UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-133573
DOI:	10.1039/c9sm01272a
Journal or Publication Title:	Soft Matter
Volume:	15
Number:	36
Page Range:	S. 7179 - 7187
Date:	2019
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	1744-6848
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CRYSTALLIZATION; SPHERES; BEADS Multiple languages Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Multidisciplinary; Polymer Science Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13357