Atomically precise inorganic helices with a programmable irrational twist.

Autor: Cordova DLM; Department of Chemistry, University of California Irvine, Irvine, CA, USA., Chua K; Department of Chemistry, University of California Irvine, Irvine, CA, USA., Kerr TA; Department of Chemistry, University of California Irvine, Irvine, CA, USA., Aoki T; Irvine Materials Research Institute, University of California Irvine, Irvine, CA, USA., Knez D; Department of Chemistry, University of California Irvine, Irvine, CA, USA., Skorupskii G; Department of Chemistry, Princeton University, Princeton, NJ, USA., Lopez D; Department of Chemistry, University of California Irvine, Irvine, CA, USA., Ziller J; Department of Chemistry, University of California Irvine, Irvine, CA, USA., Fishman DA; Department of Chemistry, University of California Irvine, Irvine, CA, USA., Arguilla MQ; Department of Chemistry, University of California Irvine, Irvine, CA, USA. marguill@uci.edu.
Jazyk: angličtina
Zdroj: Nature materials [Nat Mater] 2024 Oct; Vol. 23 (10), pp. 1347-1354. Date of Electronic Publication: 2024 Jul 26.
DOI: 10.1038/s41563-024-01963-4
Abstrakt: Helicity in solids often arises from the precise ordering of cooperative intra- and intermolecular interactions unique to natural, organic or molecular systems. This exclusivity limited the realization of helicity and its ensuing properties in dense inorganic solids. Here we report that Ga atoms in GaSeI, a representative III-VI-VII one-dimensional (1D) van der Waals crystal, manifest the rare Boerdijk-Coxeter helix motif. This motif is a non-repeating geometric pattern characterized by 1D face-sharing tetrahedra whose adjacent vertices are rotated by an irrational angle. Using InSeI and GaSeI, we show that the modularity of 1D van der Waals lattices accommodates the systematic twisting of a periodic tetrahelix with a 4 1 screw axis in InSeI to an infinitely extending Boerdijk-Coxeter helix in GaSeI. GaSeI crystals are non-centrosymmetric, optically active and exfoliable to a single chain. These results present a materials platform towards understanding the origin and physical manifestation of aperiodic helicity in low-dimensional solids.
(© 2024. The Author(s), under exclusive licence to Springer Nature Limited.)
Databáze: MEDLINE
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