Multiple-scale structures: from Faraday waves to soft-matter quasicrystals

IUCrJ

Babadi, M.¹  Savitz, S.² 

[1] Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA;Condensed Matter Physics, California Institute of Technology, Pasadena, CA 91125, USA

关键词: QUASICRYSTALS;    SOFT MATTER;    PATTERN FORMATION;   

DOI  :  10.1107/S2052252518001161

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

For many years, quasicrystals were observed only as solid-state metallic alloys, yet current research is now actively exploring their formation in a variety of soft materials, including systems of macromolecules, nanoparticles and colloids. Much effort is being invested in understanding the thermodynamic properties of these soft-matter quasicrystals in order to predict and possibly control the structures that form, and hopefully to shed light on the broader yet unresolved general questions of quasicrystal formation and stability. Moreover, the ability to control the self-assembly of soft quasicrystals may contribute to the development of novel photonics or other applications based on self-assembled metamaterials. Here a path is followed, leading to quantitative stability predictions, that starts with a model developed two decades ago to treat the formation of multiple-scale quasiperiodic Faraday waves (standing wave patterns in vibrating fluid surfaces) and which was later mapped onto systems of soft particles, interacting via multiple-scale pair potentials. The article reviews, and substantially expands, the quantitative predictions of these models, while correcting a few discrepancies in earlier calculations, and presents new analytical methods for treating the models. In so doing, a number of new stable quasicrystalline structures are found with octagonal, octadecagonal and higher-order symmetries, some of which may, it is hoped, be observed in future experiments.

【 授权许可】

CC BY