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Automating Blueprints for the Assembly of Colloidal Quasicrystal Clusters.
ACS Nano
January 2025
Dipartimento di Fisica, Sapienza Università di Roma, P. le Aldo Moro 5, 00185 Rome, Italy.
One of the frontiers of nanotechnology is advancing beyond the periodic self-assembly of materials. Icosahedral quasicrystals, aperiodic in all directions, represent one of the most challenging targets that has yet to be experimentally realized at the colloidal scale. Previous attempts have required meticulous human-designed building blocks and often resulted in interactions beyond the current experimental capabilities.
View Article and Find Full Text PDFComprehensive experimental datasets of quasicrystals and their approximants.
Sci Data
November 2024
National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0047, Japan.
Quasicrystals are solid-state materials that typically exhibit unique symmetries, such as icosahedral or decagonal diffraction symmetry. They were first discovered in 1984. Over the past four decades of quasicrystal research, around 100 stable quasicrystals have been discovered.
View Article and Find Full Text PDFSingular Continuous and Nonreciprocal Phonons in Quasicrystal AlPdMn.
Phys Rev Lett
September 2024
Institute of Industrial Science, The University of Tokyo, Tokyo, Japan.
In quasicrystals lacking translational symmetry but having highly ordered structures, understanding how phonons propagate in their aperiodic lattices remains an unsolved issue. We present an inelastic neutron scattering study on acoustic phonon modes of icosahedral quasicrystal AlPdMn, revealing hierarchical pseudo-gap structure in low-energy acoustic modes. Additionally, phonon intensities are asymmetric in energy and wave vectors with respect to the Bragg peak, indicating characteristic nonreciprocal phonon propagation in quasicrystals.
View Article and Find Full Text PDFQuasicrystal synthesis by shock compression.
Commun Chem
October 2024
Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Firenze, Italy.
Article Synopsis
- * Shock recovery experiments replicate the extreme conditions (high pressure, high temperature) and rapid processes necessary to study quasicrystal formation, but current results show these lab-synthesized quasicrystals differ significantly from their stable forms created at lower pressures.
- * Previous studies highlight the complexity of shock experiments, revealing both potential and challenges in understanding quasicrystals, and the authors suggest future research should focus on refining shock conditions to better analyze their properties.
Structure of face-centred icosahedral quasicrystals with cluster close packing.
Acta Crystallogr A Found Adv
November 2024
National Institute for Materials Science, Tsukuba, Ibaraki, 305, Japan.
A 6D structure model for face-centred icosahedral quasicrystals consisting of so-called pseudo-Mackay and mini-Bergman-type atomic clusters is proposed based on the structure model of the AlPdCrFe 3/2 cubic approximant crystal (with space group Pa3, a = 40.5 Å) [Fujita et al. (2013).
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