Results 1 to 10 of about 1,632 (118)

Metallic-mean quasicrystals as aperiodic approximants of periodic crystals [PDF]

Nature Communications, 2019
AbstractEver since the discovery of quasicrystals, periodic approximants of these aperiodic structures constitute a very useful experimental and theoretical device. Characterized by packing motifs typical for quasicrystals arranged in large unit cells, these approximants bridge the gap between periodic and aperiodic positional order.
Primoz Ziherl, Tomonari Dotera
exaly   +6 more sources

Unravelling friction anisotropy by atomic force microscopy. [PDF]

J Microsc
Abstract Friction plays a crucial role in both natural phenomena, from the flow of blood cells to earthquakes, and technological applications, from car engines to wind turbines. One of the most fundamental aspects of tribology is friction anisotropy, that is, the dependence of the friction force vector on the direction of sliding.
Cafolla C, Campione M.
europepmc   +2 more sources

Superior Performance and Catalytic Mechanism of an Icosahedral Quasicrystal Al-Cu-Fe in CO₂ Reduction to CO. [PDF]

ChemSusChem
Icosahedral quasicrystal Al63Cu25Fe12 (iQC) is employed as a high‐performance catalyst for CO2‐to‐CO conversion. The iQC exhibits superior CO2 conversion compared with its crystalline counterparts. Density functional theory calculations reveal that abundant icosahedral clusters within iQC effectively lower the reaction barrier, elucidating the origin ...
Jin H, Zhang W, Yoshikawa H, Ishikawa A, Labib F, Zhang B, Zhou J, Kang R, Qin J, Zhang J, Xu Y, Tamura R.   +11 more
europepmc   +2 more sources

Enhanced Deformability Through Distributed Buckling in Stiff Quasicrystalline Architected Materials. [PDF]

Adv Mater
Quasi‐periodic metamaterials combine stiffness and large‐strain deformability, overcoming limitations of traditional stretching‐dominated periodic designs that are prone to global buckling instabilities and catastrophic layer collapses. By leveraging non‐uniform force chains, they achieve high isotropic stiffness, stable deformation, and remarkable ...
Rosa MIN, Karapiperis K, Radi K, Pescialli E, Kochmann DM.   +4 more
europepmc   +2 more sources

Aperiodic approximants bridging quasicrystals and modulated structures [PDF]

Nature Communications
Toranosuke Matsubara, Akihisa Koga, Yushu Matsushita   +2 more
exaly   +2 more sources

Bandgap properties of low‐index contrast aperiodically ordered photonic quasicrystals [PDF]

Microwave and Optical Technology Letters, 2009
AbstractWe numerically analyze, using Finite Difference Time Domain simulations, the bandgap properties of photonic quasicrystals with a low‐index contrast. We compared 8‐, 10‐, and 12‐fold symmetry aperiodically ordered lattices with different spatial tiling.
G. Zito, T. Priya Rose, DI GENNARO, EMILIANO, ANDREONE, ANTONELLO, SANTAMATO, ENRICO, ABBATE, GIANCARLO   +5 more
openaire   +3 more sources

Area scalable and period manipulable three-dimensional optically induced photorefractive photonic periodic crystal or aperiodic quasicrystal

Superlattices and Microstructures, 2020
Abstract We experimentally investigate the formation of area-scalable three-dimensional (3D) photonic periodic crystal and aperiodic quasicrystal in an iron doped lithium niobate photorefractive material by multi-wedge prisms assisted compact and versatile single step optical induction approach.
Cheng Jiang, Yan Ling Xue, Rui Wang, Rongfa Kong   +3 more
openaire   +1 more source

Ted Janssen and aperiodic crystals [PDF]

Acta Crystallographica Section A: Foundations and Advances, 2019
de Boissieu M.
exaly   +2 more sources

What is a crystal? [PDF]

, 2007
Almost 25 years have passed since Shechtman discovered quasicrystals, and 15 years since the Commission on Aperiodic Crystals of the International Union of Crystallography put forth a provisional definition of the term crystal to mean ``any solid having ...
Baake M., de Bruijn N. G., Gardner M., Gähler F., Hargittai I., International Union, Levine D., Penrose R.   +7 more
core   +4 more sources

Localization-delocalization wavepacket transition in Pythagorean aperiodic potentials [PDF]

, 2016
We introduce a composite optical lattice created by two mutually rotated square patterns and allowing observation of continuous transformation between incommensurate and completely periodic structures upon variation of the rotation angle θ.
Chen, Xianfeng, Huang, Changming, Kartashov, Yaroslav V., Konotop, Vladimir V., Torner, Lluis, Ye, Fangwei   +5 more
core   +4 more sources