Aperiodic order coming of age: from inorganic materials to dynamic protein superstructures

Borgstahl, Gloria E. O.; Goldman, A. I.; Thiel, Patricia A.

doi:10.1107/s2053273319001165

Cited by 1 publication

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“…These results support the picture of a covalent-metallic bonding network extending through the structure of these approximant crystals as well as their related QCs phases, ultimately leading to a relatively-weak structure of rigid cluster aggregates. Indeed, the physical role of chemically-stable atomic clusters in the QC's architecture has been recently supported by detailed studies on the solidification dynamics of d-QCs and related approximants in the Al-Co-Ni alloy system, showing that the growth of the solid phases proceeds via attachment of relatively-large atomic clusters from the liquid, rather than by the direct assembly of individual atoms from the melt [104,105].…”

Section: Discussionmentioning

confidence: 98%

Chemical Bonding and Physical Properties in Quasicrystals and Their Related Approximant Phases: Known Facts and Current Perspectives

Barber

2019

Applied Sciences

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Quasicrystals are a class of ordered solids made of typical metallic atoms but they do not exhibit the physical properties that usually signal the presence of metallic bonding, and their electrical and thermal transport properties resemble a more semiconductor-like than metallic character. In this paper I first review a number of experimental results and numerical simulations suggesting that the origin of the unusual properties of these compounds can be traced back to two main features. For one thing, we have the formation of covalent bonds among certain atoms grouped into clusters at a local scale. Thus, the nature of chemical bonding among certain constituent atoms should play a significant role in the onset of non-metallic physical properties of quasicrystals bearing transition-metal elements. On the other hand, the self-similar symmetry of the underlying structure gives rise to the presence of an extended chemical bonding network due to a hierarchical nesting of clusters. This novel structural design leads to the existence of quite diverse wave functions, whose transmission characteristics range from extended to almost localized ones. Finally, the potential of quasicrystals as thermoelectric materials is discussed on the basis of their specific transport properties.

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Section: Discussionmentioning

confidence: 98%

Chemical Bonding and Physical Properties in Quasicrystals and Their Related Approximant Phases: Known Facts and Current Perspectives

Barber

2019

Applied Sciences

View full text Add to dashboard Cite

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Aperiodic order coming of age: from inorganic materials to dynamic protein superstructures

Abstract: A collection of articles from presentations at the Aperiodic 2018 conference is introduced.

Cited by 1 publication

References 13 publications

Chemical Bonding and Physical Properties in Quasicrystals and Their Related Approximant Phases: Known Facts and Current Perspectives

Chemical Bonding and Physical Properties in Quasicrystals and Their Related Approximant Phases: Known Facts and Current Perspectives

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