Nobel Prize in Chemistry 2011: Dan Shechtman and The discovery of quasicrystals

Berger, Claire

Title:

Nobel Prize in Chemistry 2011: Dan Shechtman and The discovery of quasicrystals

dc.contributor.author	Berger, Claire	en_US
dc.contributor.corporatename	Georgia Institute of Technology. School of Physics	en_US
dc.date.accessioned	2012-01-17T17:04:15Z
dc.date.available	2012-01-17T17:04:15Z
dc.date.issued	2012-01-09
dc.description	Presented on January 9, 2012 from 3:00 pm to 4:00 pm in Room 1116 of the Marcus Nanotechnology building.	en_US
dc.description	Runtime: 59:30 minutes	en_US
dc.description.abstract	The Nobel prize in Chemistry 2011 was awarded to Dan Shechtman for his “Discovery of Quasicrystals”. This discovery published in a seminal paper in November 1984 [1] lead to the re-definition of crystalline structures. What Shechtman has observed is a long-range icosahedral symmetry in an aluminum –based alloy. Five-fold symmetry is in clear violation of periodic order, which was the paramount dogma of crystallography. To reconcile a discrete diffraction diagram and forbidden symmetry has required, not without resistance from the community, to reconsider what was known for centuries about crystalline order and to realize that what Shechtman had observed was a new type of atomic structure, which is non periodic yet perfectly ordered. Quasicrystals of various symmetries have been now observed in a number of compounds, man-made and natural. Quasicrystals is a new cross-disciplinary field of study, reaching to chemistry, physics and mathematics. I will mainly discuss the structure of quasicrystals, the aesthetics of their order based on the golden mean. I will touch upon fundamental questions like what becomes of properties, for instance electronic transport, for quasiperiodic rather than the usual periodic ordered structures. [1] Dan Shechtman, I. Blech, D. Gratias, J. Cahn, Phys. Rev. Lett. 53, 1951 (1984).	en_US
dc.format.extent	59:30 minutes
dc.identifier.uri	http://hdl.handle.net/1853/42179
dc.language.iso	en_US	en_US
dc.publisher	Georgia Institute of Technology	en_US
dc.relation.ispartofseries	Physics Colloquium
dc.subject	Nobel prize in Chemistry 2011	en_US
dc.subject	Quasicrystals	en_US
dc.title	Nobel Prize in Chemistry 2011: Dan Shechtman and The discovery of quasicrystals	en_US
dc.type	Moving Image
dc.type.genre	Lecture
dspace.entity.type	Publication
local.contributor.corporatename	College of Sciences
local.contributor.corporatename	School of Physics
local.relation.ispartofseries	Physics Colloquium
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