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[Fizinfo] BME Elméleti Fizika Tanszék szemináriuma

Chronological Thread 
  • From: tcsaba <tcsaba AT>
  • To: fizinfo AT
  • Subject: [Fizinfo] BME Elméleti Fizika Tanszék szemináriuma
  • Date: Fri, 05 Apr 2019 12:07:17 +0200

M E G H Í V Ó - I N V I T A T I O N

Seminar Series of the Department of Theoretical Physics at the
Budapest University of Technology and Economics

Sándor Pekker
(Wigner Research Centre for Physics)

Exotic Fullerene-Cubane Materials: From
Rotor-Stator Cocrystals to Ultrahard Amorphous Solids

A Chineese research group found recently two new phases in our previously prepared fullerene-cubane system after a high-pressure treatment: (i) a crystalline material of amorphous constituents; and (ii) an extended amorphous solid, harder than diamond. Phase (i) has been addressed as a new type of partially disordered solids, but its microscopic structure has not been specified. The new materials complete the rich family of fullerene-cubane materials consisting of such exotic phases as recognition controlled cocrystals with rotor-stator dynamics, rotor-in-rotor materials and interpenetrating networks of percolating copolymers. In the first part of the talk I outline the general structural characteristics of fullerenes, which are responsible for the great variety of their solid state reactions and the propensity for the formation of disordered solid derivatives. Then I discuss the polymers and cocrystals of fullerenes stressing the role of static and dynamic disorder. I detail the rotor-stator properties and the thermal copolymerization of various fullerene-cubane cocrystals. Finally I suggest a preliminary molecular model for the structure of the recently found phase (i).

Időpont: 2019. április 12. péntek, 10:15
Helyszín: BME Fizikai Intézet, Elméleti Fizika Tanszék,
Budafoki út 8. F-épület, III lépcsőház, szemináriumi szoba

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