SZFI Hírek

New Ordered Structure of Amorphous Carbon Clusters Induced by Fullerene–Cubane Reactions

Mingrun Du, Mingguang Yao, JiaJun Dong, Peng Ge, Qing Dong, Éva Kováts, Sándor Pekker, Shuanglong Chen, Ran Liu, Bo Liu, Tian Cui, Bertil Sundqvist, and Bingbing Liu
Advanced Materials Volume30, Issue22 1706916–1-7

Ordered Amorphous Carbon
Ordered Amorphous Carbon

As a new category of solids, crystalline materials constructed with amorphous building blocks expand the structure categorization of solids, for which designing such new structures and understanding the corresponding formation mechanisms are fundamentally important. Unlike previous reports, new amorphous carbon clusters constructed ordered carbon phases are found here by compressing C8H8/C60 cocrystals, in which the highly energetic cubane (C8H8) exhibits unusual roles as to the structure formation and transformations under pressure. The significant role of C8H8 is to stabilize the boundary interactions of the highly compressed or collapsed C60 clusters which preserves their long‐range ordered arrangement up to 45 GPa. With increasing time at high pressure, the gradual random bonding between C8H8 and carbon clusters, due to “energy release” of highly compressed cubane, leads to the loss of the ability of C8H8 to stabilize the carbon cluster arrangement. Thus a transition from short‐range disorder to long‐range disorder (amorphization) occurs in the formed material. The spontaneous bonding reconstruction most likely results in a 3D network in the material, which can create ring cracks on diamond anvils.

További információ:

Beküldte: Kováts Éva, 2018. 06. 01. 07.51,   Hír típusa: Cikk,   Megtekintve: 241 alkalommal