Observation of a hexatic columnar liquid crystal of polydisperse colloidal disks.
We report the observation of a new type of columnar liquid crystal phase, which is formed by thin hard colloidal disks in a dense suspension. High-resolution small-angle x-ray diffraction reveals a combination of long-range bond-orientational order and short-range translational order between the columns, the hallmark of the hexatic phase. Our results imply that geometric frustration related to the size polydispersity of the particles destroys long-range translational order and therefore promotes the formation of this novel phase.
Petukhov
A V
AV
Van't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute, University of Utrecht, The Netherlands.
van der Beek
D
D
Dullens
R P A
RP
Dolbnya
I P
IP
Vroege
G J
GJ
Lekkerkerker
H N W
HN