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Observation of the Chiral and Achiral Hexatic Phases of Self-assembled Micellar polymers

Pal, Antara LU ; Kamal, Md Arif and Raghunathan, V. A. (2016) In Scientific Reports 6.
Abstract

We report the discovery of a thermodynamically stable line hexatic (N + 6) phase in a three-dimensional (3D) system made up of self-assembled polymer-like micelles of amphiphilic molecules. The experimentally observed phase transition sequence nematic (N)⇌N + 6⇌two-dimensional hexagonal (2D-H) is in good agreement with the theoretical predictions. Further, the present study also brings to light the effect of chirality on the N + 6 phase. In the chiral N + 6 phase the bond-orientational order within each "polymer" bundle is found to be twisted about an axis parallel to the average polymer direction. This structure is consistent with the theoretically envisaged Moiré state, thereby providing the first experimental demonstration of the... (More)

We report the discovery of a thermodynamically stable line hexatic (N + 6) phase in a three-dimensional (3D) system made up of self-assembled polymer-like micelles of amphiphilic molecules. The experimentally observed phase transition sequence nematic (N)⇌N + 6⇌two-dimensional hexagonal (2D-H) is in good agreement with the theoretical predictions. Further, the present study also brings to light the effect of chirality on the N + 6 phase. In the chiral N + 6 phase the bond-orientational order within each "polymer" bundle is found to be twisted about an axis parallel to the average polymer direction. This structure is consistent with the theoretically envisaged Moiré state, thereby providing the first experimental demonstration of the Moiré structure. In addition to confirming the predictions of fundamental theories of two-dimensional melting, these results are relevant in a variety of situations in chemistry, physics and biology, where parallel packing of polymer-like objects are encountered.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Scientific Reports
volume
6
publisher
Nature Publishing Group
external identifiers
  • scopus:84984985063
  • wos:000382240100002
ISSN
2045-2322
DOI
10.1038/srep32313
language
English
LU publication?
yes
id
dd9a7a64-d02e-4e40-a733-a2ccdb8bf7a5
date added to LUP
2016-11-29 15:42:32
date last changed
2017-07-30 05:18:04
@article{dd9a7a64-d02e-4e40-a733-a2ccdb8bf7a5,
  abstract     = {<p>We report the discovery of a thermodynamically stable line hexatic (N + 6) phase in a three-dimensional (3D) system made up of self-assembled polymer-like micelles of amphiphilic molecules. The experimentally observed phase transition sequence nematic (N)⇌N + 6⇌two-dimensional hexagonal (2D-H) is in good agreement with the theoretical predictions. Further, the present study also brings to light the effect of chirality on the N + 6 phase. In the chiral N + 6 phase the bond-orientational order within each "polymer" bundle is found to be twisted about an axis parallel to the average polymer direction. This structure is consistent with the theoretically envisaged Moiré state, thereby providing the first experimental demonstration of the Moiré structure. In addition to confirming the predictions of fundamental theories of two-dimensional melting, these results are relevant in a variety of situations in chemistry, physics and biology, where parallel packing of polymer-like objects are encountered.</p>},
  articleno    = {32313},
  author       = {Pal, Antara and Kamal, Md Arif and Raghunathan, V. A.},
  issn         = {2045-2322},
  language     = {eng},
  month        = {08},
  publisher    = {Nature Publishing Group},
  series       = {Scientific Reports},
  title        = {Observation of the Chiral and Achiral Hexatic Phases of Self-assembled Micellar polymers},
  url          = {http://dx.doi.org/10.1038/srep32313},
  volume       = {6},
  year         = {2016},
}