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Fabrication of Arrays of Topological Solitons in Patterned Chiral Liquid Crystals for Real-Time Observation of Morphogenesis

Journal Article · · Advanced Materials
 [1];  [2];  [3];  [2];  [2];  [4];  [2]
  1. Korea Advanced Institute Science and Technology (KAIST), Daejeon (Korea, Republic of); OSTI
  2. Korea Advanced Institute Science and Technology (KAIST), Daejeon (Korea, Republic of)
  3. University of Colorado, Boulder, CO (United States)
  4. University of Colorado, Boulder, CO (United States). Renewable and Sustainable Energy Institute (RSEI); University of Colorado, Boulder, CO (United States)

Topological solitons have knotted continuous field configurations embedded in a uniform background, and occur in cosmology, biology, and electromagnetism. However, real-time observation of their morphogenesis and dynamics is still challenging because their size and timescale are enormously large or tiny. Liquid crystal (LC) structures are promising candidates for a model-system to study the morphogenesis of topological solitons, enabling direct visualization due to the proper size and timescale. We report a new way is found to rationalize the real-time observation of the generation and transformation of topological solitons using cholesteric LCs confined in patterned substrates. The experimental demonstration shows the topologically protected structures arise via the transformation of topological defects. Numerical modeling based on minimization of free energy closely reconstructs the experimental findings. The fundamental insights obtained from the direct observations pose new theoretical challenges in understanding the morphogenesis of different types of topological solitons within a broad range of scales.

Research Organization:
University of Colorado, Boulder, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Research Foundation of Korea (NRF); National Science Foundation (NSF)
Grant/Contract Number:
SC0019293
OSTI ID:
1976215
Alternate ID(s):
OSTI ID: 2341940
OSTI ID: 1873587
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 29 Vol. 34; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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