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Title: Mesoscale martensitic transformation in single crystals of topological defects

Abstract

Liquid-crystal blue phases (BPs) are highly ordered at two levels. Molecules exhibit orientational order at nanometer length scales, while chirality leads to ordered arrays of double-twisted cylinders over micrometer scales. Past studies of polycrystalline BPs were challenged by the existence of grain boundaries between randomly oriented crystalline nanodomains. Here, the nucleation of BPs is controlled with precision by relying on chemically nanopatterned surfaces, leading to macroscopic single-crystal BP specimens where the dynamics of mesocrystal formation can be directly observed. Theory and experiments show that transitions between two BPs having a different network structure proceed through local reorganization of the crystalline array, without diffusion of the double-twisted cylinders. In solid crystals, martensitic transformations between crystal structures involve the concerted motion of a few atoms, without diffusion. The transformation between BPs, where crystal features arise in the submicron regime, is found to be martensitic in nature when one considers the collective behavior of the double-twist cylinders. Single-crystal BPs are shown to offer fertile grounds for the study of directed crystal nucleation and the controlled growth of soft matter.

Authors:
ORCiD logo; ; ORCiD logo; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States). Center for Nanoscale Materials
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); Departamento Administrativo de Ciencia, Tecnología e Innovación; University of Chicago
OSTI Identifier:
1378780
Alternate Identifier(s):
OSTI ID: 1411052
Grant/Contract Number:  
AC02-06CH11357; DMR-1420709; 110-165- 843-748
Resource Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 114 Journal Issue: 38; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; chemical patterns; blue phase; chiral liquid crystals; martensitic transformation; self-assembly

Citation Formats

Li, Xiao, Martínez-González, José A., Hernández-Ortiz, Juan P., Ramírez-Hernández, Abelardo, Zhou, Ye, Sadati, Monirosadat, Zhang, Rui, Nealey, Paul F., and de Pablo, Juan J. Mesoscale martensitic transformation in single crystals of topological defects. United States: N. p., 2017. Web. doi:10.1073/pnas.1711207114.
Li, Xiao, Martínez-González, José A., Hernández-Ortiz, Juan P., Ramírez-Hernández, Abelardo, Zhou, Ye, Sadati, Monirosadat, Zhang, Rui, Nealey, Paul F., & de Pablo, Juan J. Mesoscale martensitic transformation in single crystals of topological defects. United States. doi:10.1073/pnas.1711207114.
Li, Xiao, Martínez-González, José A., Hernández-Ortiz, Juan P., Ramírez-Hernández, Abelardo, Zhou, Ye, Sadati, Monirosadat, Zhang, Rui, Nealey, Paul F., and de Pablo, Juan J. Tue . "Mesoscale martensitic transformation in single crystals of topological defects". United States. doi:10.1073/pnas.1711207114.
@article{osti_1378780,
title = {Mesoscale martensitic transformation in single crystals of topological defects},
author = {Li, Xiao and Martínez-González, José A. and Hernández-Ortiz, Juan P. and Ramírez-Hernández, Abelardo and Zhou, Ye and Sadati, Monirosadat and Zhang, Rui and Nealey, Paul F. and de Pablo, Juan J.},
abstractNote = {Liquid-crystal blue phases (BPs) are highly ordered at two levels. Molecules exhibit orientational order at nanometer length scales, while chirality leads to ordered arrays of double-twisted cylinders over micrometer scales. Past studies of polycrystalline BPs were challenged by the existence of grain boundaries between randomly oriented crystalline nanodomains. Here, the nucleation of BPs is controlled with precision by relying on chemically nanopatterned surfaces, leading to macroscopic single-crystal BP specimens where the dynamics of mesocrystal formation can be directly observed. Theory and experiments show that transitions between two BPs having a different network structure proceed through local reorganization of the crystalline array, without diffusion of the double-twisted cylinders. In solid crystals, martensitic transformations between crystal structures involve the concerted motion of a few atoms, without diffusion. The transformation between BPs, where crystal features arise in the submicron regime, is found to be martensitic in nature when one considers the collective behavior of the double-twist cylinders. Single-crystal BPs are shown to offer fertile grounds for the study of directed crystal nucleation and the controlled growth of soft matter.},
doi = {10.1073/pnas.1711207114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 38,
volume = 114,
place = {United States},
year = {2017},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1073/pnas.1711207114

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Cited by: 9 works
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