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Title: Vapor deposition of a nonmesogen prepares highly structured organic glasses

Abstract

We show that glasses with aligned smectic liquid crystal-like order can be produced by physical vapor deposition of a molecule without any equilibrium liquid crystal phases. Smectic-like order in vapor-deposited films was characterized by wide-angle X-ray scattering. A surface equilibration mechanism predicts the highly smectic-like vapor-deposited structure to be a result of significant vertical anchoring at the surface of the equilibrium liquid, and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy orientation analysis confirms this prediction. Understanding of the mechanism enables informed engineering of different levels of smectic order in vapor-deposited glasses to suit various applications. The preparation of a glass with orientational and translational order from a nonliquid crystal opens up an exciting paradigm for accessing extreme anisotropy in glassy solids.

Authors:
ORCiD logo; ; ; ORCiD logo; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1566219
Grant/Contract Number:  
AC02-76SF00515
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: 116 Journal Issue: 43; Journal ID: ISSN 0027-8424
Publisher:
Proceedings of the National Academy of Sciences
Country of Publication:
United States
Language:
English

Citation Formats

Bishop, Camille, Thelen, Jacob L., Gann, Eliot, Toney, Michael F., Yu, Lian, DeLongchamp, Dean M., and Ediger, M. D. Vapor deposition of a nonmesogen prepares highly structured organic glasses. United States: N. p., 2019. Web. doi:10.1073/pnas.1908445116.
Bishop, Camille, Thelen, Jacob L., Gann, Eliot, Toney, Michael F., Yu, Lian, DeLongchamp, Dean M., & Ediger, M. D. Vapor deposition of a nonmesogen prepares highly structured organic glasses. United States. doi:10.1073/pnas.1908445116.
Bishop, Camille, Thelen, Jacob L., Gann, Eliot, Toney, Michael F., Yu, Lian, DeLongchamp, Dean M., and Ediger, M. D. Mon . "Vapor deposition of a nonmesogen prepares highly structured organic glasses". United States. doi:10.1073/pnas.1908445116.
@article{osti_1566219,
title = {Vapor deposition of a nonmesogen prepares highly structured organic glasses},
author = {Bishop, Camille and Thelen, Jacob L. and Gann, Eliot and Toney, Michael F. and Yu, Lian and DeLongchamp, Dean M. and Ediger, M. D.},
abstractNote = {We show that glasses with aligned smectic liquid crystal-like order can be produced by physical vapor deposition of a molecule without any equilibrium liquid crystal phases. Smectic-like order in vapor-deposited films was characterized by wide-angle X-ray scattering. A surface equilibration mechanism predicts the highly smectic-like vapor-deposited structure to be a result of significant vertical anchoring at the surface of the equilibrium liquid, and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy orientation analysis confirms this prediction. Understanding of the mechanism enables informed engineering of different levels of smectic order in vapor-deposited glasses to suit various applications. The preparation of a glass with orientational and translational order from a nonliquid crystal opens up an exciting paradigm for accessing extreme anisotropy in glassy solids.},
doi = {10.1073/pnas.1908445116},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 43,
volume = 116,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1073/pnas.1908445116

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Works referenced in this record:

Substrate temperature controls molecular orientation in two-component vapor-deposited glasses
journal, January 2016

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