Literature DB >> 31527259

Vapor deposition of a nonmesogen prepares highly structured organic glasses.

Camille Bishop1, Jacob L Thelen2, Eliot Gann2, Michael F Toney3, Lian Yu4,5, Dean M DeLongchamp2, M D Ediger4.   

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.

Keywords:  liquid crystals; organic glasses; physical vapor deposition

Year:  2019        PMID: 31527259      PMCID: PMC6815165          DOI: 10.1073/pnas.1908445116

Source DB:  PubMed          Journal:  Proc Natl Acad Sci U S A        ISSN: 0027-8424            Impact factor:   11.205


  29 in total

1.  Surface layering in liquid gallium: An X-ray reflectivity study.

Authors: 
Journal:  Phys Rev Lett       Date:  1995-09-25       Impact factor: 9.161

2.  Vapor deposition of a smectic liquid crystal: highly anisotropic, homogeneous glasses with tunable molecular orientation.

Authors:  Jaritza Gómez; Jing Jiang; Ankit Gujral; Chengbin Huang; Lian Yu; M D Ediger
Journal:  Soft Matter       Date:  2016-03-21       Impact factor: 3.679

3.  Order induced charge carrier mobility enhancement in columnar liquid crystal diodes.

Authors:  Juliana Eccher; Gregório C Faria; Harald Bock; Heinz von Seggern; Ivan H Bechtold
Journal:  ACS Appl Mater Interfaces       Date:  2013-11-05       Impact factor: 9.229

4.  Smectic layering at the free surface of liquid crystals in the nematic phase: X-ray reflectivity.

Authors: 
Journal:  Phys Rev A Gen Phys       Date:  1987-06-01

5.  Substrate temperature controls molecular orientation in two-component vapor-deposited glasses.

Authors:  J Jiang; D M Walters; D Zhou; M D Ediger
Journal:  Soft Matter       Date:  2016-02-29       Impact factor: 3.679

6.  Molecular dynamics of the supercooled pharmaceutical agent posaconazole studied via differential scanning calorimetry and dielectric and mechanical spectroscopies.

Authors:  K Adrjanowicz; K Kaminski; P Wlodarczyk; K Grzybowska; M Tarnacka; D Zakowiecki; G Garbacz; M Paluch; S Jurga
Journal:  Mol Pharm       Date:  2013-09-25       Impact factor: 4.939

7.  Origin of Anisotropic Molecular Packing in Vapor-Deposited Alq3 Glasses.

Authors:  Kushal Bagchi; Nicholas E Jackson; Ankit Gujral; Chengbin Huang; Michael F Toney; Lian Yu; Juan J de Pablo; M D Ediger
Journal:  J Phys Chem Lett       Date:  2018-12-31       Impact factor: 6.475

8.  Birefringent Stable Glass with Predominantly Isotropic Molecular Orientation.

Authors:  Tianyi Liu; Annemarie L Exarhos; Ethan C Alguire; Feng Gao; Elmira Salami-Ranjbaran; Kevin Cheng; Tiezheng Jia; Joseph E Subotnik; Patrick J Walsh; James M Kikkawa; Zahra Fakhraai
Journal:  Phys Rev Lett       Date:  2017-08-31       Impact factor: 9.161

9.  Dynamics of glass-forming liquids. XVI. Observation of ultrastable glass transformation via dielectric spectroscopy.

Authors:  Z Chen; A Sepúlveda; M D Ediger; R Richert
Journal:  J Chem Phys       Date:  2013-03-28       Impact factor: 3.488

10.  Using deposition rate to increase the thermal and kinetic stability of vapor-deposited hole transport layer glasses via a simple sublimation apparatus.

Authors:  Kenneth L Kearns; Paige Krzyskowski; Zachary Devereaux
Journal:  J Chem Phys       Date:  2017-05-28       Impact factor: 3.488

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  2 in total

1.  Orientationally ordered glasses via controlled deposition.

Authors:  Peter Harrowell
Journal:  Proc Natl Acad Sci U S A       Date:  2019-10-02       Impact factor: 11.205

2.  Atomic structure of a glass imaged at last.

Authors:  Paul Voyles
Journal:  Nature       Date:  2021-04       Impact factor: 49.962

  2 in total

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