skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Extreme Elasticity Anisotropy in Molecular Glasses

Journal Article · · Advanced Functional Materials

Abstract Glasses are generally assumed to be isotropic and there are no literature reports of elastic anisotropy for molecular glasses. However, as glasses formed by physical vapor deposition can be structurally anisotropic, it is of interest to investigate the elastic anisotropy in these materials. Micro‐Brillouin light spectroscopy is used in several experimental geometries to determine the elastic stiffness tensors of three glass films of itraconazole vapor‐deposited at substrate temperatures ( T sub ) of 330, 315, and 290 K, respectively. Significant elastic anisotropy is observed and, in these glasses, the elastic anisotropy shows a strong correlation with the molecular orientation. The out‐of‐plane and in‐plane Young's moduli of the high T sub (330 K) sample, which features a predominantly vertical molecular orientation, exhibit a high anisotropy ratio of 2.2. The observed elastic anisotropy is much larger than those previously observed in liquid crystals and even many crystalline solids.

Sponsoring Organization:
USDOE
OSTI ID:
1615853
Alternate ID(s):
OSTI ID: 1615854
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Vol. 30 Journal Issue: 23; ISSN 1616-301X
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

References (42)

High-Modulus Organic Glasses Prepared by Physical Vapor Deposition journal January 2010
Mechanical properties of simple computer glasses journal October 2019
Determination of the elastic constants of collagen by Brillouin light scattering journal November 1979
Mechanical Properties of Structure-Tunable, Vapor-Deposited TPD Glass journal November 2018
Light scattering in organic plastic crystals: I. Brillouin scattering in the hexagonal plastic crystal norbornylene journal October 1975
Indentation Plasticity and Fracture Studies of Organic Crystals journal October 2017
Nematic-like stable glasses without equilibrium liquid crystal phases journal February 2017
Brillouin Scattering in Hexagonal Crystals: Calculation of Scattering Cross Section in CdS journal September 1973
Evidence of thermal transport anisotropy in stable glasses of vapor deposited organic molecules journal March 2018
Brillouin scattering in the isotropic, nematic, and smectic- A phases of p -cyanobenzylidene- p - n -octyloxylaniline journal September 1979
Does Brillouin light scattering probe the primary glass transition process at temperatures well above glass transition? journal February 2010
Liquid Crystalline Ordering and Charge Transport in Semiconducting Materials journal July 2009
Interaction anisotropy and shear instability of aspirin polymorphs established by nanoindentation journal January 2011
The influence of pre-orientation on the optical and mechanical anisotropy of drawn polymers journal August 1967
Direct observation of plasticity and quantitative hardness measurements in single crystal cyclotrimethylene trinitramine by nanoindentation journal September 2009
Brillouin and Rayleigh studies of urea single crystals journal December 1982
Tunable Thermoelastic Anisotropy in Hybrid Bragg Stacks with Extreme Polymer Confinement journal January 2020
Highly Organized Smectic-like Packing in Vapor-Deposited Glasses of a Liquid Crystal journal January 2017
Experimental determination of the elastic coefficients of an orthorhombic material journal July 2001
Mechanical Anisotropy in Crystalline Saccharin: Nanoindentation Studies journal October 2010
Temperature-Dependent Thermoelastic Anisotropy of the Phenyl Pyrimidine Liquid Crystal journal June 2019
Organic Glasses with Exceptional Thermodynamic and Kinetic Stability journal January 2007
Revisiting the Buckling Metrology Method to Determine the Young's Modulus of 2D Materials journal January 2019
High-performance organic light-emitting diodes comprising ultrastable glass layers journal May 2018
Brillouin Scattering from Smectic Liquid Crystals journal April 1973
Nondestructive Probing of Mechanical Anisotropy in Polyimide Films on Nanoscale journal February 2010
A Method for Indirectly Measuring the Second Sound Velocity in Smectic a Liquid Crystals journal December 1988
Vapor deposition of a nonmesogen prepares highly structured organic glasses journal September 2019
The Intrinsic Mechanical Properties of Rubrene Single Crystals journal July 2012
Origin of Anisotropic Molecular Packing in Vapor-Deposited Alq3 Glasses journal December 2018
Elastic Properties of Few Nanometers Thick Polycrystalline MoS 2 Membranes: A Nondestructive Study journal November 2017
Molecular dynamics of itraconazole at ambient and high pressure journal January 2013
Determination of the Complete Elasticity of Nephila pilipes Spider Silk journal January 2020
Tunable molecular orientation and elevated thermal stability of vapor-deposited organic semiconductors journal March 2015
Anisotropic Vapor-Deposited Glasses: Hybrid Organic Solids journal January 2019
Mechanical Anisotropy of the Energetic Crystal of 1,1-Diamino-2,2-dinitroethylene (FOX-7): A Study by Nanoindentation Experiments and Density Functional Theory Calculations journal June 2016
Vapor-Deposited Glasses with Long-Range Columnar Liquid Crystalline Order journal October 2017
Sound Velocity in a Nematic Liquid Crystal journal March 1972
Influence of Molecular Shape on the Thermal Stability and Molecular Orientation of Vapor-Deposited Organic Semiconductors journal July 2017
Molecular orientation in small-molecule organic light-emitting diodes journal January 2011
The breakage behaviour of Aspirin under quasi-static indentation and single particle impact loading: Effect of crystallographic anisotropy journal June 2011
Nanoindentation in Crystal Engineering: Quantifying Mechanical Properties of Molecular Crystals journal January 2013

Similar Records

Highly organized smectic-like packing in vapor-deposited glasses of a liquid crystal
Journal Article · Mon Dec 26 00:00:00 EST 2016 · Chemistry of Materials · OSTI ID:1615853

Radial X‐Ray Diffraction Study of Superhard Early Transition Metal Dodecaborides under High Pressure
Journal Article · Wed Apr 03 00:00:00 EDT 2019 · Advanced Functional Materials · OSTI ID:1615853

Single-crystal Elasticity of Brucite, Mg(OH)2, to 15 Gpa by Brillouin Scattering
Journal Article · Sun Jan 01 00:00:00 EST 2006 · American Mineralogist · OSTI ID:1615853

Related Subjects