Unusually Large Young’s Moduli of Amino Acid Molecular Crystals
Abstract
Young’s moduli of selected amino acid molecular crystals were studied both experimentally and computationally using nanoindentation and dispersion‐corrected density functional theory. The Young modulus is found to be strongly facet‐dependent, with some facets exhibiting exceptionally high values (as large as 44 GPa). The magnitude of Young’s modulus is strongly correlated with the relative orientation between the underlying hydrogen‐bonding network and the measured facet. Furthermore, we show computationally that the Young modulus can be as large as 70–90 GPa if facets perpendicular to the primary direction of the hydrogen‐bonding network can be stabilized. This value is remarkably high for a molecular solid and suggests the design of hydrogen‐bond networks as a route for rational design of ultra‐stiff molecular solids.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 16, 2015
- Source ID
- 10.1002/anie.201505813
Entities
People
- Andrew M Rappe
- David Ehre
- Elena Meirzadeh
- Ido Azuri
- Igor Lubomirsky
- Leeor Kronik
- Meir Lahav
- Sidney R Cohen
Organizations
- Israel Science Foundation
- Office of Naval Research