Geometric confinement governs the rupture strength of H-bond assemblies at a critical length scale

Sinan Keten*, Markus J. Buehler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Using theoretical considerations and MD simulation techniques, we show that the rupture strength of H-bond assemblies is governed by geometric confinement effects, suggesting that clusters of at most 3-4 H-bonds break concurrently, even under uniform shear loading of a much larger number of H-bonds. This universally valid result leads to an intrinsic strength limitation that suggests that shorter strands with less H-bonds achieve the highest shear strength. Our finding explains how the intrinsic strength limitation of H-bonds is overcome by the formation of a nanocomposite structure of H-bond clusters, thereby enabling the formation larger, much stronger beta-sheet structures. Our results explain recent experimental proteomics data, suggesting a correlation between the shear strength and the prevalence of beta-strand lengths in biology.

Original languageEnglish (US)
Pages (from-to)13-18
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume1061
StatePublished - Dec 1 2008

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Fingerprint Dive into the research topics of 'Geometric confinement governs the rupture strength of H-bond assemblies at a critical length scale'. Together they form a unique fingerprint.

Cite this