Nanocavity hardening: impact of broken bonds at the negatively curved surfaces
| dc.creator | Sun, Chang Q. | |
| dc.date | 2008-01-05 | |
| dc.date.accessioned | 2026-07-07T08:52:47Z | |
| dc.date.available | 2026-07-07T08:52:47Z | |
| dc.description | It is expected that atomic vacancies or nanometric cavities reduce the number of chemical bonds of nearby atoms and hence the strength of a voided solid. However, the hardness of a porous specimen does not always follow this simple picture of coordination counting. An introduction of a certain amount of atomic vacancies or nanocavities could, instead, enhance the mechanical strength of the porous specimen. Understanding the mechanism behind the intriguing observations remains yet a high challenge. Here we show with analytical expressions that the shortened and strengthened bonds between the under-coordinated atoms and the associated local strain and energy trapping [Sun, Prog Solid State Chem 35, 1-159 (2007)] in the negatively curved surface skins dominate the observed nanocavity hardening. Agreement between predictions and the experimentally observed size-dependence of mechanical strength of some nanoporous materials evidences for the proposed mechanism. | |
| dc.identifier | https://arxiv.org/abs/0801.0772 | |
| dc.identifier | http://arxiv.org/abs/0801.0772 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/145398 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Nanocavity hardening: impact of broken bonds at the negatively curved surfaces | |
| dc.type | text |