Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 590, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2022.121665
Keywords
Bioactive glasses; Molecular dynamics; Diffusion; Structural properties
Funding
- German Research Foundation (DFG)
Ask authors/readers for more resources
This paper investigates the effect of density on the dynamics of atoms in bioactive glasses using molecular dynamics simulations. The study finds that the mobility of modifiers, especially sodium, is significantly affected by the increase in density. The complex dynamic behavior of the glass can be understood by evaluating network connectivity and pair-excess entropy.
Bioactive glasses release ions such as sodium when implanted in the human body. However, an excess of the released ions can cause problems related to cytotoxicity. The ion release control is considered one of the primary challenges in developing new bioactive glasses. Here, we use molecular dynamics simulations to investigate the effect of the density on atoms' dynamics in an archetypal phosphosilicate bioactive system. The diffusion coefficient displays three main regimes with increasing density. The mobility of the modifiers is significantly affected by the increase of the density, especially Na, compared to other elements. We use a modified Arrhenian model to access the complex dynamic behavior of 45S5 melts and correlate it to the structural changes by evaluating the network connectivity and pair-excess entropy. Overall, our results present a step toward the rational design of bioactive glasses and a key to controlling the ion release of bioactive glasses.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available