We study the change in the temperature of maximum density (TMD) of a water-like solvent when small amounts of solute are added to the mixture. The water is modeled as a two length scales potential, which is known to exhibit water-like characteristic anomalies, while the solute is chosen to have an attractive interaction with the solvent. If the solute is a structure maker the TMD increases with the addition of solute, while if it is a structure breaker the TMD decreases. Both in an exact one dimensional model and using molecular dynamics in three dimensions we show that the necessary ingredient to represent structure makers is a strong solute-solvent attraction.
@article{arxiv.2204.12448,
title = {Density anomaly in a minimum model of water-alcohol mixtures},
author = {Marco Antônio Habitzreuter and Marcia C. Barbosa},
journal= {arXiv preprint arXiv:2204.12448},
year = {2022}
}
Comments
This paper has been withdrawn by the authors due to incorrect density plots in the 3D system