Auxeticity of Yukawa Systems with Nanolayers in the (111) Crystallographic Plane.

Paweł M Pigłowski,Krzysztof W Wojciechowski,Konstantin V Tretiakov,Jakub W Narojczyk,Artur A Poźniak

doi:10.3390/ma10111338

Paweł M Pigłowski, Krzysztof W Wojciechowski + Show 3 more

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https://doi.org/10.3390/ma10111338

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Abstract

Elastic properties of model crystalline systems, in which the particles interact via the hard potential (infinite when any particles overlap and zero otherwise) and the hard-core repulsive Yukawa interaction, were determined by Monte Carlo simulations. The influence of structural modifications, in the form of periodic nanolayers being perpendicular to the crystallographic axis [111], on auxetic properties of the crystal was investigated. It has been shown that the hard sphere nanolayers introduced into Yukawa crystals allow one to control the elastic properties of the system. It has been also found that the introduction of the Yukawa monolayers to the hard sphere crystal induces auxeticity in the -direction, while maintaining the negative Poisson’s ratio in the -direction, thus expanding the partial auxeticity of the system to an additional important crystallographic direction.

Highlights

The colloidal crystals [1] have been a subject of intense studies in recent years [2,3,4,5,6,7,8,9]
The purpose of this paper is to present data that show that the discussed structural modifications have a significant effect on auxeticity of the studied model system
This work is a continuation of the study on the effect of structural modifications on elastic properties, and on the auxetic properties of the model of nanocomposites

Summary

Introduction

The colloidal crystals [1] have been a subject of intense studies in recent years [2,3,4,5,6,7,8,9]. This is mainly due to their potential applications [10,11,12]. Materials with negative Poisson’s ratio (so-called auxetics) [21] increase their dimensions in directions perpendicular to the applied stretching and shrink in directions perpendicular to the applied compression. Materials in which the Poisson’s ratio is negative only in some crystallographic directions are called partial auxetics [22]

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