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Waterlike features, liquid–crystal phase and self-assembly in Janus dumbbells

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  • Bordin, José Rafael

Abstract

We explore the phase diagram of Janus nanoparticles using Molecular Dynamics simulations. Each monomer in the dimer has distinct characteristics. One type of monomer interacts by a Lennard Jones potential, while the other type interacts through a two length scale potential. Previous studies for the monomeric system using this specific two length scale potential do not indicate the presence of waterlike anomalies. However, our results show that the combination of two length scales potential and LJ potential in the Janus nanoparticle will lead to thermodynamic and dynamic anomalies. The self-assembly properties were also explored. We observe distinct kinds of self-assembled structures and a liquid–crystal phase. This result indicates that it is possible to create Janus nanoparticles with waterlike features using monomers without anomalous behavior. The anomalies and structures are explained with the two length scale potential characteristics.

Suggested Citation

  • Bordin, José Rafael, 2016. "Waterlike features, liquid–crystal phase and self-assembly in Janus dumbbells," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 459(C), pages 1-8.
    • Handle: RePEc:eee:phsmap:v:459:y:2016:i:c:p:1-8
    DOI: 10.1016/j.physa.2016.04.032
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    References listed on IDEAS

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    1. Barros de Oliveira, Alan & Barbosa, Marcia C. & Netz, Paulo A., 2007. "Interplay between structure and density anomaly for an isotropic core-softened ramp-like potential," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 386(2), pages 744-747.
    2. Netz, Paulo.A & Starr, Francis.W & Barbosa, Marcia C & Stanley, H.Eugene, 2002. "Relation between structural and dynamical anomalies in supercooled water," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 314(1), pages 470-476.
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    Cited by:

    1. Nogueira, T.P.O. & Bordin, José Rafael, 2022. "Patterns in 2D core-softened systems: From sphere to dumbbell colloids," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 605(C).

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