Application of isotropic periodic sum method for 4-pentyl-4′-cyanobiphenyl liquid crystal

Takuma Nozawa, Kazuaki Z. Takahashi, Shun Kameoka, Tetsu Narumi, Kenji Yasuoka

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


In future large-scale molecular dynamics (MD) simulations that will use parallel computing, the isotropic periodic sum (IPS) method is expected to effectively reduce the cost of interaction calculations while maintaining adequate accuracy. To assess the accuracy of this method in estimating low-charge-density polymer systems, we performed atomistic MD simulations of the bulk state of liquid crystal systems based on 4-pentyl-4′-cyanobiphenyl (5CB). In conditions of 270 K ≤ T ≤ 320 K and a normal pressure, the temperature dependence of the density, potential energy and order parameter was estimated using the IPS and Ewald sum method. The results of the IPS method and Ewald sum were consistent within the range of error. In conditions close to the phase transition point, however, the averaged values of potential energy and order parameter had a small difference. We concluded that the fundamental physical properties for the bulk state of 5CB systems are determined reasonably by using the IPS method, at least in conditions that are not close to the phase transition point.

Original languageEnglish
Pages (from-to)927-935
Number of pages9
JournalMolecular Simulation
Issue number10-12
Publication statusPublished - 2015 Aug 13


  • isotropic periodic sum method
  • liquid crystal
  • long-range interaction
  • molecular dynamics simulation

ASJC Scopus subject areas

  • Chemistry(all)
  • Information Systems
  • Modelling and Simulation
  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics


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