2012/01/31 by A. Ciach, Alina Ciach, O. Patsahan +1 · 18 citations
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Chemical physics #Chemistry #Cluster (spacecraft) #Cluster size #Colloid #Condensed matter physics #Electronic structure #Equation of state #Instability #Material Dynamics and Properties #Materials science #Mechanics #Mesoscopic physics #Phase (matter) #Phase Equilibria and Thermodynamics #Physical chemistry #Physics #Quantum mechanics #Range (aeronautics) #Statistical physics #Thermodynamics #Volume fraction #cond-mat.stat-mech
paper · pdf · doi:10.5488/cmp.15.23604
published in Condensed Matter Physics 15(2), 23604 (Institute for Condensed Matter Physics of NAS of Ukraine) · 16 pages, 14 figures
openalex publication_date 2012/06/01 · arxiv created 2012/07/12 · arxiv updated 2012/07/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Equation of state for systems with particles self-assembling into aggregates is derived within a mesoscopic theory combining density functional and field-theoretic approaches. We focus on the effect of mesoscopic fluctuations in the disordered phase. The pressure -volume fraction isotherms are calculated explicitly for two forms of the short-range attraction long-range repulsion potential. Mesoscopic fluctuations lead to an increased pressure in each case, except for very small volume fractions. When large clusters are formed, the mechanical instability of the system is present at much higher temperature than found in mean-field approximation. In this case phase separation competes with the formation of periodic phases (colloidal crystals). In the case of small clusters, no mechanical instability associated with separation into dilute and dense phases appears.