Negative linear compressibility in confined dilatating systems

The Journal of Chemical Physics
E V VakarinJ P Badiali

Abstract

The role of a matrix response to a fluid insertion is analyzed in terms of a perturbation theory and Monte Carlo simulations applied to a hard sphere fluid in a slit of fluctuating density-dependent width. It is demonstrated that a coupling of the fluid-slit repulsion, spatial confinement, and the matrix dilatation acts as an effective fluid-fluid attraction, inducing a pseudocritical state with divergent linear compressibility and noncritical density fluctuations. An appropriate combination of the dilatation rate, fluid density, and the slit size leads to the fluid states with negative linear compressibility. It is shown that the switching from positive to negative compressibility is accompanied by an abrupt change in the packing mechanism.

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Citations

May 23, 2012·Nature Materials·Zachary G Nicolaou, Adilson E Motter
Oct 10, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·E V Vakarin, J P Badiali
Feb 7, 2007·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Masayuki Uranagase, Toyonori Munakata
Feb 11, 2021·Scientific Reports·Subhash Kak
Aug 21, 2020·ACS Applied Materials & Interfaces·Argyrios AnagnostopoulosYaroslav Grosu
Feb 3, 2007·The Journal of Physical Chemistry. B·Gabriel E Aguilar-PinedaMarcelo Lozada-Cassou
Feb 22, 2007·The Journal of Physical Chemistry. B·E V VakarinJ P Badiali

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