منابع مشابه
Negative compressibility , negative Poisson ’ s ratio , and stability
The role of negative compressibility is considered in detail. Experimental observations of negative bulk modulus in prestrained foam are presented and interpreted. A constrained microscopic model which exhibits negative compressibility is proposed. Some other negative and counterintuitive properties of matter, like negative Poisson’s ratio, negative thermal expansion, negative specific heat, an...
متن کاملMechanical metamaterials with negative compressibility transitions.
When tensioned, ordinary materials expand along the direction of the applied force. Here, we explore network concepts to design metamaterials exhibiting negative compressibility transitions, during which a material undergoes contraction when tensioned (or expansion when pressured). Continuous contraction of a material in the same direction of an applied tension, and in response to this tension,...
متن کاملNegative linear compressibility in confined dilatating systems.
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 wit...
متن کاملNegative area compressibility in silver(I) tricyanomethanide.
The molecular framework Ag(tcm) (tcm(-) = tricyanomethanide) expands continuously in two orthogonal directions under hydrostatic compression. The first of its kind, this negative area compressibility behaviour arises from the flattening of honeycomb-like layers during rapid pressure-driven collapse of the interlayer separation.
متن کاملChemically driven negative linear compressibility in sodium amidoborane, Na(NH2BH3)
Over the past few years we have been witnessing a surge of scientific interest to materials exhibiting a rare mechanical effect such as negative linear compressibility (NLC). Here we report on strong NLC found in an ionic molecular crystal of sodium amidoborane (NaAB) - easily-accessible, optically transparent material. In situ Raman measurements revealed abnormal elongation of B-N and N-H bond...
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ژورنال
عنوان ژورنال: physica status solidi (RRL) - Rapid Research Letters
سال: 2008
ISSN: 1862-6254,1862-6270
DOI: 10.1002/pssr.200802101