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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la302318j
|2 doi
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|a eng
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1 |
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|a Gor, Gennady Yu
|e verfasserin
|4 aut
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| 245 |
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|a Capillary condensation hysteresis in overlapping spherical pores
|b a Monte Carlo simulation study
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 28.12.2012
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|a Date Revised 21.08.2012
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The mechanisms of hysteretic phase transformations in fluids confined to porous bodies depend on the size and shape of pores, as well as their connectivity. We present a Monte Carlo simulation study of capillary condensation and evaporation cycles in the course of Lennard-Jones fluid adsorption in the system of overlapping spherical pores. This model system mimics pore shape and connectivity in some mesoporous materials obtained by templating cubic surfactant mesophases or colloidal crystals. We show different mechanisms of capillary hysteresis depending on the size of the window between the pores. For the system with a small window, the hysteresis cycle is similar to that in a single spherical pore: capillary condensation takes place upon achieving the limit of stability of adsorption film and evaporation is triggered by cavitation. When the window is large enough, the capillary condensation shifts to a pressure higher than that of the isolated pore, and the possibility for the equilibrium mechanism of desorption is revealed. These finding may have important implications for practical problems of assessment of the pore size distributions in mesoporous materials with cagelike pore networks
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|a Journal Article
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|a Rasmussen, Christopher J
|e verfasserin
|4 aut
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1 |
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|a Neimark, Alexander V
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 28(2012), 33 vom: 21. Aug., Seite 12100-7
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnas
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|g volume:28
|g year:2012
|g number:33
|g day:21
|g month:08
|g pages:12100-7
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|u http://dx.doi.org/10.1021/la302318j
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