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231223s2011 xx |||||o 00| ||eng c |
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|a 10.1021/la104279v
|2 doi
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|a eng
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| 100 |
1 |
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|a Fan, Chunyan
|e verfasserin
|4 aut
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| 245 |
1 |
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|a On the cavitation and pore blocking in slit-shaped ink-bottle pores
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 13.07.2011
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|a Date Revised 30.03.2011
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a We present GCMC simulations of argon adsorption in slit pores of different channel geometry. We show that the isotherm for an ink-bottle pore can be reconstructed as a linear combination of the local isotherms of appropriately chosen independent unit cells. Second, depending on the system parameters and operating conditions, the phenomena of cavitation and pore blocking can occur for a given configuration of the ink-bottle pore by varying the geometrical aspect ratio. Although it has been argued in the literature that the geometrical aspects of the system govern the evaporation mechanism (either cavitation or pore blocking), we here put forward an argument that the local compressibility in different parts of the ink-bottle pore is the deciding factor for evaporation. When the fluid in the small neck is strongly bound, cavitation is the governing process, and molecules in the cavity evaporate to the surrounding bulk gas via a mass transfer mechanism through the pore neck. When the pore neck is sufficiently large, the system of neck and cavity evaporates at the same pressure, which is a consequence of the comparable compressibility between the fluid in the neck and that in the cavity. This suggests that local compressibility is the measure of cohesiveness of the fluid prior to evaporation. One consequence that we derive from the analysis of isotherms of a number of connected pores is that by analyzing the adsorption branch or the desorption branch of an experimental isotherm may not lead to the correct pore sizes and the correct pore volume distribution
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|a Journal Article
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1 |
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|a Do, D D
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Nicholson, D
|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 1992
|g 27(2011), 7 vom: 05. Apr., Seite 3511-26
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:27
|g year:2011
|g number:7
|g day:05
|g month:04
|g pages:3511-26
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|u http://dx.doi.org/10.1021/la104279v
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