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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.5b00716
|2 doi
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|a pubmed24n0826.xml
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|a DE-627
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|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Bruschi, Lorenzo
|e verfasserin
|4 aut
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| 245 |
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|a Adsorption on ordered and disordered duplex layers of porous anodic alumina
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|c 2015
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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 17.08.2015
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|a Date Revised 05.05.2015
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a We have carried out systematic experiments and numerical simulations of the adsorption on porous anodic aluminum oxide (AAO) duplex layers presenting either an ordered or a disordered interconnecting interface between the large (cavity) and small (constriction) sections of the structured pores. Selective blocking of the pore openings resulted in three different pore topologies: open structured pores, funnel pores, and ink-bottle pores. In the case of the structured pores having an ordered interface, the adsorption isotherms present a rich phenomenology characterized by the presence of two steps in the condensation branch and the opening of one (two) hysteresis loops during evaporation for the ink-bottle (open and funnel) pores. The isotherms can be obtained by summing the isotherms measured on uniform pores having the dimensions of the constrictions or of the cavities. The numerical analysis of the three different pore topologies indicates that the shape of the junction between the two pore sections is only important for the adsorption branch. In particular, a conic junction which resembles that of the AAO pores represents the experimental isotherms for the open and funnel pores better, but the shape of the junction in the ink bottle pores does not matter. The isotherms for the duplex layers with a disordered interface display the same general features found for the ordered duplex layers. In both cases, the adsorption branches coincide and have two steps which are shifted to lower relative pressures compared to those for the ordered duplex. Furthermore, the desorption branches comprise hysteresis loops much wider than those of the ordered duplex layers. Overall, this study highlights the important role played by morphologies where there are interconnections between large and small pores
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|a Journal Article
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|a Mistura, Giampaolo
|e verfasserin
|4 aut
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|a Phadungbut, Poomiwat
|e verfasserin
|4 aut
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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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|a Mayamei, Yashar
|e verfasserin
|4 aut
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|a Lee, Woo
|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 31(2015), 17 vom: 05. Mai, Seite 4895-905
|w (DE-627)NLM098181009
|x 1520-5827
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| 773 |
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|g volume:31
|g year:2015
|g number:17
|g day:05
|g month:05
|g pages:4895-905
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|u http://dx.doi.org/10.1021/acs.langmuir.5b00716
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