DC FieldValueLanguage
dc.contributor.authorKityk, Andriy V.-
dc.contributor.authorGor, Gennady-
dc.contributor.authorHuber, Patrick-
dc.date.accessioned2021-10-13T17:25:27Z-
dc.date.available2021-10-13T17:25:27Z-
dc.date.issued2021-
dc.identifier.citationMolecular Physics 119 (15-16): e1909160 (2021)de_DE
dc.identifier.issn0026-8976de_DE
dc.identifier.urihttp://hdl.handle.net/11420/10513-
dc.description.abstractWe present a capacitance method to measure the adsorption of rod-like nematogens (4-cyano- (Formula presented.) -pentylbiphenyl, 5CB) from a binary liquid 5CB/cyclohexane solution into a monolithic mesoporous silica membrane traversed by tubular pores with radii of 5.4 nm at room temperature. The resulting adsorption isotherm is reminiscent of classical type II isotherms of gas adsorption in mesoporous media. Its analysis by a model for adsorption from binary solutions, as inspired by the Brunauer–Emmett–Teller (BET) approach for gas adsorption on solid surfaces, indicates that the first adsorbed monolayer consists of flat-lying (homogeneously anchored) 5CB molecules at the pore walls. An underestimation of the adsorbed 5CB amount by the adsorption model compared to the measured isotherm for high 5CB concentrations hint towards a capillary filling transition in the mesopores similar to capillary condensation, i.e. film-growth at the pore walls is replaced by filling of the pore centres by the liquid crystal. The experimental method and thermodynamic analysis presented here can easily be adapted to other binary liquid solutions and thus allows a controlled filling of mesoporous materials with non-volatile molecular systems.en
dc.language.isoende_DE
dc.relation.ispartofMolecular physicsde_DE
dc.subjectAdsorptionde_DE
dc.subjectbinary solutionde_DE
dc.subjectcapacitancede_DE
dc.subjectisothermde_DE
dc.subjectliquid crystalde_DE
dc.titleAdsorption from binary liquid solutions into mesoporous silica: a capacitance isotherm on 5CB nematogen/cyclohexane mixturesde_DE
dc.typeArticlede_DE
dc.type.diniarticle-
dcterms.DCMITypeText-
tuhh.abstract.englishWe present a capacitance method to measure the adsorption of rod-like nematogens (4-cyano- (Formula presented.) -pentylbiphenyl, 5CB) from a binary liquid 5CB/cyclohexane solution into a monolithic mesoporous silica membrane traversed by tubular pores with radii of 5.4 nm at room temperature. The resulting adsorption isotherm is reminiscent of classical type II isotherms of gas adsorption in mesoporous media. Its analysis by a model for adsorption from binary solutions, as inspired by the Brunauer–Emmett–Teller (BET) approach for gas adsorption on solid surfaces, indicates that the first adsorbed monolayer consists of flat-lying (homogeneously anchored) 5CB molecules at the pore walls. An underestimation of the adsorbed 5CB amount by the adsorption model compared to the measured isotherm for high 5CB concentrations hint towards a capillary filling transition in the mesopores similar to capillary condensation, i.e. film-growth at the pore walls is replaced by filling of the pore centres by the liquid crystal. The experimental method and thermodynamic analysis presented here can easily be adapted to other binary liquid solutions and thus allows a controlled filling of mesoporous materials with non-volatile molecular systems.de_DE
tuhh.publisher.doi10.1080/00268976.2021.1909160-
tuhh.publication.instituteMaterial- und Röntgenphysik M-2de_DE
tuhh.type.opus(wissenschaftlicher) Artikel-
dc.type.driverarticle-
dc.type.casraiJournal Article-
tuhh.container.issue15-16de_DE
tuhh.container.volume119de_DE
dc.identifier.scopus2-s2.0-85103597566de_DE
tuhh.container.articlenumbere1909160de_DE
item.grantfulltextnone-
item.languageiso639-1en-
item.creatorOrcidKityk, Andriy V.-
item.creatorOrcidGor, Gennady-
item.creatorOrcidHuber, Patrick-
item.cerifentitytypePublications-
item.openairetypeArticle-
item.creatorGNDKityk, Andriy V.-
item.creatorGNDGor, Gennady-
item.creatorGNDHuber, Patrick-
item.mappedtypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.fulltextNo Fulltext-
crisitem.author.deptMaterial- und Röntgenphysik M-2-
crisitem.author.orcid0000-0002-4823-3220-
crisitem.author.orcid0000-0001-7455-1778-
crisitem.author.orcid0000-0002-2126-9100-
crisitem.author.parentorgStudiendekanat Maschinenbau-
Appears in Collections:Publications without fulltext
Show simple item record

Page view(s)

14
Last Week
0
Last month
checked on Nov 30, 2021

Google ScholarTM

Check

Add Files to Item

Note about this record

Cite this record

Export

Items in TORE are protected by copyright, with all rights reserved, unless otherwise indicated.