Understanding the Collapse Mechanism in Langmuir Monolayers through Polarization Modulation-Infrared Reflection Absorption Spectroscopy

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dc.contributor.author Goto, Thiago Eichi [UNIFESP]
dc.contributor.author Caseli, Luciano [UNIFESP]
dc.date.accessioned 2016-01-24T14:32:00Z
dc.date.available 2016-01-24T14:32:00Z
dc.date.issued 2013-07-23
dc.identifier http://dx.doi.org/10.1021/la402044c
dc.identifier.citation Langmuir. Washington: Amer Chemical Soc, v. 29, n. 29, p. 9063-9071, 2013.
dc.identifier.issn 0743-7463
dc.identifier.uri http://repositorio.unifesp.br/handle/11600/36547
dc.description.abstract The collapse of films at the air-water interface is related to a type of 2D-to-3D transition that occurs when a Langmuir monolayer is compressed beyond its stability limit. Studies on this issue are extremely important because defects in ultrathin solid films can be better understood if the molecular mechanisms related to collapse processes are elucidated. This paper explores how the changes of vibration of specific groups of lipid molecules, as revealed by polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS), are affected by the monolayer collapse. Different mechanisms of collapse were studied, for those lipids that undergo constant-area collapse (such as stearic acid) and for those that undergo constant-pressure collapse (such as DPPC, DPPG, and DODAB). Lipid charges also affect the mechanism of collapse, as demonstrated for two oppositely charged lipids. en
dc.description.sponsorship Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorship Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorship Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent 9063-9071
dc.language.iso eng
dc.publisher Amer Chemical Soc
dc.relation.ispartof Langmuir
dc.rights Acesso restrito
dc.title Understanding the Collapse Mechanism in Langmuir Monolayers through Polarization Modulation-Infrared Reflection Absorption Spectroscopy en
dc.type Artigo
dc.contributor.institution Universidade Federal de São Paulo (UNIFESP)
dc.description.affiliation Universidade Federal de São Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Diadema, SP, Brazil
dc.description.affiliationUnifesp Universidade Federal de São Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Diadema, SP, Brazil
dc.description.sponsorshipID FAPESP: 2008/10851-0
dc.identifier.doi 10.1021/la402044c
dc.description.source Web of Science
dc.identifier.wos WOS:000322416700006



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