ThuliumV1, Main, Exploration, bibRecord, 000531

Alignment of bicelles studied with high-field magnetic birefringence and small-angle neutron scattering measurements.

Identifieur interne : 000531 ( Main/Exploration ); précédent : 000530; suivant : 000532

Alignment of bicelles studied with high-field magnetic birefringence and small-angle neutron scattering measurements.

Auteurs : Marianne Liebi [Suisse] ; Peter G. Van Rhee ; Peter C M. Christianen ; Joachim Kohlbrecher ; Peter Fischer ; Peter Walde ; Erich J. Windhab

Source :

Langmuir : the ACS journal of surfaces and colloids [ 1520-5827 ] ; 2013.

RBID : pubmed:23406168

Descripteurs français

KwdFr :
- Biréfringence, Diffraction de neutrons, Diffusion aux petits angles, Magnétisme.
MESH :
- Biréfringence, Diffraction de neutrons, Diffusion aux petits angles, Magnétisme.

English descriptors

KwdEn :
- Birefringence, Magnetics, Neutron Diffraction, Scattering, Small Angle.
MESH :
- Birefringence, Magnetics, Neutron Diffraction, Scattering, Small Angle.

Abstract

Birefringence measurements at high magnetic field strength of up to 33 T were used to detect magnetically induced alignment of bicelles composed of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), cholesterol, and 1,2-dimyristoyl-sn-glycero-3-phosphoethanolamine-diethylenetriaminepentaacetate (DMPE-DTPA) with complexed lanthanide ions. These birefringence measurements together with a small-angle neutron scattering (SANS) analysis in a magnetic field showed parallel alignment of the bicelles if the lanthanide was thulium (Tm(3+)), and perpendicular alignment with dysprosium (Dy(3+)). With the birefringence measurements, the order parameter S can be determined as a function of the magnetic field strength, if the magnetic alignment reaches saturation. Additional structural information can be obtained if the maximum induced birefringence is considered. The degree of alignment of the studied bicelles increased with decreasing temperature from 40 to 5 °C and showed a new bicellar structure comprising a transient hole formation at intermediate temperatures (20 °C) during heating from 5 to 40 °C.

DOI: 10.1021/la3050785
PubMed: 23406168

Affiliations:

Suisse

Le document en format XML

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<front><div type="abstract" xml:lang="en">Birefringence measurements at high magnetic field strength of up to 33 T were used to detect magnetically induced alignment of bicelles composed of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), cholesterol, and 1,2-dimyristoyl-sn-glycero-3-phosphoethanolamine-diethylenetriaminepentaacetate (DMPE-DTPA) with complexed lanthanide ions. These birefringence measurements together with a small-angle neutron scattering (SANS) analysis in a magnetic field showed parallel alignment of the bicelles if the lanthanide was thulium (Tm(3+)), and perpendicular alignment with dysprosium (Dy(3+)). With the birefringence measurements, the order parameter S can be determined as a function of the magnetic field strength, if the magnetic alignment reaches saturation. Additional structural information can be obtained if the maximum induced birefringence is considered. The degree of alignment of the studied bicelles increased with decreasing temperature from 40 to 5 °C and showed a new bicellar structure comprising a transient hole formation at intermediate temperatures (20 °C) during heating from 5 to 40 °C.</div>
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Alignment of bicelles studied with high-field magnetic birefringence and small-angle neutron scattering measurements.

Alignment of bicelles studied with high-field magnetic birefringence and small-angle neutron scattering measurements.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

	Serveur d'exploration sur le thulium
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