2PM

Two-point microrheology of heterogeneous langmuir films

 Coordinatore UNIVERSITE LYON 1 CLAUDE BERNARD 

 Organization address address: BOULEVARD DU 11 NOVEMBRE 1918 NUM43
city: VILLEURBANNE CEDEX
postcode: 69622

contact info
Titolo: Dr.
Nome: Javier
Cognome: Olaiz
Email: send email
Telefono: 33472697600
Fax: 33472697609

 Nazionalità Coordinatore France [FR]
 Totale costo 225˙615 €
 EC contributo 225˙615 €
 Programma FP7-PEOPLE
Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
 Code Call FP7-PEOPLE-2011-IOF
 Funding Scheme MC-IOF
 Anno di inizio 0
 Periodo (anno-mese-giorno) 0000-00-00   -   0000-00-00

 Partecipanti

# participant  country  role  EC contrib. [€] 
1    UNIVERSITE LYON 1 CLAUDE BERNARD

 Organization address address: BOULEVARD DU 11 NOVEMBRE 1918 NUM43
city: VILLEURBANNE CEDEX
postcode: 69622

contact info
Titolo: Dr.
Nome: Javier
Cognome: Olaiz
Email: send email
Telefono: 33472697600
Fax: 33472697609

FR (VILLEURBANNE CEDEX) coordinator 225˙615.75

Mappa


 Word cloud

Esplora la "nuvola delle parole (Word Cloud) per avere un'idea di massima del progetto.

interface    interfaces    viscoelastic    films    surfactants    heterogeneous    liquid    model    soft    rheological    langmuir    particle    membranes    microrheology    materials    extend    viscosities    surface    monolayers    technique   

 Obiettivo del progetto (Objective)

'On the one hand, microrheology has been a powerful tool since the mid-80's for characterizing 3D viscoelastic materials. On the other hand, the study of soft interfaces has identified several poorly characterized complex systems including low-surface-viscosity Langmuir films and spatially heterogeneous Langmuir films. This proposal represents a merger between these two ideas: we propose to characterize the rheological properties of interfaces, taking into account their full complexity, including adjacent 3D materials, microscopic spatial heterogeneities and nonlinear effects. We will develop and enhance a two-particle surface microrheology, and provide this way new characterizations of these soft interfaces.

Using this method, our research objectives include: [1] measuring very low surface viscosities achieved by spreading surfactants (DpPC) at an air/water interface and which are so low that they have not been measured by other techniques. Then, turning to monolayers of proteins (beta-lactoglobulin), we will further extend this technique to viscoelastic membranes and measure surface elasticities. [2] Focusing on heterogeneous monolayers with complex properties. Under surface pressure, surfactants form heterogeneous structures such as liquid expanded and liquid condensed phases to which we will apply our technique to measure length-scale dependent surface viscosities. We will finally measure the flow field and extend a 3D model by Levine and Lubensky to capture the most important features of the rheology of this spatially heterogeneous films. If successful, the model will be able to account for differences between the 1-particle and 2-particle measurements, in other words, reconciling the local and global rheological behavior of the interface.

This project provides benchmark experiments on heterogeneous flat layers paving the way for further studies of more complex systems such as cell plasma membranes which present heterogeneous surfaces and curvature.'

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