Imperial College London
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DrValeriaGarbin

Faculty of Engineering, Department of Chemical Engineering

Visiting Professor
 
 
 
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Contact

 

v.garbin

 
 
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Assistant

 

Ms Sevgi Thompson +44 (0)20 7594 1478

 
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Location

 

ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{huerre and Cacho-Nerin:2017:10.1021/acs.langmuir.7b02867,
author = {huerre and Cacho-Nerin, F and udoh and Poulichet, V and de, corato and Garbin, V},
doi = {10.1021/acs.langmuir.7b02867},
journal = {Langmuir},
pages = {1020--1028},
title = {Dynamic organization of ligand-grafted nanoparticles during adsorption and surface compression at fluid-fluid interfaces},
url = {http://dx.doi.org/10.1021/acs.langmuir.7b02867},
volume = {34},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Monolayers of ligand-grafted nanoparticles at fluid interfaces exhibit a complex response to deformation due to an interplay of particle rearrangements within the monolayer, and molecular rearrangements of the ligand brush on the surface of the particles. We use grazing-incidence small-angle X-ray scattering (GISAXS) combined with pendant drop tensiometry to probe in situ the dynamic organization of ligand-grafted nanoparticles upon adsorption at a fluid–fluid interface, and during monolayer compression. Through the simultaneous measurements of interparticle distance, obtained from GISAXS, and of surface pressure, obtained from pendant drop tensiometry, we link the interfacial stress to the monolayer microstructure. The results indicate that, during adsorption, the nanoparticles form rafts that grow while the interparticle distance remains constant. For small-amplitude, slow compression of the monolayer, the evolution of the interparticle distance bears a signature of ligand rearrangements leading to a local decrease in thickness of the ligand brush. For large-amplitude compression, the surface pressure is found to be strongly dependent on the rate of compression. Two-dimensional Brownian dynamics simulations show that the rate-dependent features are not due to jamming of the monolayer, and suggest that they may be due to out-of-plane reorganization of the particles (for instance expulsion or buckling). The corresponding GISAXS patterns are also consistent with out-of-plane reorganization of the nanoparticles.
AU  - huerre
AU  - Cacho-Nerin,F
AU  - udoh
AU  - Poulichet,V
AU  - de,corato
AU  - Garbin,V
DO  - 10.1021/acs.langmuir.7b02867
EP  - 1028
PY  - 2017///
SN  - 0743-7463
SP  - 1020
TI  - Dynamic organization of ligand-grafted nanoparticles during adsorption and surface compression at fluid-fluid interfaces
T2  - Langmuir
UR  - http://dx.doi.org/10.1021/acs.langmuir.7b02867
UR  - http://hdl.handle.net/10044/1/54673
VL  - 34
ER  -
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