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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Campbell, Richard A.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2022Interfacial complexation of a neutral amphiphilic ‘tardigrade’ co-polymer with a cationic surfactant
- 2022Interfacial complexation of a neutral amphiphilic ‘tardigrade’ co-polymer with a cationic surfactant: Transition from synergy to competitioncitations
- 2022Interfacial complexation of a neutral amphiphilic ‘tardigrade’ co-polymer with a cationic surfactant: Transition from synergy to competitioncitations
- 2022Interfacial complexation of a neutral amphiphilic ‘tardigrade’ co-polymer with a cationic surfactant:Transition from synergy to competition
- 2021Tuneable interfacial surfactant aggregates mimic lyotropic phases and facilitate large scale nanopatterningcitations
- 20203D texturing of the air–water interface by biomimetic self-assemblycitations
- 2020Synergy, competition, and the “hanging” polymer layer:Interactions between a neutral amphiphilic ‘tardigrade’ comb co-polymer with an anionic surfactant at the air-water interfacecitations
- 2020Synergy, competition, and the “hanging” polymer layer: Interactions between a neutral amphiphilic ‘tardigrade’ comb co-polymer with an anionic surfactant at the air-water interfacecitations
- 2019Polydopamine layer formation at the liquid – gas interfacecitations
- 2016Smart nanogels at the air/water interfacecitations
- 2016Smart nanogels at the air/water interface:Structural studies by neutron reflectivitycitations
- 2015On the formation of dendrimer/nucleolipids surface films for directed self-assemblycitations
- 2013New method to predict the surface tension of complex synthetic and biological polyelectrolyte/surfactant mixturescitations
- 2011Effects of bulk colloidal stability on adsorption layers of poly(diallyldimethylammonium chloride)/sodium dodecyl sulfate at the air-water interface studied by neutron reflectometrycitations
- 2011Effects of bulk colloidal stability on adsorption layers of poly(diallyldimethylammonium chloride)/sodium dodecyl sulfate at the air-water interface studied by neutron reflectometrycitations
- 2011Effects of Bulk Colloidal Stability on Adsorption Layers of Poly(diallyldimethylammonium Chloride)/Sodium Dodecyl Sulfate at the Air-Water Interface Studied by Neutron Reflectometrycitations
- 2010New perspective on the cliff edge peak in the surface tension of oppositely charged polyelectrolyte/surfactant mixturescitations
- 2010New perspective on the cliff edge peak in the surface tension of oppositely charged polyelectrolyte/surfactant mixturescitations
- 2010New Perspective on the Cliff Edge Peak in the Surface Tension of Oppositely Charged Polyelectrolyte/Surfactant Mixturescitations
- 2008Competitive adsorption of neutral comb polymers and sodium dodecyl sulfate at the air/water interfacecitations
- 2007Dynamics of adsorption of an oppositely charged polymer-surfactant mixture at the air-water interfacecitations
- 2005External reflection fourier transform infrared spectroscopy of surfactants at the air-water interface:Separation of bulk and adsorbed surfactant signalscitations
- 2005External reflection fourier transform infrared spectroscopy of surfactants at the air-water interfacecitations
- 2004External reflection FTIR spectroscopy of the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) on an overflowing cylindercitations
Places of action
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article
External reflection FTIR spectroscopy of the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) on an overflowing cylinder
Abstract
<p>External reflection Fourier transform infrared spectroscopy (ER-FTIRS) has been used to study the adsorption of the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) at the air-water interface under nonequilibrium conditions. An overflowing cylinder (OFC) was used to generate a continually expanding liquid surface with a surface age of 0.1-1 s. ER-FTIR spectra were acquired by a single bounce of p- or s-polarized radiation from the flowing surface of the OFC. The C-H stretching region of CTAB spectra was analyzed both by subtraction of a reference spectrum of pure water and by a chemometric technique known as target factor analysis (TFA). The TFA method is shown to give lower scatter in the weight of the component assignable to the adsorbed CTAB monolayer and to permit analysis of spectra at lower bulk surfactant concentrations. The surface sensitivity of ER-FTIRS is demonstrated both experimentally and by theoretical modeling. Modeling shows that surfactant adsorbed at the surface and dissolved in the bulk solution can be distinguished by reflection spectroscopy but also highlights potential errors that can arise from the neglect of the bulk surfactant contribution to the ER-FTIR spectra. Polarized spectra are consistent with an isotropic distribution of transition dipole moments of the hydrocarbon chains in CTAB, Component weights of the CTAB monolayer determined by TFA are compared with an independent determination of values of the dynamic surface excess, Γ<sub>dyn</sub>, by neutron reflection and ellipsometry. The relationship between the component weights and Γ<sub>dyn</sub> shows a small but significant deviation from linearity. Possible explanations for this deviation are discussed. The feasibility of using TFA to deconvolute ER-FTIR spectra of mixtures of hydrocarbon surfactants is demonstrated.</p>