A5060757332- Surfactants and Colloidal Systems
- Pickering emulsions and particle stabilization
- Proteins in Food Systems
- Enhanced Oil Recovery Techniques
- Electrostatics and Colloid Interactions
- Rheology and Fluid Dynamics Studies
- Lipid Membrane Structure and Behavior
- Fluid Dynamics and Mixing
- Minerals Flotation and Separation Techniques
- Surface Modification and Superhydrophobicity
- Material Dynamics and Properties
- nanoparticles nucleation surface interactions
- Electrohydrodynamics and Fluid Dynamics
- Spectroscopy and Quantum Chemical Studies
- Polymer Surface Interaction Studies
- Fluid Dynamics and Heat Transfer
- Phase Equilibria and Thermodynamics
- Innovative Microfluidic and Catalytic Techniques Innovation
- Analytical Chemistry and Chromatography
- Planetary Science and Exploration
- Retinal and Macular Surgery
- Force Microscopy Techniques and Applications
- Inhalation and Respiratory Drug Delivery
- Fluid Dynamics and Thin Films
- Spacecraft and Cryogenic Technologies
Institute of Condensed Matter Chemistry and Technologies for Energy
2016-2024
National Research Council
2024
Institute for Energetics and Interphases
2008-2018
National Academies of Sciences, Engineering, and Medicine
2018
Max Planck Society
2011
Max Planck Institute of Colloids and Interfaces
2000-2011
University of Florence
2006
Centre National de la Recherche Scientifique
2004
Industriale Chimica (Italy)
1994-2003
Istituto Officina dei Materiali
1997-2000
An investigation is reported on the interfacial properties of nanometric colloidal silica dispersions in presence a cationic surfactant. These are result different phenomena such as particle attachment at interface and surfactant adsorption liquid interfaces. Since latter strongly influences hydrophobicity/lipophilicity particle, i.e., affinity for fluid environment, all those closely correlated. The equilibrium dynamic tensions liquid/air liquid/oil interfaces have been measured function...
The hydrophobicity of a particle surface can be tuned by the addition surfactants that change free energy for their attachment to liquid interface. In this work, we report an experimental study where wettability properties silica nanoparticles are modified adsorption alkyltrimethylammonium (CnTAB, n = 12, 16) on particles. We have pointed out complexes is controlled intricate balance electrostatic and hydrophobic interactions between surfactant. These play important role in structure...
The study of the interaction between Langmuir monolayers 1,2-dipalmitoyl-sn-glycerol-3-phosphocholine (DPPC), as major component lung surfactant (LS), and nanoparticles different nature, hydrophilic silica (SiO2) hydrophobic carbon black (CB), has been carried out by measuring compression Π–A isotherms response surface pressure to harmonic variations interfacial area simulating respiratory cycles in a trough. change monolayer structure induced was monitored Brewster angle microscopy. results...
The adsorption films of silica nanoparticles modified by a cationic surfactant (cetyltrimethylammonium bromide, CTAB) at the air–water interface were investigated dilational surface rheology and optical methods. Special attention was paid to slow changes properties with age. tension dynamic elasticity measured as function CTAB concentration. whole concentration range can be divided into four regions characterized different rheological behavior. Depending on concentration, close equilibrium...
A methodology for automatic measurement of surface tension liquid metals is presented. The procedure involves the digitization a television image drop metal, processing to obtain real coordinates profile, and final computation by nonlinear regression technique. method faster more reliable than other classical methods, yields results that are reproducible as precise those obtainable non-automatic procedures. An important feature this approach it can be used metallurgical tests check quality...
The interfacial properties of aqueous dispersions are strictly connected to the transfer/accumulation particles into surface layer, driven by particle hydrophobicity. addition surfactants adsorbing on and tuning their hydrophobicity represents therefore an attractive route control these liquid interfaces. These mixed systems present however rather complex behaviours, which still difficult understand, deserving both theoretical developments experimental investigations. Here results a wide...
We report here a review of particle-laden interfaces. discuss the importance particle’s wettability, accounted for by definition contact angle, on attachment particles to fluid interface and how angle is strongly affected several physicochemical parameters. The different mechanisms interfacial assembly are also addressed, being adsorption spreading most widely used processes leading well-known adsorbed spread layers, respectively. steps involved in particle-surfactant mixtures from bulk...
The effect of silica nanoparticles on the dynamic behavior monolayers composed by 1,2-Dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and a mixture DPPC with Palmitic acid (PA), has been investigated comparing dilational rheological response these lipid layers, spread water nanoparticle dispersion. To this aim, viscoelasticity measured against frequency surface area perturbation monolayer, according to Oscillatory Barrier method in Langmuir trough. These measurements were performed at...
Abstract We investigate the interfacial dynamics of a 2D self-organized mixed layer made silica nanoparticles interacting with phospholipid (DPPC) monolayers at air/water interface. This system has biological relevance, allowing investigation toxicological effects on model membranes and lung surfactants. It might also provide bio-inspired technological solutions, exploiting self-organization DPPC to produce non-trivial structuration nanoparticles. The characterization yields information NPs...
The control of the behavior oil in water emulsions requires deeper investigations on adsorption properties emulsion stabilizers at interfaces, which are fundamental to explain (de)stabilization mechanisms. In this work, we present an extensive study oil-in-water stabilized by sodium dodecyl sulfate (SDS) below its critical micellar concentration. Dynamic tensiometry, dilational rheology, and electrical conductivity measurements used investigate droplet interface, whereas aging respective was...