This page has only limited features, please log in for full access.
Highly hydrophobic and superhydrophobic materials obtained from recycled polymers represent an interesting challenge to recycle and reuse advanced performance materials after their first life. In this article, we present a simple and low-cost method to fabricate a superhydrophobic surface by employing polytetrafluoroethylene (PTFE) powder in polystyrene (PS) dispersion. With respect to the literature, the superhydrophobic surface (SHS) was prepared by utilizing a spray- coating technique at room temperature, a glass substrate without any further modification or thermal treatment, and which can be applied onto a large area and on to any type of material with some degree of fine control over the wettability properties. The prepared surface showed superhydrophobic behavior with a water contact angle (CA) of 170°; furthermore, the coating was characterized with different techniques, such as a 3D confocal profilometer, to measure the average roughness of the coating, and scanning electron microscopy (SEM) to characterize the surface morphology. In addition, the durability of SH coating was investigated by a long-water impact test (raining test), thermal treatment at high temperature, an abrasion test, and in acidic and alkaline environments. The present study may suggest an easy and scalable method to produce SHS PS/PTFE films that may find implementation in various fields.
Francesca Cirisano; Michele Ferrari. Superhydrophobicity and Durability in Recyclable Polymers Coating. Sustainability 2021, 13, 8244 .
AMA StyleFrancesca Cirisano, Michele Ferrari. Superhydrophobicity and Durability in Recyclable Polymers Coating. Sustainability. 2021; 13 (15):8244.
Chicago/Turabian StyleFrancesca Cirisano; Michele Ferrari. 2021. "Superhydrophobicity and Durability in Recyclable Polymers Coating." Sustainability 13, no. 15: 8244.
One of the most important factors determining a significant reduction in optical devices’ efficiency is the accumulation of soiling substances such as dust, which, especially in solar power plants, implies higher costs and materials ageing. The use of superhydrophobic (SH) coatings, water contact angle (CA) greater than 150°, represents a suitable solution to improve the self-cleaning action while at the same time providing high transmittance for energy conversion. A mixed organic–inorganic SH coating with surface roughness below 100 nm was prepared by an easily scalable spray method and employed, allowing us to modulate the covered area and transparency. The coating has been also investigated while simulating pollution agents like acid rain, harsh environments, and the impact of continuous water droplets and dust particles with different physicochemical properties. The spray coating method allows us to obtain a modulated SH and self-cleaning surface showing CA > 170°, high transmittance in UV-Vis range and the ability to completely restore its initial properties in terms of wettability and transmittance after durability and soiling tests.
Michele Ferrari; Paolo Piccardo; Justine Vernet; Francesca Cirisano. High Transmittance Superhydrophobic Coatings with Durable Self-Cleaning Properties. Coatings 2021, 11, 493 .
AMA StyleMichele Ferrari, Paolo Piccardo, Justine Vernet, Francesca Cirisano. High Transmittance Superhydrophobic Coatings with Durable Self-Cleaning Properties. Coatings. 2021; 11 (5):493.
Chicago/Turabian StyleMichele Ferrari; Paolo Piccardo; Justine Vernet; Francesca Cirisano. 2021. "High Transmittance Superhydrophobic Coatings with Durable Self-Cleaning Properties." Coatings 11, no. 5: 493.
In this work the authors review the recent literature related to new solutions to prepare coatings with amphiphobic properties in order to provide self-maintaining systems able to limit the human intervention especially in large plants or harsh environments or, generally speaking, to keep the original functionalities of a solar module. Amphiphobic coatings match the requirements preventing both water and oil based pollutants from dust accumulation to natural and urban aerosols, from agriculture dispersions to bird droppings. The increasing need of renewable energy requires this step to be seriously faced with the aim to increase the yield and decrease the modules degradation. Still many issues have to be overcome and here we focus on surface aspects of aging and possible maintenance of the optical features of a solar panel.
Michele Ferrari; Francesca Cirisano. High transmittance and highly amphiphobic coatings for environmental protection of solar panels. Advances in Colloid and Interface Science 2020, 286, 102309 .
AMA StyleMichele Ferrari, Francesca Cirisano. High transmittance and highly amphiphobic coatings for environmental protection of solar panels. Advances in Colloid and Interface Science. 2020; 286 ():102309.
Chicago/Turabian StyleMichele Ferrari; Francesca Cirisano. 2020. "High transmittance and highly amphiphobic coatings for environmental protection of solar panels." Advances in Colloid and Interface Science 286, no. : 102309.
An increase in temperature typically leads to a decrease in the interfacial tension of a water/oil interface. The addition of surfactants to the system can complicate the situation significantly, i.e., the interfacial tension can increase or decrease with an increasing temperature. For most concentrations of the two studied surfactants, the cationic tetradecyl trimethyl ammonium bromide (TTAB) and the nonionic tridecyl dimethyl phosphine oxide (C13DMPO), the measured interfacial tension of the aqueous mixed surfactant solutions against hexane increases when the temperature decreases between 30 °C and 20 °C. However, with a further temperature decrease between 20 °C and 15 °C, the reverse effect has also been observed at some concentrations, i.e., a decrease of interfacial tension. Additionally, the corresponding dilational interfacial visco-elasticity shows some discrepant temperature effects, depending on the bulk concentration and oscillation frequency. The experiments have been performed with a capillary pressure tensiometer under the conditions of micro-gravity. The reason for the positive and negative interfacial tension and visco-elasticity gradients, respectively, within certain ranges of the temperature, concentration and mixing ratios, are discussed on the basis of all available parameters, such as the solubility and partitioning of the surfactants in the two liquid phases and the oscillation frequency.
Volodymyr I. Kovalchuk; Giuseppe Loglio; Alexey G. Bykov; Michele Ferrari; Jürgen Krägel; Libero Liggieri; Reinhard Miller; Olga Yu. Milyaeva; Boris A. Noskov; Francesca Ravera; Eva Santini; Emanuel Schneck. Effect of Temperature on the Dynamic Properties of Mixed Surfactant Adsorbed Layers at the Water/Hexane Interface under Low-Gravity Conditions. Colloids and Interfaces 2020, 4, 27 .
AMA StyleVolodymyr I. Kovalchuk, Giuseppe Loglio, Alexey G. Bykov, Michele Ferrari, Jürgen Krägel, Libero Liggieri, Reinhard Miller, Olga Yu. Milyaeva, Boris A. Noskov, Francesca Ravera, Eva Santini, Emanuel Schneck. Effect of Temperature on the Dynamic Properties of Mixed Surfactant Adsorbed Layers at the Water/Hexane Interface under Low-Gravity Conditions. Colloids and Interfaces. 2020; 4 (3):27.
Chicago/Turabian StyleVolodymyr I. Kovalchuk; Giuseppe Loglio; Alexey G. Bykov; Michele Ferrari; Jürgen Krägel; Libero Liggieri; Reinhard Miller; Olga Yu. Milyaeva; Boris A. Noskov; Francesca Ravera; Eva Santini; Emanuel Schneck. 2020. "Effect of Temperature on the Dynamic Properties of Mixed Surfactant Adsorbed Layers at the Water/Hexane Interface under Low-Gravity Conditions." Colloids and Interfaces 4, no. 3: 27.
Coatings with high water repellence represent a promising field for biomedical applications. Superhydrophobicity (SH) can be used for preventing adhesion, controlling cell deposition, and spreading by inhibition of adsorption processes at liquid–solid interfaces. The recyclability of medical aids like fabrics can open the way for lower cost and more environmentally-friendly solutions. In this case, two different coatings form recyclable and low global warming potential materials and green solvents have been prepared and characterized based on their wettability properties. The resulting substrates have been used for the adhesion and spreading of representative skin cell lines, both tumoral and non-tumoral, showing a strong decrease in cell viability with values < 10%. The coated substrates showed a complete recovery on initial SH properties after rinsing with suitable solvents.
Michele Ferrari; Francesca Cirisano; M. Carmen Morán. Regenerable Superhydrophobic Coatings for Biomedical Fabrics. Coatings 2020, 10, 578 .
AMA StyleMichele Ferrari, Francesca Cirisano, M. Carmen Morán. Regenerable Superhydrophobic Coatings for Biomedical Fabrics. Coatings. 2020; 10 (6):578.
Chicago/Turabian StyleMichele Ferrari; Francesca Cirisano; M. Carmen Morán. 2020. "Regenerable Superhydrophobic Coatings for Biomedical Fabrics." Coatings 10, no. 6: 578.
In vitro tests for assessing cell viability and drug response are widely employed for determining cytotoxicity of drugs, chemicals, or material substrates. These assays have some advantages, such as speed, reduced cost, and potential for automation. However, since these tests are often run with a huge amount of cells, the characteristic properties of a single cell can be masked leading to a lack of the diagnostic features of these assays. Vital processes as proliferation and cell death (either necrosis or apoptosis) are associated to drastic changes of volume and surface analysis techniques like 3D optical scanning profilometry allow noninvasive and nondestructive approach with fast detection and good resolution at nano-microscale. Here, we demonstrate how coupling noninvasive morphological surface analysis techniques with well assessed biochemical methods can help to establish the relationship between the modifications on cellular viability induced by precursors of proliferation and cell death and variations on cell volume induced by these treatments. The proposed approach has demonstrated improved efficiency on the assessment of inductive changes on tumoral cells in comparison to non-tumoral cells upon administration of proliferative nontoxic or cytotoxic substances like chemotherapeutics.
M. Carmen Morán; Francesca Cirisano; Michele Ferrari. 3D profilometry and cell viability studies for drug response screening. Materials Science and Engineering: C 2020, 115, 111142 .
AMA StyleM. Carmen Morán, Francesca Cirisano, Michele Ferrari. 3D profilometry and cell viability studies for drug response screening. Materials Science and Engineering: C. 2020; 115 ():111142.
Chicago/Turabian StyleM. Carmen Morán; Francesca Cirisano; Michele Ferrari. 2020. "3D profilometry and cell viability studies for drug response screening." Materials Science and Engineering: C 115, no. : 111142.
Lipid layers are considered among the first protective barriers of the human body against pollutants, e.g., skin, lung surfactant, or tear film. This makes it necessary to explore the physico-chemical bases underlying the interaction of pollutants and lipid layers. This work evaluates using a pool of surface-sensitive techniques, the impact of carbon black and fumed silica particles on the behavior of Langmuir monolayers of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC). The results show that the incorporation of particles into the lipid monolayers affects the surface pressure–area isotherm of the DPPC, modifying both the phase behavior and the collapse conditions. This is explained considering that particles occupy a part of the area available for lipid organization, which affects the lateral organization of the lipid molecules, and consequently the cohesion interactions within the monolayer. Furthermore, particles incorporation worsens the mechanical performance of lipid layers, which may impact negatively in different processes presenting biological relevance. The modification induced by the particles has been found to be dependent on their specific chemical nature. This work tries to shed light on some of the most fundamental physico-chemical bases governing the interaction of pollutants with lipid layers, which plays an essential role on the design of strategies for preventing the potential health hazards associated with pollution.
Eduardo Guzmán; Eva Santini; Michele Ferrari; Libero Liggieri; Francesca Ravera. Interaction of Particles with Langmuir Monolayers of 1,2-Dipalmitoyl-Sn-Glycero-3-Phosphocholine: A Matter of Chemistry? Coatings 2020, 10, 469 .
AMA StyleEduardo Guzmán, Eva Santini, Michele Ferrari, Libero Liggieri, Francesca Ravera. Interaction of Particles with Langmuir Monolayers of 1,2-Dipalmitoyl-Sn-Glycero-3-Phosphocholine: A Matter of Chemistry? Coatings. 2020; 10 (5):469.
Chicago/Turabian StyleEduardo Guzmán; Eva Santini; Michele Ferrari; Libero Liggieri; Francesca Ravera. 2020. "Interaction of Particles with Langmuir Monolayers of 1,2-Dipalmitoyl-Sn-Glycero-3-Phosphocholine: A Matter of Chemistry?" Coatings 10, no. 5: 469.
In this communication, the single element version of the fractional Maxwell model (single-FMM or Scott–Blair model) is adopted to quantify the observed behavior of the linear interfacial dilational viscoelasticity. This mathematical tool is applied to the results obtained by capillary pressure experiments under low-gravity conditions aboard the International Space Station, for adsorption layers at the hydrocarbon/water interface. Two specific experimental sets of steady-state harmonic oscillations of interfacial area are reported, respectively: a drop of pure water into a Span-80 surfactant/paraffin-oil matrix and a pure n-hexane drop into a C13DMPO/TTAB mixed surfactants/aqueous-solution matrix. The fractional constitutive single-FMM is demonstrated to embrace the standard Maxwell model (MM) and the Lucassen–van-den-Tempel model (L–vdT), as particular cases. The single-FMM adequately fits the Span-80/paraffin-oil observed results, correctly predicting the frequency dependence of the complex viscoelastic modulus and the inherent phase-shift angle. In contrast, the single-FMM appears as a scarcely adequate tool to fit the observed behavior of the mixed-adsorption surfactants for the C13DMPO/TTAB/aqueous solution matrix (despite the single-FMM satisfactorily comparing to the phenomenology of the sole complex viscoelastic modulus). Further speculations are envisaged in order to devise combined FMM as rational guidance to interpret the properties and the interfacial structure of complex mixed surfactant adsorption systems.
Giuseppe Loglio; Volodymyr I. Kovalchuk; Alexey G. Bykov; Michele Ferrari; Jürgen Krägel; Libero Liggieri; Reinhard Miller; Boris A. Noskov; Piero Pandolfini; Francesca Ravera; Eva Santini. Interfacial Dilational Viscoelasticity of Adsorption Layers at the Hydrocarbon/Water Interface: The Fractional Maxwell Model. Colloids and Interfaces 2019, 3, 66 .
AMA StyleGiuseppe Loglio, Volodymyr I. Kovalchuk, Alexey G. Bykov, Michele Ferrari, Jürgen Krägel, Libero Liggieri, Reinhard Miller, Boris A. Noskov, Piero Pandolfini, Francesca Ravera, Eva Santini. Interfacial Dilational Viscoelasticity of Adsorption Layers at the Hydrocarbon/Water Interface: The Fractional Maxwell Model. Colloids and Interfaces. 2019; 3 (4):66.
Chicago/Turabian StyleGiuseppe Loglio; Volodymyr I. Kovalchuk; Alexey G. Bykov; Michele Ferrari; Jürgen Krägel; Libero Liggieri; Reinhard Miller; Boris A. Noskov; Piero Pandolfini; Francesca Ravera; Eva Santini. 2019. "Interfacial Dilational Viscoelasticity of Adsorption Layers at the Hydrocarbon/Water Interface: The Fractional Maxwell Model." Colloids and Interfaces 3, no. 4: 66.
The influence of different surface properties holding to a modification of the substrate towards hydrophobic or superhydrophobic behavior was reviewed in this paper. Cell adhesion, their communication, and proliferation can be strongly manipulated, acting on interfacial relationship involving stiffness, surface charge, surface chemistry, roughness, or wettability. All these features can play mutual roles in determining the final properties of biomedical applications ranging from fabrics to cell biology devices. The focus of this work is the mammalian cell viability in contact with moderate to highly water repellent coatings or materials and also in combination with hydrophilic areas for more specific application. Few case studies illustrate a range of examples in which these surface properties and design can be fruitfully matched to the specific aim.
Michele Ferrari; Francesca Cirisano; M. Carmen Morán. Mammalian Cell Behavior on Hydrophobic Substrates: Influence of Surface Properties. Colloids and Interfaces 2019, 3, 48 .
AMA StyleMichele Ferrari, Francesca Cirisano, M. Carmen Morán. Mammalian Cell Behavior on Hydrophobic Substrates: Influence of Surface Properties. Colloids and Interfaces. 2019; 3 (2):48.
Chicago/Turabian StyleMichele Ferrari; Francesca Cirisano; M. Carmen Morán. 2019. "Mammalian Cell Behavior on Hydrophobic Substrates: Influence of Surface Properties." Colloids and Interfaces 3, no. 2: 48.
Recyclable materials can be referred to as both those materials directly recycled from wastes and those derived from any kind of transformation before use. Highly water repellent coatings with wettability properties, known as superhydrophobic (SH), are related to surfaces with contact angles above 150° and a very small hysteresis. The small area available for these surfaces when in contact with water can be exploited in many applications in which interactions with an aqueous environment are usually desirable to be avoided, like for protection and friction reduction in a marine environment. SH coatings under investigation have been prepared starting from recyclable materials with the aim to provide a sustainable and low cost solution, with potential application to large surfaces in a marine environment. Wetting studies, surface characterization, and electrochemical tests show how these surfaces can be used in terms of fouling prevention and the protection of metals in underwater conditions.
Michele Ferrari; Alessandro Benedetti; Francesca Cirisano. Superhydrophobic Coatings from Recyclable Materials for Protection in a Real Sea Environment. Coatings 2019, 9, 303 .
AMA StyleMichele Ferrari, Alessandro Benedetti, Francesca Cirisano. Superhydrophobic Coatings from Recyclable Materials for Protection in a Real Sea Environment. Coatings. 2019; 9 (5):303.
Chicago/Turabian StyleMichele Ferrari; Alessandro Benedetti; Francesca Cirisano. 2019. "Superhydrophobic Coatings from Recyclable Materials for Protection in a Real Sea Environment." Coatings 9, no. 5: 303.
Surface properties like hydrophobicity and morphology of the substrate are essential for cell proliferation affecting its growth, survival and also for its communication with other cells on fabrics. The combination of low surface energy and a specific surface morphology (micro/nano-roughness) leads to significantly less wettable surfaces, known as superhydrophobic characterized by high contact angle above 150° and a very small hysteresis. Such high water repellent coatings feature small area available to be exploited in many applications where interactions with aqueous environment are strongly to be avoided. In this work, the authors have investigated the influence of coating polyester fabric at different degree of hydrophobicity by mixed organic-inorganic coating with moderated to highly water repellence. Depending on the coating composition and structure, the hydrophobicity of the fabric can be finely modulated by an easy-to-prepare method applicable to commercial, low cost fabric substrates providing advanced performance. In vitro experiments have been performed in order to establish the influence of surface modification on adhesion of representative model mammalian cell lines such as 3T3 fibroblasts, HaCaT keratinocytes and HeLa epithelial carcinoma cells. The obtained results suggested that, in addition to the chemistry and morphology of the coating, the characteristics of the substrate are important parameters on the final cell viabilities.
M. Carmen Morán; Guillem Ruano; Francesca Cirisano; Michele Ferrari. Mammalian cell viability on hydrophobic and superhydrophobic fabrics. Materials Science and Engineering: C 2019, 99, 241 -247.
AMA StyleM. Carmen Morán, Guillem Ruano, Francesca Cirisano, Michele Ferrari. Mammalian cell viability on hydrophobic and superhydrophobic fabrics. Materials Science and Engineering: C. 2019; 99 ():241-247.
Chicago/Turabian StyleM. Carmen Morán; Guillem Ruano; Francesca Cirisano; Michele Ferrari. 2019. "Mammalian cell viability on hydrophobic and superhydrophobic fabrics." Materials Science and Engineering: C 99, no. : 241-247.
Capillary pressure experiments are performed in microgravity conditions on board the International Space Station to quantify the dynamic interfacial behavior of mixed adsorption layers of TTAB and C13DMPO at the water/hexane interface. While the non-ionic surfactant C13DMPO is soluble in both bulk phases, water and hexane, the cationic surfactant TTAB is only soluble in the aqueous phase. The interfacial layer is thus formed by TTAB molecules adsorbing from the aqueous phase while the C13DMPO molecules adsorb from the aqueous phase, and transfer partially into the hexane phase until both the equilibrium of adsorption and the distribution between the two adjacent liquid phases is established. The experimental constrains as well as all possible influencing parameters, such as interfacial and bulk phase compressibility, interfacial curvature, calibration of pressure and absolute geometry size, are discussed in detail. The experimental results in terms of the dilational interfacial viscoelasticity of the mixed adsorption layers in a wide range of oscillation frequencies show that the existing theoretical background had to be extended in order to consider the effect of transfer of the non-ionic surfactant across the interface, and the curvature of the water/hexane interface. A good qualitative agreement between theory and experiment was obtained, however, for a quantitative comparison, additional accurate information on the adsorption isotherms and diffusion coefficients of the two studied surfactants in water and hexane, alone and in a mixed system, are required.
Giuseppe Loglio; Volodymyr I. Kovalchuk; Alexey G. Bykov; Michele Ferrari; Jürgen Krägel; Libero Liggieri; Reinhard Miller; Boris A. Noskov; Piero Pandolfini; Francesca Ravera; Eva Santini. Dynamic Properties of Mixed Cationic/Nonionic Adsorbed Layers at the N-Hexane/Water Interface: Capillary Pressure Experiments Under Low Gravity Conditions. Colloids and Interfaces 2018, 2, 53 .
AMA StyleGiuseppe Loglio, Volodymyr I. Kovalchuk, Alexey G. Bykov, Michele Ferrari, Jürgen Krägel, Libero Liggieri, Reinhard Miller, Boris A. Noskov, Piero Pandolfini, Francesca Ravera, Eva Santini. Dynamic Properties of Mixed Cationic/Nonionic Adsorbed Layers at the N-Hexane/Water Interface: Capillary Pressure Experiments Under Low Gravity Conditions. Colloids and Interfaces. 2018; 2 (4):53.
Chicago/Turabian StyleGiuseppe Loglio; Volodymyr I. Kovalchuk; Alexey G. Bykov; Michele Ferrari; Jürgen Krägel; Libero Liggieri; Reinhard Miller; Boris A. Noskov; Piero Pandolfini; Francesca Ravera; Eva Santini. 2018. "Dynamic Properties of Mixed Cationic/Nonionic Adsorbed Layers at the N-Hexane/Water Interface: Capillary Pressure Experiments Under Low Gravity Conditions." Colloids and Interfaces 2, no. 4: 53.
Michele Ferrari; Francesca Cirisano. Hydrophobicity and Superhydrophobicity in Fouling Prevention in Sea Environment. Advances in Contact Angle, Wettability and Adhesion 2018, 241 -265.
AMA StyleMichele Ferrari, Francesca Cirisano. Hydrophobicity and Superhydrophobicity in Fouling Prevention in Sea Environment. Advances in Contact Angle, Wettability and Adhesion. 2018; ():241-265.
Chicago/Turabian StyleMichele Ferrari; Francesca Cirisano. 2018. "Hydrophobicity and Superhydrophobicity in Fouling Prevention in Sea Environment." Advances in Contact Angle, Wettability and Adhesion , no. : 241-265.
Superhydrophobic coating technology is regarded as an attractive possibility for the protection of materials in a sea environment. DC techniques are a useful tool to characterize metals' behavior in seawater in the presence/absence of coatings and/or corrosion inhibitors. In this work, investigations concerning Al-5%Mg alloy with and without a sprayed superhydrophobic coating were carried out with potentiodynamic scans in photobiologically active and not active seawater (3 weeks of immersion). In not photobiologically active seawater, the presence of the superhydrophobic coating did not prevent pitting corrosion. With time, the coating underwent local exfoliations, but intact areas still preserved superhydrophobicity. In photobiologically active seawater, on samples without the superhydrophobic coating (controls) pitting was inhibited, probably due to the adsorption of organic compounds produced by the photobiological activity. After 3 weeks of immersion, the surface of the coating became hydrophilic due to diatom coverage. As suggested by intermediate observations, the surface below the diatom layer is suspected of having lost its superhydrophobicity due to early stages of biofouling processes (organic molecule adsorption and diatom attachment/gliding). Polarization curves also revealed that the metal below the coating underwent corrosion inhibiting phenomena as observed in controls, likely due to the permeation of organic molecules through the coating. Hence, the initial biofouling stages (days) occurring in photobiologically active seawater can both accelerate the loss of superhydrophobicity of coatings and promote corrosion inhibition on the underlying metal. Finally, time durability of superhydrophobic surfaces in real seawater still remains the main challenge for applications, where the early stages of immersion are demonstrated to be of crucial importance.
Alessandro Benedetti; Francesca Cirisano; Marina Delucchi; Marco Faimali; Michele Ferrari. Potentiodynamic study of Al–Mg alloy with superhydrophobic coating in photobiologically active/not active natural seawater. Colloids and Surfaces B: Biointerfaces 2016, 137, 167 -175.
AMA StyleAlessandro Benedetti, Francesca Cirisano, Marina Delucchi, Marco Faimali, Michele Ferrari. Potentiodynamic study of Al–Mg alloy with superhydrophobic coating in photobiologically active/not active natural seawater. Colloids and Surfaces B: Biointerfaces. 2016; 137 ():167-175.
Chicago/Turabian StyleAlessandro Benedetti; Francesca Cirisano; Marina Delucchi; Marco Faimali; Michele Ferrari. 2016. "Potentiodynamic study of Al–Mg alloy with superhydrophobic coating in photobiologically active/not active natural seawater." Colloids and Surfaces B: Biointerfaces 137, no. : 167-175.
The incorporation of silica nanoparticles (NPs) from the subphase into Langmuir lipid monolayers formed by three components, 1,2-Dipalmitoyl-sn-glycerol-3-phosphocholine (DPPC), 1,2-Dioleoyl-sn-glycero-3-phosphocholine (DOPC) and Cholesterol (Chol), modifies the thermodynamic and rheological behavior, as well as the structure of the pristine lipid film. Thus, the combination of structural characterization techniques, such as Brewster Angle Microscopy (BAM) and Atomic Force Microscopy (AFM), with interfacial thermodynamic and dilational rheology studies has allowed us to deepen on the physico-chemical bases governing the interaction between lipid molecules and NPs. The penetration of NPs driven by the interaction (electrostatic or hydrogen bonds) with the polar groups of the lipid molecules affects the phase behaviour (surface pressure-area, П-A , isotherm) of the monolayer. This can be easily rationalized considering the modification of the packing and cohesion of the molecules at the interface as revealed BAM and AFM images. Furthermore, oscillatory barrier experiments have allowed obtaining information related to the effect of NPs on the monolayer response under dynamic conditions that presents a critical impact on the characterization of biological relevant systems because most of the processes of interest for these systems present a dynamic character.
Eduardo Guzmán; Michele Ferrari; Eva Santini; Libero Liggieri; Francesca Ravera. Effect of silica nanoparticles on the interfacial properties of a canonical lipid mixture. Colloids and Surfaces B: Biointerfaces 2015, 136, 971 -980.
AMA StyleEduardo Guzmán, Michele Ferrari, Eva Santini, Libero Liggieri, Francesca Ravera. Effect of silica nanoparticles on the interfacial properties of a canonical lipid mixture. Colloids and Surfaces B: Biointerfaces. 2015; 136 ():971-980.
Chicago/Turabian StyleEduardo Guzmán; Michele Ferrari; Eva Santini; Libero Liggieri; Francesca Ravera. 2015. "Effect of silica nanoparticles on the interfacial properties of a canonical lipid mixture." Colloids and Surfaces B: Biointerfaces 136, no. : 971-980.
Andra Dinache; Mihai Boni; Tatiana Alexandru; Elena Radu; Alexandru Stoicu; Ionut R. Andrei; Angela Staicu; Libero Liggieri; Viorel Nastasa; Mihail Lucian Pascu; Michele Ferrari. Surface properties of Vancomycin after interaction with laser beams. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2015, 480, 328 -335.
AMA StyleAndra Dinache, Mihai Boni, Tatiana Alexandru, Elena Radu, Alexandru Stoicu, Ionut R. Andrei, Angela Staicu, Libero Liggieri, Viorel Nastasa, Mihail Lucian Pascu, Michele Ferrari. Surface properties of Vancomycin after interaction with laser beams. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2015; 480 ():328-335.
Chicago/Turabian StyleAndra Dinache; Mihai Boni; Tatiana Alexandru; Elena Radu; Alexandru Stoicu; Ionut R. Andrei; Angela Staicu; Libero Liggieri; Viorel Nastasa; Mihail Lucian Pascu; Michele Ferrari. 2015. "Surface properties of Vancomycin after interaction with laser beams." Colloids and Surfaces A: Physicochemical and Engineering Aspects 480, no. : 328-335.
Michele Ferrari; Alessandro Benedetti; Eva Santini; Francesca Ravera; Libero Liggieri; Eduardo Guzman; Francesca Cirisano. Biofouling control by superhydrophobic surfaces in shallow euphotic seawater. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2015, 480, 369 -375.
AMA StyleMichele Ferrari, Alessandro Benedetti, Eva Santini, Francesca Ravera, Libero Liggieri, Eduardo Guzman, Francesca Cirisano. Biofouling control by superhydrophobic surfaces in shallow euphotic seawater. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2015; 480 ():369-375.
Chicago/Turabian StyleMichele Ferrari; Alessandro Benedetti; Eva Santini; Francesca Ravera; Libero Liggieri; Eduardo Guzman; Francesca Cirisano. 2015. "Biofouling control by superhydrophobic surfaces in shallow euphotic seawater." Colloids and Surfaces A: Physicochemical and Engineering Aspects 480, no. : 369-375.
Eduardo Guzman; Eva Santini; Michele Ferrari; Libero Liggieri; Francesca Ravera. Interfacial Properties of Mixed DPPC–Hydrophobic Fumed Silica Nanoparticle Layers. The Journal of Physical Chemistry C 2015, 119, 21024 -21034.
AMA StyleEduardo Guzman, Eva Santini, Michele Ferrari, Libero Liggieri, Francesca Ravera. Interfacial Properties of Mixed DPPC–Hydrophobic Fumed Silica Nanoparticle Layers. The Journal of Physical Chemistry C. 2015; 119 (36):21024-21034.
Chicago/Turabian StyleEduardo Guzman; Eva Santini; Michele Ferrari; Libero Liggieri; Francesca Ravera. 2015. "Interfacial Properties of Mixed DPPC–Hydrophobic Fumed Silica Nanoparticle Layers." The Journal of Physical Chemistry C 119, no. 36: 21024-21034.
Technological fields in which seawater is implied are numerorus, working in seawater (shipping, oil industry, marine aquaculture,..), and exploiting seawater in plants (cooling heat-exchange, desalination, power plants,..). All suffer from detrimental effects induced by biofouling mainly enhancing material failures and limiting energetic efficiencies. Among the remediation solutions, technologies coniugating economical, green and efficiency criteria should represent the direction. With the aim to meet these criteria, superhydrophobic (SH) technology attracted many researches for the protection of materials operating in contact with seawater.In this work, the literature focusing on such technology for the protection of surfaces in contact with seawater has been reviewed, mainly focusing on boat and ship hull protection.Despite the growing interest around SH technology in seawater for fouling control and friction drag reduction of hulls, to date literature shows that superhydrophobicity in seawater is still limited if compared with a time window compatible with technological needs (set on years). An evaluation of the causes of early superhydrophobicity loss under operative conditions clearly indicates that, to the best of present knowledge, a SH surface cannot preserve this feature by itself alone (especially in real seawater). Hence, we have considered to highlight the behaviour of SH surfaces in seawater in relation to early stages of biocolonization (conditioning film and pioneering bioslime formation). Considering the annual costs sustained for the biofouling impact control, advantages coming from SH surfaces, in terms of foul control and friction drag reduction, would allow economical savings allowing to cover both the appliance of longevity keeping strategies of the SH surfaces and investments in green technologies of SH coating life cycle (production, storing). In addition a brief outlook is provided on technological fields exploiting seawater in pipelines (power and desalination plants), where the SH surface finishing finds potentially interesting application for fouling and corrosion prevention applications.
Michele Ferrari; Alessandro Benedetti. Superhydrophobic surfaces for applications in seawater. Advances in Colloid and Interface Science 2015, 222, 291 -304.
AMA StyleMichele Ferrari, Alessandro Benedetti. Superhydrophobic surfaces for applications in seawater. Advances in Colloid and Interface Science. 2015; 222 ():291-304.
Chicago/Turabian StyleMichele Ferrari; Alessandro Benedetti. 2015. "Superhydrophobic surfaces for applications in seawater." Advances in Colloid and Interface Science 222, no. : 291-304.
An experimental study is here presented on the properties of aqueous dispersions containing carbon nanoparticles and different ionic surfactants which can modify the degree of hydrophobicity/philicity of particles favoring their transfer from the dispersion bulk to the interfacial layer. Aim of this work is to understand the particle-surfactant and particle-fluid interface interactions and their effect on those macroscopic surface properties of the mixed systems which are expected related to the stability and structure of the respective particle stabilized foams. To this purpose a systematic characterization of dispersions have been carried out, based on surface tension measurement against the surfactant concentration, using a drop Profile Analysis Tensiometer (PAT). These results have been crossed with the characterization of the bulk dispersion by Dynamic Light Scattering (DLS) and ζ-potential measurements to check the effects of surfactant on the particle aggregation and on the particle surface charge, respectively. The stability of the foams obtained with the same compositions has been also investigated and correlated to the other surface and bulk properties.
Dominika Zabiegaj; Eva Santini; Eduardo Guzmán; Michele Ferrari; Libero Liggieri; Francesca Ravera. Carbon Soot-Ionic Surfactant Mixed Layers at Water/Air Interfaces. Journal of Nanoscience and Nanotechnology 2015, 15, 3618 -3625.
AMA StyleDominika Zabiegaj, Eva Santini, Eduardo Guzmán, Michele Ferrari, Libero Liggieri, Francesca Ravera. Carbon Soot-Ionic Surfactant Mixed Layers at Water/Air Interfaces. Journal of Nanoscience and Nanotechnology. 2015; 15 (5):3618-3625.
Chicago/Turabian StyleDominika Zabiegaj; Eva Santini; Eduardo Guzmán; Michele Ferrari; Libero Liggieri; Francesca Ravera. 2015. "Carbon Soot-Ionic Surfactant Mixed Layers at Water/Air Interfaces." Journal of Nanoscience and Nanotechnology 15, no. 5: 3618-3625.