Giuseppe Loglio

Giuseppe Loglio
Italian National Research Council | CNR · CNR-IENI Genoa

Professor

About

195
Publications
10,251
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
5,364
Citations
Citations since 2016
26 Research Items
1861 Citations
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
Additional affiliations
January 2004 - December 2011
Saint Petersburg State University
January 2002 - present
January 2000 - present
Donetsk State Medical University

Publications

Publications (195)
Article
The properties of adsorbed layers of protein fibrils differ significantly from the properties of fibril spread layers on an aqueous subphase. If the dependencies of the dynamic surface elasticity on surface pressure of Lysozyme (LYS) and β-lactoglobulin (BLG) aqueous dispersions proved to be close to the results for native protein solutions, LYS an...
Article
Full-text available
The spread layers of lysozyme (LYS) microgel particles were studied by surface dilational rheology, infrared reflection–absorption spectra, Brewster angle microscopy, atomic force microscopy, and scanning electron microscopy. It is shown that the properties of LYS microgel layers differ significantly from those of ß-lactoglobulin (BLG) microgel lay...
Article
Interfacial rheology of adsorbed layers of surfactants, demonstrating the response of the interface to interfacial deformations, plays a key role in formation and stability of foams and emulsions. It also provides insights into complex surfactant systems in different applications; in particular, medical treatments and diagnostics. The response of t...
Article
This work is directed to the elucidation of the peculiarities of fullerene C60 interactions with bovine serum albumin (BSA) in mixed layers at the water-air interface. To this aim, the dilational surface elasticity was measured as a function of surface pressure and surface age and optical methods together with the atomic force microscopy (AFM) were...
Article
Full-text available
The dynamic and equilibrium properties of adsorption layers of poly (oxyethylene) alkyl ether (CnEOm) can be well described by the reorientation model. In its classical version, it assumes two adsorption states; however, there are obviously surfactants that can adsorb in more than two possible conformations. The experimental data for C14EO4 and C14...
Article
The pulmonary surfactant (PS) is a complex mixture of lipids and proteins dispersed in the aqueous lining layer of the alveolar surface. Such a layer plays a key role in maintaining the proper lung functionality. It acts as a barrier against inhaled particles and pathogens, including viruses, and may represent an important entry point for drugs del...
Article
Full-text available
The adsorption behaviour of linear poly(oxyethylene) alkyl ether (CnEOm) is best described by a reorientation model. Based on a complete set of experimental data, including the adsorption kinetics, the equilibrium surface tension isotherm and the surface dilational visco-elasticity, the thermodynamic and kinetic adsorption parameters for some CnEOm...
Article
The addition of denaturants strongly influences the surface properties of aqueous myoglobin solutions. The effect differs from the results for mixed solutions of the denaturants and other globular proteins, for example, bovine serum albumin (BSA), lysozyme and β-lactoglobulin (BLG), although the surface properties of the solutions of the pure prote...
Article
The dynamic surface properties of solutions of pulmonary surfactant (PS) were investigated at various temperatures and in a broad range of surface tensions. The efficient dynamic surface elasticity was determined for the first time in case when the characteristic adsorption time is comparable with the period of surface area oscillations. The mechan...
Article
Full-text available
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 cationi...
Article
Polydopamine (PDA) films at the air - water interface can be easily obtained in slightly alkaline dopamine solutions using 02 dissolved in water as an oxidant but their insufficient stability limits their applications. In this work PDA films at the water surface were obtained by polymerization of dopamine hydrochloride (DA) by the enzyme laccase in...
Article
The theoretical description of the adsorption of surfactants at interfaces between aqueous solutions and oil was based over a very long time on models derived for the solution/air interface. Thus, most of the experimentally observed peculiarities could not be specifically considered but were merely interpreted in terms of a penetration of oil molec...
Article
The review discusses recent results on the adsorption of amyloid fibrils and protein microgels at liquid/fluid interfaces. The application of the shear and dilational surface rheology, atomic force microscopy and passive particle probe tracking allowed for elucidating characteristic features of the protein aggregate adsorption while some proposed h...
Article
Full-text available
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 Int...
Article
The surface properties of a polydopamine layer at the air-water interface were studied by dilatational surface rheology, ellipsometry and Brewster angle microscopy (BAM). A significant increase of the dynamic surface elasticity was discovered when the concentration changed from 0.75 g/l to 2 g/l with the maximum value of about 60 mN/m at a concentr...
Article
The surface properties of mixed aqueous dispersions of lysozyme and silica nanoparticles were studied using surface-sensitive techniques in order to gain insight into the mechanism of simultaneous adsorption of protein/nanoparticle complexes and free protein as well as the resulting layer morphologies. The properties were first monitored in situ du...
Article
In this work, dynamic surface properties of spread monolayers of DPPC and adsorbed layers of PS solutions were investigated in a broad range of surface pressure. Application of a modified Langmuir trough and a recently developed approach for the analysis of a non-linear response of the adsorption layer to large surface deformations gives a possibil...
Article
Full-text available
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 T...
Article
A new approach to the analysis of nonlinear surface dilational rheological properties was developed with the aim to enlarge the accessible range of surface pressures. The dilational surface elasticity of spread monolayers of DPPC, cholesterol, DMEA and their mixtures was determined in the region of low surface tensions (less than 10 mN/m) correspon...
Article
The interactions between fibrinogen and polyelectrolytes in the surface layer of their mixed solutions were studied by measurements of the dynamic surface tension and surface elasticity as a function of surface age, polyelectrolyte concentration and solution pH. A flexible and negatively charged polyelectrolyte − sodium polystyrolsulfonate (PSS) –...
Article
The dynamic surface properties of mixed monolayers of 1,2-Dipalmitoyl-sn-glycerol-3-phosphocholine (DPPC) and negatively charged polystyrene particles (PS) of different size were investigated with the aim to model the interactions of particles with biointerfaces. Special attention was paid to the aggregation of the particles at the water/air interf...
Article
Measurements by capillary pressure tensiometry, under microgravity conditions aboard the International Space Station, supplied a consistent set of reliable results for the dynamic interfacial tension and for the interfacial dilational viscoelastic modulus, quantitatively characterizing the dynamics of Span-80 adsorbed layers at the paraffin-oil/wat...
Article
The surface properties of the solutions of two derivatives of C60 fullerene with lysine and arginine were investigated by measurements of surface tension, dilational surface rheological properties, characteristics of capillary waves, and by Brewster angle microscopy. It is shown that the adsorption of the derivatives is irreversible and they can fo...
Article
Full-text available
A study of the dilational surface viscoelastic properties of mixed solutions of lysozyme and denaturing agents of different chemical nature allows us to characterize the changes of protein tertiary structure in the surface layer upon adsorption at the liquid–gas interface. We show that guanidine hydrochloride (GuHCl) and urea influence the dynamic...
Article
The dependence of the dilational surface elasticity on the surface pressure of the spread monolayers of polystyrene microparticles is studied at the water-air interface. The surface rheological measurements together with the data from optical methods allow the division of the whole range of surface pressures into three zones characterized by differ...
Article
The interfacial tension response to dilational deformation of interfacial area exhibits a (more or less) nonlinear behavior, depending on the amplitude of the deformation. Studies of such observable interfacial properties in the nonlinear domain suggest valuable information about the two-dimensional microstructure of the interfacial layer, as well...
Article
This short review is devoted to recent achievements in studies of the dilational surface rheological properties of the systems containing complexes of silica nanoparticles with conventional surfactants. It is shown that there is a surfactant concentration range where the dynamic surface elasticity reaches extremely high values up to 1000 mN/m. This...
Article
The dynamic surface elasticity of mixed solutions of bovine serum albumin (BSA) and poly(diallyldimethylammonium chloride) (PDADMAC) was measured as a function of the surface age, polyelectrolyte concentration and solution pH. The addition of polyelectrolyte does not influence the dynamic surface properties of protein solution at pH below the isoel...
Article
The dilational surface rheology is applied to solutions of globular proteins (bovine serum albumin and β-lactoglobulin) in presence of urea. The kinetic dependencies of the dynamic dilational surface elasticity become non-monotonic if the denaturant concentration exceeds a certain critical value indicating the adsorption of unfolded protein molecul...
Article
The presented drop and bubble micro manipulator (DBMM) is a new experimental tool for the quantitative analysis of the interaction between two drops or two bubbles or even between a single drop with a bubble in a liquid medium. For each drop or bubble, a coarse and a very fine dosing system allow controlling their size or changing it in respect to...
Article
Full-text available
The adsorption films of silica nanoparticles modified by a cationic surfactant (cetyltrimethylammonium bromide, CTAB) at the air–water interface were investigated by the dilational surface rheology and optical methods. Special attention was paid to the slow changes of surface properties with the surface age. The surface tension and dynamic dilation...
Article
A new methodology, based on fundamental optical principles relevant to the evanescent wave properties, is developed to evaluate the thinning behavior and the local thickness in different positions for curved aqueous emulsion films, generated in a hydrocarbon matrix. This methodology is applied to test data obtained by a specially-designed bread-boa...
Article
The dynamic surface elasticity of mixed solutions of β-casein and surfactants of different chemical nature was measured as a function of surface age and surfactant concentration with the aim to elucidate the influence of non-ionic interactions between the components on the dynamic surface properties. Small admixtures of the amphiphilic non-ionic po...
Article
The oscillating drop and bubble analyzer (ODBA) is an experimental set-up based on the measurement of capillary pressure under static and dynamic conditions. It allows studies of slow and fast dynamic surface and interfacial tensions, following different growing and oscillating drop or bubble protocols, as well as determination of the dilational in...
Article
Kinetic dependences of the dynamic dilatational surface elasticity of solutions of the complexes of b-lactoglobulin and bovine serum albumin with dodecyltrimethylammonium bromide show that the destruction of the tertiary protein structure and the partial destruction of the secondary structure in the surface layer occur at lower surfactant concentra...
Article
The dynamic dilatational surface elasticity of mixed solutions of globular proteins (β-lactoglobulin (BLG) and bovine serum albumin (BSA)) with cationic (dodecyltrimethylammonium bromide (DTAB)) and anionic (sodium dodecyl sulfate (SDS)) surfactants was measured as a function of the surfactant concentration and surface age. If the cationic surfacta...
Article
Full-text available
Scanning probe microscopy is used to study adsorption films of sodium polystyrenesulfonate/dodecyltrimethylammonium bromide complexes, which are transferred from aqueous solution surfaces to the mica surface by the Langmuir-Blodgett method. It is established that the results obtained at surfactant concentrations below critical micelle concentration...
Article
Recent application of the methods of surface dilational rheology to solutions of the complexes between synthetic polyelectrolytes and oppositely charged surfactants (PSC) gave a possibility to determine some steps of the adsorption layer formation and to discover an abrupt transition connected with the formation of microaggregates at the liquid sur...
Chapter
The general way of characterising the stability of foams or bubbles is the registration of some integral properties, such as the volume of a foam [1] or the creaming in an emulsion [2]. For liquid film studies, however, no direct correlation between film properties and adsorption layer characteristics on one side, or foam/emulsion stability on the...
Chapter
A. Introduction The Drop/Bubble Profile Analysis Tensiometry (PAT) is a well-established technique for determining static and dynamic properties of liquid-gas and liquid-liquid interfacial systems. Specifically, for the determination of interfacial tension, PAT is an accurate measurement method being metrologically based on a fundamental physical p...
Chapter
Measurements of equilibrium and dynamic interfacial tension of liquid interfaces are of great importance for many practical applications. Many technological processes, e.g. involving liquid-liquid extraction, foams and emulsions, liquid metals and alloys, multiphase flows and many others, strongly depend on interfacial tension [1]. Interfacial tens...
Article
Measurements of the surface dilational elasticity close to equilibrium did not indicate significant distinctions in the surface conformation of different forms of bovine serum albumin (BSA) in a broad pH range. At the same time, the protein denaturation in the surface layer under the influence of guanidine hydrochloride led to strong changes in the...
Article
Measurements of the concentration and adsorption time dependencies of the dynamic surface elasticity of mixed polyethylenimine/sodium dodecyl sulfate (PEI/SDS) solutions show transitions between a few states of different surface elasticity. In the range of low surface pressures the elasticity is governed by the branched structure of the macromolecu...
Article
For the characterisation of interfaces between two immiscible liquids, capillary pressure tensiometry is the most versatile method. To measure short time interfacial tensions it has to be applied under very dynamic conditions for which the following protocols have been developed: 1—continuously growing drop (CGD); 2—pre-aged growing drop (PGD); 3—s...
Article
The Capillary Pressure Tensiometry is an effective technique for dilational rheological investigations when it is used according to the oscillating drop/bubble method. This method allows for an indirect determination of the dilational viscoelasticity versus frequency through the acquisition of the pressure signal obtained as response to harmonic pe...
Article
Dilational rheology represents a powerful tool to investigate equilibrium and dynamic properties of simple and more complex interfacial layers containing surfactants, proteins, polymers or micro–nano sized particles. Concerning the experimental techniques for dilational rheology, drop/bubble tensiometers based on the acquisition of the drop/bubble...
Article
For the understanding of short-time adsorption phenomena and high-frequency relaxations at liquid interfaces particular experimental techniques are needed. The most suitable method for respective studies is the capillary pressure tensiometry. However, under gravity conditions there are rather strong limitations, in particular due to convections and...
Article
The dynamic surface properties of mixed solutions of polyacrylic acid (PAA) and alkyltrimethylammonium bromides (CnTAB) were measured by the oscillating ring method as a function of surface age and surfactant concentration. The concentration dependencies of the surface tension and dilational dynamic surface elasticity were similar to the correspond...
Article
Image acquisition and subsampling of periodic high-frequency drop oscillations is presented as an advantageous metrological procedure in capillary pressure tensiometry (CPT). The observation of a finite sequence of single tone or of multiharmonic cycles, subsampled in an expanded time-scale interval, allows the characteristics of the real oscillati...
Article
The dynamic surface dilational elasticity, surface pressure, and adsorbed amount of the mixed solutions of beta-lactoglobulin and guanidine hydrochloride were measured as a function of surface age and denaturant concentration. It was shown that the conformational transition from compact globules to disordered protein molecules in the surface layer...
Article
The dynamic dilational elasticity of adsorption layers of the complexes between polyacids and dodecyltrimethyl ammonium bromide were measured by the oscillating ring method as a function of surface age and surfactant concentration. The concentration dependencies of surface tension and dilational surface elasticity are similar to the corresponding d...
Chapter
The mechanical behaviour of liquid interfaces has a large relevance for many technological and natural processes involving multiphase systems subjected to dynamic conditions. This behaviour is primarily linked to the value of the interfacial tension and to its instantaneous variation under the effect of changes of the available interfacial area, i....
Article
Measurements of the dynamic elasticity of an adsorption film of poly(vinylpyridinium chloride)/sodium dodecylsulfate (PVP/SDS) complexes indicate a structure transition in the film when the surfactant concentration approaches the concentration of PVP monomers and show that the rate of relaxation processes in polyelectrolyte/surfactant adsorption fi...
Article
Detailed construction is presented for a refined instrument designed for the accurate measurement of dynamic interfacial tension, both in the frequency domain and in the time domain, in liquid/gas and in liquid/liquid systems. The instrument is an integrated combination of a profile-analysis tensiometer with a capillary-pressure tensiometer. The me...
Article
In this study the effect of particles of nanometric dimensions on the interfacial properties of liquid–liquid systems is addressed.The nanoparticle transfer and the consequent attachment to the fluid interface are mainly governed by their hydrophobic/lipophilic character. For this reason a model particle–surfactant system has been investigated, nam...
Article
The dilational dynamic surface elasticity of mixed aqueous polyvinylpyridinium chloride/sodium dodecyl sulfate solutions (PVPmCl/SDS) was measured as a function of time and surfactant concentration. This system represents a typical example of polyelectrolyte/surfactant complex formation and subsequent aggregation on the nano-scale. The concentratio...
Article
The dynamic surface elasticity of solutions of β-casein/surfactant mixtures was measured as a function of surface age and surfactant concentration. Small additions of ionic surfactants changed strongly the kinetic dependence of the dynamic surface elasticity of protein solutions. The shape of the kinetic curve depended on the charge of the surfacta...