1
Fryazino Branch
of Kotelnikov Institute of Radioengineering and Electronics of Russian Academy
of Sciences, Vvedensky Sq.1, Fryazino Moscow region 141190, Russia
2 Moscow
Institute of Physics and Technology (State University), 9 Institutskiy per.,
Dolgoprudny, Moscow Region, 141701, Russian Federation
The
paper is received on February 12, 2019
Abstract. Experimental work on a novel
method for the study of the surface properties of lipid monolayers is reported,
based on recording the wavelength and attenuation of surface acoustic waves so
permitting the determination of both the surface tension and surface viscosity
of a monolayer. The capillary wave acts as a measuring probe for determining
monolayer properties. Measurements on L-α-lecithin monolayers indicate that the
acoustic wave method is an effective tool for investigating surface properties
of lipid monolayers exposed to microwaves. Knowledge of the surface properties
of lipid monolayers also allows the determination of their energetic and
mechanical parameters and also the area of single molecules bounding a
monolayer. These parameters are important for understanding the structure and
function of lipid bilayers in biological entities allowing investigation of
both the characteristic features of the structure and the functioning of
biomembranes under various pathological conditions thereby yielding an
additional option for rapidly obtaining diagnostic data so facilitating the
identification of many diseases in their early stages. Capillary wave recording
has been used in a series of experiments and preliminary results of these indicate
a decrease in the surface tension of the sample by an average of 5% over the
entire range of lipid concentrations.
Key words:
capillary wave
generation method, surface properties of lipid monolayers, pulmonary
surfactant, models of biological membranes, wavelength and attenuation of
surface waves,
microwave irradiation.
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