Functional nanostructures for sensors and environmental technology created by self-organization and thermal modification of film systems
Dukarov Serhii V., Кандидат фізико-математичних наук
V.N. Karazin Kharkiv National University
The completed step is part of an application project whose ultimate goal is to improve
device structures based on oxide semiconductors. Such layers can be used in the field of infrared
radiation detection. Their functional properties can be improved by creating arrays of binary alloy
nanoparticles on the surface.
The processes of phase equilibrium and morphological evolution of Bi-Sn and In-Sn binary
systems were studied. These systems are components of promising lead-free solders and means for
modification of functional structures. It has been shown that diffusion processes in thin films
rapidly homogenize them in thickness. At that time the initial concentration gradients in the
substrate plane are practically preserved. The physical processes responsible for the visualization of
the main contours of phase diagrams in the method of alternating state and alternating composition
are proposed. The promising use of thermal dispersion of binary films to create multifunctional
arrays is shown. It has been established that pore formation in continuous binary films is
accompanied by a local disturbance of the homogeneity of its composition. It is shown that the
complex structures, which form as a result of melting of a binary alloy on the surface of another
metal, are caused both by peculiarities of the melt spreading on the surface of a polycrystalline
substrate and by simplification of mass transfer of a more refractory component in the presence of a
liquid phase. It is shown that the wetting of the copper layer by the Bi-Sn melt in a wide
concentration range actually does not depend on the composition of the fusible melt.
The results of the research can be used by scientific institutions engaged in research aimed at
the development of technologies of microsize soldering with lead-free solders, modification of
functional structures by arrays of binary particles. In particular, the results are important for the
development of infrared radiation sensors, and the study of
Bohatyrenko Serhii I.
Grib Olexander M
Dukarov Serhii V.
Petrushenko Serhii Ivanovich
Head: Dukarov Serhii V.. Functional nanostructures for sensors and environmental technology created by self-organization and thermal modification of film systems.
V.N. Karazin Kharkiv National University. № 0223U000861