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Registration Number

0223U000861, 0122U001304 , R & D reports

Title

Functional nanostructures for sensors and environmental technology created by self-organization and thermal modification of film systems

Head

Dukarov Serhii V., Кандидат фізико-математичних наук

Registration Date

20-01-2023

Organization

V.N. Karazin Kharkiv National University

Description

 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

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popup.authors

Bohatyrenko Serhii I.
Grib Olexander M
Dukarov Serhii V.
Petrushenko Serhii Ivanovich