Registration Number
0226U003296,
(0124U000826)
, R & D reports
Title
Nanoarchitectonics, physical and technological research and creation of anti-reflective materials
popup.stage_title
Опрацювання умов синтезу впорядкованих нанопористих структур ААО в широких межах діаметру пор. Оптимізація технологічних умов створення об'ємних і порошкоподібних композитних матеріалів.
Head
Andrushchak Anatolii S., Доктор технічних наук
Registration Date
26-03-2026
Organization
Lviv Polytechnic National University
popup.description1
The goal of the project is to carry out a complex of works on the design and creation of materials with a low (~1-2%) reflection coefficient in the infrared region of the spectrum
popup.description2
A plan for the assembly and technological design of a laboratory for the electrochemical synthesis of AAO membranes with different diameters and pore geometry has been implemented. AAO membranes are manufactured by electrolytic passivation of thin (0.2–1 mm) sheets of high-purity aluminum in an acidic solution. By changing the anodizing modes, it is possible to obtain AAO with different characteristics and properties. The type of anodic oxide film formed on the aluminum surface depends on many factors, the most important of which is the type of electrolyte. Orthophosphoric acid is most widely used as an electrolyte. It dissolves AAO, but not completely, only partially. For better pore alignment, aluminum is annealed at 500°C. The diameter of the pores on the membranes depends on the parameters of the anodizing process. The solution used has the main influence on the initial pore diameter, while the applied voltage determines the pore size. The anodizing time affects the thickness of the AAO layer.
Crystalline nanocomposites with specific anisotropy were synthesized on porous AAO and Si membranes from saturated aqueous solutions of ADP, KB5, and other compounds based on the improvement and optimization of growth processes. We also used methods for growing Si:Bi12GeO20 and Si:LiNbO3 nanocrystals from a high-temperature (>900°C) melt. X-ray structural analysis and micro-Raman studies of all synthesized samples, in particular AAO:ADP, Si:Bi12GeO20, Si:LiNbO3, and others, confirmed the formation of nanocrystals of the specified material introduced into the thickness of AAO and Si matrices.
Spectral studies of matrix and powder materials of AAO, Si, bonding materials, filling materials ADP, KDP, LiNbO3, and others, as well as composite materials based on the above components, were conducted in the IR region of the spectrum from 1 to 25 μm. Significant transparency of AAO matrices and bonding materials in the IR range was revealed.
Product Description
popup.authors
Roman Nebesnyi
Yaroslav Shchur
Volodymyr Adamiv
Roksoliana Bukliv
Volodymyr Hladun
Roman Shvets
Dmytro Vynnyk
Denys Afanasiev
Ihor Tesliuk
Andrii Ratych
Andrii Danylov
popup.nrat_date
2026-03-26
