Registration Number
0222U001585,
0117U002610
, R & D reports
Title
Development and research of new multifunctional materials based on low-dimensional molecular crystals.
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Head
Verbitsky Anatoly B., Кандидат фізико-математичних наук
Registration Date
28-01-2022
Organization
Institute of Physics of National Academy of Sciences of Ukraine
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The aim of the project was to create and systematically study new functional semiconductor molecular systems based on composites and heterostructures that are promising for molecular electronics and can be used to develop photovoltaic cells, organic transistors, sensors etc.
The main problem to be solved by the project is the search for a fundamental understanding of physical processes in complex molecular systems; finding a correlation between the nature of intermolecular interaction and electronic properties of the whole system.
The peculiarities of electronic processes in a number of low - dimensional molecular structures have been studied, in particular, in composites of carbon nanotubes with dyes, LC blue phases of and LC doped with nanoparticles.
For the first time, the formation of J-aggregates on the outer surface of carbon nanotubes with efficient energy transfer from the dye aggregate to the nanotube was observed. The proposed mechanism of aggregation is related to the self-arrangement of cis-isomers of polymethine dye molecules, which have curved π-conjugate groups and adhere well to the convex surface of the nanotube.
The presence of three relaxation paths for symmetric polymethine dyes in the excited state is shown: one symmetric path and two asymmetric paths with different symmetry breaking. The first asymmetric mechanism leads to the polymethine state, and the second to the polyene state. The obtained results provide important knowledge for the design of new ultrafast optoelectronic systems based on the studied materials.
It was found that in thin planar cells, which are filled with LC blue phases of the first type, a hexagonal lattice of half-scyrmions is formed with a thickness less than the lattice constant of blue phase. As the thickness decreases, this lattice transforms into the system of single half-scyrmions.
Possibilities of using the results of work in the development of sensors and elements of molecular electronics have been evaluated.
Product Description
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Boiko Oleksandr Petrovych
Verbitsky Анатолій Borysovych
Vysotska Svitlana Andriivna
Vovk Vladyslav Eduardovych
Gorishnyi Myron Petrovych
Koval’chuk Olexandr Vasyl’jvych
Kostetskyi Anton Olegovych
Manzhara Victor Stepanovych
Nych Andrij Bogdanovych
Ognysta Ulyana Mykhailivna
Piryatinski Yuri Petrovich
Sevryukova Marina Mykhaylivna
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2022-03-09
