Registration Number
0217U002392,
0112U002609
, R & D reports
Title
The investigation of excitonic and electronic processes in molecular composites.
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Head
Kuryk M.V.,
Registration Date
09-02-2017
Organization
Institute of physics NASU
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The features of excitonic and electronic excitations in some actual self-arranged nanomaterials, including carbon nanotubes composites with dyes, lyotropic chromonic liquid crystals (LCLC) and LC colloids. In particular, new photon nanosystem - polymethine dye attached to micelles carbon nanotube - a surfactant in water has been created. Significant (6 times) enhancement of the photoluminescence of chiral carbon nanotubes has been demonstrated in such systems and the mechanism of such enhancement - the formation of molecular excitons in the dye aggregates and resonant energy transfer to the nanotube, was proposed. Direct experimental evidence of a significant improvement in energetic order in LCLC films has obtained, providing good percolation charge transport in these films. A three-dimensional periodic lattice has been created for the first time in nematic colloidal systems and it is shown that the spatial arrangement of the particles corresponding to body centered tetragonal lattice. It was demonstrated that in the applied external electric field the crystal shows a giant electrostriction or turned in the field as a unit, depending on the sign of dielectric anisotropy of liquid crystal matrix. It is shown that melanin molecule monomers form flat nanoclusters with macromolecular disks shapes, which can be identified as chromophores with different length of pi-stacking. Two-dimensional oligomers can later form one-dimensional aggregates with stacking ordering. The study shown that the limit of selective detection of nanotubes is nanograms/ml, providing the possibility to create the rapid sensors of carbon nanoobjects. Also promising for use in sensorics are LCLC, and the first three-dimensional periodic lattice of a nematic colloidal systems are actually the photonic crystal controlled by an electric field that can be used in electronic technique. The recommendations for the use of study results for the development of sensors and components of electronic technique were given.
Product Description
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Бойко Олександр Петрович
Вербицький Анатолій Борисович
Верцімаха Ярослав Іванович
Горішний Мирон Петрович
Курик Михайло Васильович
Луцик Петро Миколайович
Манжара Віктор Степанович
Назаренко Василь Геннадійович
Нич Андрій Богданович
Огниста Уляна Михайлівна
Пирятинський Юрій Петрович
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2020-04-02
