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Information × Registration Number 0220U000515, 0116U003192 , R & D reports Title Pecularities of mechanical, electrical and magnetic processes in low-dimensional systems at nanoscales popup.stage_title Head Volkov Sergey N., Доктор фізико-математичних наук Registration Date 24-02-2020 Organization Bogolybov Institute for Theoretical Physics of NASU popup.description2 Within the framework of the project, a two-stage mechanism of threshold deformation in a DNA macromolecule under the action of an external force is proposed. The role of threshold stretching and double helix opening by external force in DNA mechanics is determined. Thus, the appearance of bistability causes a threshold effect of deformation. The project, with the help of numerical experiments, demonstrated the ability to effectively control the parameters of a flexible ferromagnetic tape with the help of an external magnetic field. Recent experimental measurements of the transmission spectrum of single-layer graphene in the far infrared spectra range have shown that the Drude peak width increases by more than 10% over 1% of the applied mechanical deformation, with the Drude peak weight remaining unchanged under these conditions. The strong influence of deformation on the optical absorption of graphene in the terahertz range can be used to create graphene-based optoelectronic devices, such as photodetectors and touch screens. The proven ability to control the optical properties of graphene through mechanical action opens new perspectives for the future applications of this material. During the reporting period, a number of multicomponent nonlinear integrable systems were elaborated and studied, suitable for modeling the excited states of regular low-dimensional objects of both natural and synthetic origin, and formulated the conditions for controlling the dynamics of such states. Among the results that may have the applications is the study of the mechanisms of ion therapy of cancer disease. The hypothesis formulated in the previous works of the authors of the project about the important role of hydrogen peroxide molecules in the treatment of cancer has been confirmed. According to the hypothesis, during irradiation of a biological cell by a stream of high-energy ions, among the products of radiolysis, the highest percentage content is molecules of hydrogen peroxide (H2O2), as the most long-lived products. Blocking atomic groups of nonspecific recognition (phosphate groups), as well as centers of specific recognition (atomic groups of nucleic bases) in the DNA of a biological cell deactivates the genetic apparatus and leads to cell death. Thus, the use of hydrogen peroxide in the treatment of tumors should be considered as an important new mechanism for the treatment of cancer. Within the framework of the given project, an method of molecular dynamics was used to model the interaction of organic counterions - polyamine molecules putrescine2+, spermidine3+ and spermine4+ -- with the DNA double helix to determine the specific places of localization of polyacations on the macromolecule. In order to construct a fundamental model of the transport properties of semiconductor heterostructures, the so-called spin operators, which commute with the Dirac equation, were studied when finding the analytical solutions of the latter. As a result, new and previously unknown conditions were established. The latest Dirac materials can be used as a replacement or supplement to modern microelectronics. Product Description popup.authors Єремко О.О. Єршов К.В. Вахненко О.О. Гайдідей Ю.Б. Здоревський О.О. Каневська П.П. Кравчук В.П. Крячко Є.С. Локтєв В.М. Малишева Л.І. П'ятницький Д.В. Перепелиця С.М. Скрипник Ю.В. Шарапов С.Г. popup.nrat_date 2020-07-03 Close