Search academic texts

Information × Registration Number 0218U000249, 0115U001094 , R & D reports Title The processes of monolayers formation and nanophase structuring in glassy matrix of graphene-like two-dimensional arsenic and germanium chalcogenides. popup.stage_title Head Holomb Roman Mychailovich, Registration Date 24-01-2018 Organization State Higher Educational Institution "Uzhgorod National University" popup.description2 The component composition and local atomic environment of as-deposited As2S3, GeS, GeS2 nanolayers, perspective media for photonics and renewable energy technology, were investigated by synchrotron-photoelectron and surface-enhanced Raman spectroscopy. It is shown that secondary thermal treatment leads to the ordering processes in the structure of nanolayers, and their interaction with air causes their partial corrosion by oxidation and carbonization of the surface. It is established that laser irradiation of As2S3 nanolayers in vacuum induces reversible transformations of the surface structure and creates an optically controlled gradient of atomic concentration. On the basis of the conducted topological-cluster modeling and the first-principle calculations of the electronic states of AsnSm and GenSm clusters, the photoluminescence bands of nanolayers are identified. The results of calculations of the vibrational spectra of clusters allowed to establish the structural nature of reversible induced transformations and to analyze the processes of nanoheterophase structuring of As-S and Ge-S nanolayers. Product Description popup.authors . Глебена Мирослава Іванівна Кондрат Олександр Борисович Міца Олександр Володимирович Стронський Олександр Володимирович popup.nrat_date 2020-04-02 Close