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Information × Registration Number 0219U004984, 0115U001417 , R & D reports Title Forming new optical and electronic properties of the nanostructures under high pressure and laser radiation with rare earth ions as probes popup.stage_title Head Pashkevich Yurii G., Доктор фізико-математичних наук Registration Date 26-12-2019 Organization Dоnetsk Institute for Physics and Engineering named after O.O.Galkin of the NAS of Ukraine popup.description2 It was shown that pulsed laser annealing of ultrafine diamond doped with carbon nitride leads to the formation of onion-shaped nanographites with the nanodiamond core at room temperature. The proposed method is much more efficient than the standard method for producing onion-shaped nanographites at temperatures around 2500 ° C in an inert atmosphere. It has been established that hybrid (Eu @ CNx) luminescent nanodiamonds exhibit unique properties in terms of luminescence intensity. The method of the modified crystal field theory has been improved, in which the contribution of 4fn-15d1 configurations is taken into account. The method allows you to simulate the change in the intensity of the luminescence spectra of ions, depending on their location near the surface of the nanoparticles, as well as in the presence of vacancies in the coordination complex. It was found that the luminescence spectra of MgAl2O4: Sm3 + spinel nanoparticles are formed as a result of the joint emission of several types of coordination complexes, with maximum emission from the complex, corresponding to the location of the samarium ion on the surface of the nanoparticle. It was shown that spinel nanoparticles with sizes of about 5 nm show the most intense luminescence, while surface segregation in nanocrystals of large 10 nm with a concentration of 1.0 wt.% And 1.5 wt.% Sm3 + ions leads to quenching of luminescence. Product Description popup.authors Бабкін Р.Ю. Вягін О.Г. Даніленко І.А. Ламонова К.В. Прудніков А.М. Шевцова Т.М. popup.nrat_date 2020-04-02 Close