Індекс рубрикатора НБУВ: Р410-3

Рубрики:

Хвороби систем кровообігу і лімфообігу

Шифр НБУВ: Ж21341/а Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: Р410.1-5

Рубрики:

Хвороби серця

Шифр НБУВ: Ж21341/а Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: Р410.130.40-3

Рубрики:

Міокардіодистрофія

Шифр НБУВ: Ж21341/а Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: Р410.13

Рубрики:

Хвороби міокарда

Шифр НБУВ: Ж21341/а Пошук видання у каталогах НБУВ 

The nanocomposite - nanoporous silica (SBA-16) containing ZnO quantum dots - was fabricated by the sublimation method. This novel route of synthesizing ZnO nanoparticles implies physical sorption of zinc acetylacetonate precursor into the matrix pores from the gaseous phase, hydrolysis of the precursor, and thermal decomposition of the product with formation of ZnO nanoclusters directly inside the pores. The nanocomposite was characterized by XRD, nitrogen adsorption-desorption isotherms, and photoluminescence spectroscopy methods. We observed the blue shift of the ultraviolet luminescence of nanocomposite as compared to the luminescence of ZnO nanopowder as well as the decrease of the linewidth of the ultraviolet luminescence line, which points to the encapsulation of ZnO nanoparticles in the silica pores and narrowing of their size distribution.

ZnO/porous silica nanocomposites were successfully fabricated by three different types of synthesis techniques. In all cases, the molecular sieve SBA-16 was used as a porous matrix. The in situ growth the nanoparticles of zinc oxide within the matrix pores was done using either gaseous or liquid precursors. The ex-situ method implied growing of nanoparticles in a colloidal solution with further penetration of the ripened ZnO nanoparticles into the pores of the matrix. Physico-chemical studies of the synthesized ZnO/porous silica nanocomposites showed that the introduction of zinc oxide by any of the methods did not lead to destruction of the structure of the molecular matrix SBA-16. The structure of ZnO nanoparticles, on the contrary, was strongly dependent on the growing method. The best defectless ZnO nanoparticles were obtained by in situ growing using gaseous precursors.