By small angle X-ray scattering (SAXS) and atomic force microscopy characteristic sizes are determined, structural features of thin iron films deposited by magnetron evaporation onto substrates from pyroceramics are established. It is shown that morphologically the film is characterized by disorder. It is formed from columnar nano crystallites that are oriented either perpendicular to the substrate or situated in its plane, which dictates polydispersity of those coatings. It is shown that SAXS may be thought of as nondestructive technique for analyzing structure and composition and conducting quality control of magnetron films.

Індекс рубрикатора НБУВ: Г562.2

Рубрики:

Водні розчини

Шифр НБУВ: Ж100357 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В379.226 + В379.273

Рубрики:

Тонкі шари напівпровідників

Магнітні властивості напівпровідників

Шифр НБУВ: Ж100357 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В377.34

Рубрики:

Феромагнетизм твердих тіл

Шифр НБУВ: Ж100357 Пошук видання у каталогах НБУВ 

By small angle X-ray scattering (SAXS) investigated the structure of polystyrene matrix composites filled by barium titanate nanoparticles with different volume fraction. Found that the percolation threshold for these systems is about 15 % of the content of the nanoparticles. Estimate the average distance between nanoparticles composites with different volume fraction.

The aqueous dispersion of silver nanoparticles have been obtained and studied by physicochemical methods. Maximum of size nanoparticles distribution in the aqueous dispersion determined by the small angle X-ray scattering technique was 2,5 nm. The composition on the basis of those nanoparticles can be used to create new nanomaterials, in particular for the modification of talc silver nanoparticles. The existence of nanoparticles at the talс surface is corroborated by the data of energy dispersive spectra and by X-ray diffraction spectra.

Індекс рубрикатора НБУВ: В371.212 + В379.247

Рубрики:

Напівпровідникові наноструктури

Спектроскопія напівпровідників

Шифр НБУВ: Ж100357 Пошук видання у каталогах НБУВ 

The article studies ultrasound effect on molecules of sodium dodecyl sulphate (SDS) and on critical micelle concentration (CMC). Ultrasound had no effect on degradation and decomposition of water molecules. Smallangle X-ray scattering was applied to study miscellar solutions of SDS before and after sonication. X-ray spectra were analyzed with an approach which does not take the micelle model into consideration. On ultrasonic treatment, diameter of SDS micelle nucleus decreased from 2,6 to 2,4 nm and of the whole micelle from 6,0 to 4,6 nm. Obtained results were explained on the basis of a hypothesis of micelle dual properties. Ultrasound increases presence of high density liquid (HDL) in a micelle at the cost of low density liquid (LDL).