Thin SnO 2– x layers, 30 nm in thickness, are produced by the thermal oxidation of metal tin nanolayers at a temperature of 450–750°C. The electrical and optical properties of the layers are studied. During the thermal oxidation of tin nanolayers, an unsteady variation in their conductivity is observed. For the oxide films produced at 450 and 550°C, an absorption band at 340 nm (3.65 eV) is detected in the optical spectra. The conductivity-activation energy is determined for samples oxidized to different degrees. On the basis of experimental data and the data reported in publications, an oxidation mechanism controlling the properties of Sn nanolayers is proposed.

Wire-like SnO 2 micro- and nanocrystals prepared by gas-transport synthesis have been studied by X-ray photoelectron spectroscopy and X-ray absorption near edge structure spectroscopy with the use of synchrotron radiation. It has been found that the heat treatment in ultrahigh vacuum affects the surface state and the vacancy formation in surface layers of the wire-like crystals.

Wire-like micro- and nanocrystals of SnO2 are obtained via gas-transport synthesis. The specifics of the atomic and electronic structure of an array of SnO2 wire-like crystals is revealed using near-edge X-ray absorption and X-ray photoelectron spectra. The method of photoemission electron microscopy with high-intensity synchrotron (undulator) radiation is used to study the morphology of SnO2 wire-like crystals for the first time.

Нитевидные микро- и нанокристаллы SnO2 были получены методом газотранспортного синтеза. Обнаружены особенности атомного и электронного строения массива нитевидных кристаллов SnO2, проявляющиеся в спектрах края рентгеновского поглощения XANES и рентгеновских фотоэлектронных спектрах XPS. Впервые метод фотоэмиссионной электронной микроскопии с использованием высокоинтенсивного синхротронного (ондуляторного) излучения применяется для изучения морфологии нитевидных кристаллов SnO2.

The morphology and phase composition of porous silicon with galvanically deposited Fe and Co particles were investigated by ultrasoft X-ray emission spectroscopy, X-ray absorption near-edge structure spectroscopy, and scanning electron microscopy. It is shown that iron uniformly covers the surface of porous silicon, whereas cobalt penetrates into pores in the form of nanoparticles. It is established that iron is present mainly in the Fe 2 O 3 phase with an admixture of FeO and Fe 3 O 4 . Cobalt forms a mixture of phases of metallic Co and Co 2 O 3 .

Методами USXES, XANES и SEM исследованы морфология и фазовый состав пористого кремния с гальванически осажденными частицами Fe и Co. Показано, что железо равномерно покрывает поверхность пористого кремния, а кобальт проникает в глубь пор в виде наночастиц. Установлено, что железо находится в основном в виде фазы Fe2O3 с примесью FeO и Fe3O4. Кобальт образует смесь фаз металлического Co и Co2O3.