The transition to the macro- and nanosized elements in semiconductor electronics significantly increases the contribution of the surface layers to physico-chemical properties of materials. In its turn, the surface characteristics are affected, for example, by the adsorption processes from gaseous medium, the interest in which in recent years has significantly increased with the development of catalysis and thin-film electronics. In connection with this studying the process of the oxygen adsorption and of its interaction with the surface of polycrystalline silver is urgent. In the work by in situ methods the surface layers of the polycrystalline silver, subjected to external action by the activated oxygen from various sources, have been investigated. As the activated oxygen sources the water vapors at 1073 K temperature and the ion source, permitting to obtain a beam of the oxygen ions with 100-300 eV (5mcA/cm) energy have been used. It has been found that after processing in the surface and near-surface layers of silver, in addition to atomic oxygen in the composition of AgO and AgO, also, molecular oxygen and silver in zero-valence state had been present. An estimate of the ratio of the intensities of the component peaks of silver and oxygen has made it possible to conclude that there are the associative forms of oxygen in the silver surface layers. An increase in the spin-orbit splitting for Ag 3 d -Ag 3 d has been recorded, indicating the presence of the oxidized nanoparticles on the surface.
1. Ашхотов О.Г., Шебзухов А.А., Хоконов Х.Б. Изучение поверхности жидких металлов и сплавов методом электронной оже-спектроскопии // Доклады Академии наук СССР. – 1984. – Т. 274. – № 6. – С. 1349–1352.
2. Канчев В.В., Просвирин И.П., Бухтияров В.И. Изучение структуры пленок (HfO2)x(Al2O3)1–x/Si методом РФЭС // Журнал структурной химии. – 2011. – Т. 52. – № 3. – С. 495–502.
3. Стадниченко А.И., Кошев С.В., Боронин А.И. Окисление поверхности массивного золота и исследование методом рентгеновской фотоэлектронной спектроскопии состояний кислорода в составе оксидных слоев // Вестник Московского университета. Cер. 2. Химия. – 2007. – Т. 48. – № 6. – С. 418–426.
4. Стадниченко А.И., Сорокин А.М., Боронин А.И. Исследование наноструктурированных пленок оксида меди CuO методами РФЭС, УФЭС и СТМ // Журнал структурной химии. – 2008. – Т. 49. – № 2. – С. 341–347.
5. Han J., Zemlyanov D.Y., Ribeiro F.H. Interaction of O2 with Pd single crystals in the range 1–150 Torr: oxygen dissolution and reaction // Surf. Sci. – 2006. – No. 600. – P. 2752–2761.
6. Heine C., Eren B., Lechner B.A.J., Salmeron M. A study of the O/Ag(111) system with scanning tunneling microscopy and X-ray photoelectron spectroscopy at ambient pressures // Surf. Sci. – 2016. – No. 652. – P. 51–57.
7. Кибис Л.С. Исследование методом фотоэлектронной спектроскопии металлических и окисленных наночастиц серебра и палладия: дис. … канд. хим. наук. – Новосибирск, 2011. – 147 с.
8. Bowker M. Plasma-induced oxidation of Ag(110) // Surf. Sci. – 1985. – Vol. 155. – No. 2–3. – P. L276– L280.
9. Waterhouse G.I.N., Bowmaker G.A., Metson J.B. Oxidation of a polycrystalline silver foil by reaction with ozone //Appl. Surf.Sci. – 2001. – Vol. 183. – No. 3–4. – P. 191–204.
10. Бухтияров В.И., Слинько М.Г. Металлические наносистемы в катализе // Успехи химии. – 2001. – Т.70. – № 2. – C.167–181.