Room-Temperature Reaction between Laser Chemical Vapor Deposited Selenium and Some Metals

Abstract

Laser-chemical vapor deposition (LCVD) of elemental selenium onto the surface of several metals (Ag, Cu, Cd, Zn, Mg, Sn) has been achieved using photolytic decomposition of diethyl selenium, and the interaction between the deposited selenium coatings and the metal surface has been examined by X-ray photoelectron spectroscopy, Raman spectroscopy, X-ray diffraction, and electron microscopy. It is revealed that thin coatings of Se take part in a solid-state chemical reaction with Ag, Cd, Cu, Mg, and Zn substrates and demonstrated for the first time that the reaction between amorphous selenium and these metals (and not only Cu) does not require high temperatures but takes place at room temperature. The results reveal the feasibility of room-temperature selenization of metals.

Mercury Segregation and Diselenide Self-Assembly on Gold

“…Note that a qualitatively similar shift, but of minor amount was also observed for experiments on thiol adsorption on the Hg/Au system . The BE range of observation of Se 3d peaks (53–55 eV) appeared consistent with data in the literature on several compounds containing Hg. − …”

ArF laser photolysis of gaseous CS2–(CH3)4Sn mixtures: gas-phase reaction between tin and sulfur and deposition of nanosized tin sulfides incorporated in a polymer network

“…We point out that the photolytic generation of small clusters of metals and chalcogenides in the gas phase can procure conditions for the chemical vapour deposition of metal chalcogenides at room temperature of the gas phase. Our finding extends our recent report 11 on the room-temperature reaction between some metals and laser-generated selenium.…”

“…There is enormous interest in the synthesis of nanosized metal chalcogenides at low (room) temperatures 11 and ongoing attention is paid to fabrication of semiconductor nanocompo-sites in polymeric networks. 12,13 Nanosized metal chalcogenide particles dispersed within polymer matrices are the subject of ongoing research [14][15][16][17] due to their unique electronic and optical properties and potential applications in solar energy conversion, photoconducting cells and nonlinear optics.…”

Wavelength and Metal Dependence in the Photofragmentation of a Gas-Phase Lanthanide β-Diketonate Complex

“…Photofragmentation of gas-phase metal−organic complexes and the relationship of the fragmentation patterns to the electronic structure of the complexes − have drawn much attention because of their relevance in applying wavelength optimization to laser-assisted chemical-vapor deposition (CVD). − Such studies can also lead to the rational design of new CVD precursor molecules, optimized for the clean, selective deposition of metals and metal binary and ternary compounds. In conventional thermal metal−organic CVD, activation of the precursor is provided by heating the deposition substrate.…”