Nanogravimetric study of lead underpotential deposition on selenium thin films as a semiconductor alloy formation procedure

The general goal of this research is to clarify mechanisms of solid state reactions at the atomic level as a step in the rationalization of macroscopic reaction behavior in solids. A study of intermetallic alloy formation resulting from interdiffusion of metals in thin films can be made by HREM. In this work, reactions between Pt and Sn in thin films are studied to elucidate mechanisms for structural and compositional changes during the interdiffusion process.Thin films of Pt and Sn used in this study were prepared by the two-film method introduced by Shiojiri. Few hundred angstroms of Pt were vacuum-deposited onto holey carbon films mounted on TEM grids. Sn films with an average thickness of 200Å were created by evaporation at rates of 15-30 Å/sec onto air-cleaved KBr substrates. The Sn films were wet-stripped and collected on the holey Pt grids. Figure 1 shows a cross-section schematic of a Pt-Sn couple. While this two-film arrangement did not allow observations of the actual reaction interface, microtomy was used to produce cross-sections.

Download Full-text

The underpotential deposition of Bi2Te3−ySey thin films by an electrochemical co-deposition method

Electrochimica Acta ◽

10.1016/j.electacta.2008.09.059 ◽

2009 ◽

Vol 54 (6) ◽

pp. 1680-1686 ◽

Cited By ~ 29

Author(s):

Hilal Köse ◽

Mustafa Biçer ◽

Çağla Tütünoğlu ◽

Ali Osman Aydın ◽

İlkay Şişman

Keyword(s):

Thin Films ◽

Underpotential Deposition ◽

Deposition Method

Download Full-text

Observation of gold-silicon alloy formation in thin films by high resolution electron microscopy

Acta Metallurgica et Materialia ◽

10.1016/0956-7151(91)90265-3 ◽

1991 ◽

Vol 39 (2) ◽

pp. 179-186 ◽

Cited By ~ 7

Author(s):

W. Robison ◽

R. Sharma ◽

L. Eyring

Keyword(s):

Electron Microscopy ◽

Thin Films ◽

High Resolution ◽

High Resolution Electron Microscopy ◽

Alloy Formation ◽

Silicon Alloy ◽

Resolution Electron

Download Full-text

Al–Fe alloy formation by aluminium underpotential deposition from AlCl3+ NaCl melts on iron substrate

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.3139/146.110443 ◽

2011 ◽

Vol 102 (1) ◽

pp. 59-68 ◽

Cited By ~ 3

Author(s):

Branka S. Radović ◽

Vesna S. Cvetković ◽

Robert A. H. Edwards ◽

Jovan N. Jovićević

Keyword(s):

Underpotential Deposition ◽

Alloy Formation

Download Full-text

Al-Cd Alloy Formation by Aluminum Underpotential Deposition from AlCl3+NaCl Melts on Cadmium Substrate

Metallurgical and Materials Transactions B ◽

10.1007/s11663-012-9750-3 ◽

2012 ◽

Vol 44 (1) ◽

pp. 106-114 ◽

Cited By ~ 3

Author(s):

Niko Jovićević ◽

Vesna S. Cvetković ◽

Željko J. Kamberović ◽

Jovan N. Jovićević

Keyword(s):

Underpotential Deposition ◽

Alloy Formation

Download Full-text

Aluminium/zirconium alloys obtained by Al underpotential deposition onto Zr from low temperature AlCl3+NaCl molten salts

Journal of the Serbian Chemical Society ◽

10.2298/jsc190620073c ◽

2019 ◽

Vol 84 (11) ◽

pp. 1329-1344

Author(s):

Vesna Cvetkovic ◽

Niko Jovicevic ◽

Natasa Vukicevic ◽

Jovan Jovicevic

Keyword(s):

Low Temperature ◽

Zirconium Alloys ◽

Linear Sweep Voltammetry ◽

Underpotential Deposition ◽

Alloy Formation ◽

X Ray Diffraction ◽

Electrode Surfaces ◽

Chloroaluminate Melt ◽

Thermal Preparation

Contrary to the widely accepted hypothesis that it is not possible, aluminium underpotential deposition (UPD) onto zirconium from a low temperature (200, 250 and 300?C) equimolar chloroaluminate melt was recorded. Furthermore, it was shown that aluminium UPD facilitates alloy formation between the deposited aluminium monolayer and the zirconium substrate by interdiffusion. The aluminium/zirconium alloys formed at the temperatures substantially lower than those needed for thermal preparation of the same alloys were: Al3Zr2 and Al3Zr. Experimental techniques used were linear sweep voltammetry, potential step, scanning electron microscope, energy dispersive spectroscopy and X-ray diffraction were used for characterization of obtained electrode surfaces.

Download Full-text