Kinetic regularities of thermal transformations in nanosized bismuth films

Abstract

Transformations in a nanosized bismuth layer are studied by means of optical spectroscopy, microscopy, and gravimetry, depending on the thickness (d = 3-120 nm), thermal treatment temperature (T = 373-673 K) and time (τ] = 0.05-2500 min). It is established that, depending on the initial thickness of the bismuth films and the thermal treatment temperature, the kinetic curves of the degree of transformation are satisfactorily described within linear, inverse logarithmic, cubic, and logarithmic laws. The contact poten tial difference for the Bi, Bi 2 O 3 films and the photo electromotive force for the Bi-Bi 2 O 3 systems is mea sured. An energy band diagram for the Bi⎯Bi 2 O 3 systems is constructed. A model for the thermal transfor mation of Bi films that includes the stage of oxygen adsorption, the redistribution of charge carriers in the BiBi 2 O 3 contact field, and the formation of bismuth(III) oxide is proposed.

Photostimulated growth of In-In2O3 films

“…2-4). Pho tochemical effects of photoelectric processes in such systems may be caused by an interfacial field induced redistribution of photogenerated charge carriers [7,[14][15][16][17][18][19][20]. These processes will lead to significant changes in the conditions for the indium oxidation process in the In-In 2 O 3 system relative to the oxida tion of indium films under atmospheric conditions.…”

“…Indium is chemically active, so it suffers from atmospheric corrosion when exposed to an ambient atmosphere. The study of common aspects of ther mally induced processes in indium nanolayers and on their surface is helpful for the ability to develop funda mentally new materials for semiconductor electronics that would have high corrosion resistance [9,[16][17][18][19][20][21][22].…”

Kinetic regularities of thermal transformations in nanosized lead films

“…Nanosized and submicron metal and metal oxide films and multilayer film heterosystems are now being widely used as design elements and functional layers in modern electronic devices and parts of aerospace structures and as solid wear resistant coatings in pro cessing industry [1][2][3][4][5][6][7][8][9]. Lead is also widely used in var ious fields of science, technology, and industry due to its useful properties (plasticity, low melting point, cor rosion resistance, etc.)…”

Kinetic laws of thermal transformations in nickel nanofilms

“…Studies of the laws governing processes that occur in nanolayers of various materials under the action of different energy factors are of interest to both solid state physics and chemistry and in the development of real systems with adjustable levels of sensitivity to var ious external impacts [1][2][3][4][5][6][7][8][9]. Due to their set of useful properties (e.g., corrosion resistance, high plasticity and ductility, chemical inertness, heat resistance, strength, magnetostriction, the ability to dissolve sig nificant amounts of other metals, and low vapor pres sure), nickel and compounds based on it are exten sively used in many fields of science, engineering, and industry [10][11][12][13][14][15].…”