General aspects of the growth of In-In2O3 films

Shen

Bugerko

et al. 2014

Russ. J. Phys. Chem.

Self Cite

The transformations in nanosized lead films were studied by optical spectroscopy, microscopy, and gravimetry at different film thicknesses (d = 2-115 nm) and thermal treatment temperatures (T = 373-573 K). The kinetic curves of conversion were adequately described in terms of the linear, inverse logarithmic, parabolic, and logarithmic laws. The contact potential difference was measured for Pb and PbO films and photo EMF was measured for Pb-PbO systems. The energy band diagram was constructed for Pb-PbO sys tems. A model of the thermal transformation of Pb films was suggested, which included the stages of oxygen adsorption, charge carrier distribution in the contact field of Pb-PbO, and formation of lead(II) oxide.

Section: Introductionmentioning

confidence: 99%

Kinetic regularities of thermal transformations in nanosized lead films

Shen

Bugerko

et al. 2014

Russ. J. Phys. Chem.

Self Cite

“…Fundamental aspects of processes in heterogeneous systems are of interest for solid state physics and chem istry in many respects [1][2][3][4][5][6][7][8][9][10][11]. Studies of heterogeneous nanosystems are of technological importance and can be useful in gaining insight into the mechanism of solid state transformations [3][4][5][6][7]11].…”

Section: Introductionmentioning

confidence: 99%

“…Studies of heterogeneous nanosystems are of technological importance and can be useful in gaining insight into the mechanism of solid state transformations [3][4][5][6][7]11]. Indium, molybde num(VI) oxide, and related materials are widely used in scientific, technological, and industrial applications owing to their advantageous properties and, as a conse quence, have attracted considerable attention of researchers in various fields [1][2][3][4][8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Evaporants were contained in 3 mm thick molybdenum boats. As substrates, we used photo graphic plates, which were pretreated in a potassium dichromate solution and concentrated sulfuric acid, rinsed with distilled water, and dried [7,11,21]. The substrates thus prepared were optically transparent in the range 300-1100 nm.…”

Section: Introductionmentioning

confidence: 99%

“…The thickness of the MoO 3 and In films was deter mined using spectrophotometry, ellipsometry (LEF 3M laser ellipsometer), optical microscopy (MII 4 interference microscope), and gravimetry (quartz crystal resonator) [7,11,21].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal transformations in In-MoO3 nanofilms

Eremeeva

2013

Inorg Mater

Self Cite

Transformations in In-MoO 3 nanosystems have been studied by optical spectroscopy, micros copy, and gravimetry in relation to the thickness of the In and MoO 3 layers and heat treatment temperature and time. We have measured the contact potential difference across the In and MoO 3 films and the photo voltage in the In-MoO 3 system and constructed the energy band diagram of the In-MoO 3 system. A model has been proposed for the thermal transformation of the MoO 3 films in In-MoO 3 bilayers, which involves a redistribution of equilibrium charge carriers at the contact, the formation of a [(V a ) ++ e] center during the preparation of the MoO 3 film, transformation of the center into a [e(V a ) ++ e] center during the fabrication of the In-MoO 3 bilayer, and thermal ionization of the [e(V a ) ++ e] center.

Thermal modification of MoO3 nanofilms

Eremeeva

2013

Inorg Mater

Self Cite

Optical spectroscopy results demonstrate that heat treatment of 2 to 60 nm thick MoO 3 films for 1 s to 120 min in the temperature range 573-873 K reduces their absorbance in the range λ = 300-480 nm (λ max = 350 nm) and increases it in the range λ = 480-1100 nm (λ max = 870 nm). The degree of conversion of the MoO 3 films increases with increasing heat treatment time and temperature and with decreasing film thickness. A mechanism is proposed for the thermal modification of MoO 3 films, which involves the forma tion of a [(V a ) ++ e] center during the preparation of the MoO 3 film and a thermally activated electron transi tion from the valence band to the level of the [(V a ) ++ e] center, resulting in the formation of an [e (V a ) ++ e] center.