To the Thermodynamic Characteristics of Nanosystems. II. Surface Tension Effect
https://doi.org/10.56304/S2304487X21020127
Abstract
The problem of an increase in the thermodynamic potentials of an ensemble of nanoparticles compared to a microcrystal because of the surface tension effect has been formulated and solved. The results have been applied to nanostructures composed of indium and gold with different size distributions including even, linear, exponential, and normal. The largest increase for indium (9.44 · 10–29 J per particle at 300 K) and gold (1.19 · 10–28 J) occurs with the linearly decreasing distribution function and with one of configurations of the normal distribution, respectively. Physically, the results appear to be reasonable because ultrasmall nanoparticles, which has a particular meaning for the effect, dominate in both cases. The surface tension effect in gold is more pronounced than in indium. The presence of ultrasmall nanoparticles in an ensemble has the vacancy-related effect that reduces thermodynamic potentials of the system to dominate over the surface tension effect, which determine the stability of the system. The vacancy-related effect drops sharply with a decrease in the number of ultrasmall nanoparticles and, under certain conditions, can become smaller than the surface tension effect. An overall increase in the thermodynamic potentials can potentially result in the loss of the system stability.
About the Authors
M. Vigdorowitsch
Angara GmbH; Tambov State University; All-Russian Scientific Research Institute for the Use of Machinery and Oil Products in Agriculture
Germany
Germany
40599
Düsseldorf
Russia
392000
392022
Tambov
L. E. Tsygankova
Tambov State University named after G. R. Derzhavin
Russian Federation
Russian Federation
392000
Tambov
V. I. Vigdorovich
All-Russian Scientific Research Institute for the Use of Machinery and Oil Products in Agriculture
Russian Federation
Russian Federation
392022
Tambov
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Review
For citations:
Vigdorowitsch M., Tsygankova L.E., Vigdorovich V.I. To the Thermodynamic Characteristics of Nanosystems. II. Surface Tension Effect. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2021;10(2):112-123. (In Russ.) https://doi.org/10.56304/S2304487X21020127
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