Nanophysics and physical-chemical materials science

Adsorption, elastic properties of porous SiO2, porous polystyrene and automated system
Onanko A.P., Charny D.V., Onanko Y.A., Kulish M.P., Dmitrenko O.P., Vyzhva S.A., Shabatura A.V., Onischenko A.N., Busko T.O., Kurochka L.I.
Taras Shevchenko Kyiv national university, Volodymyrs’ka str., 64, Kyiv-01601, Ukraine.
E-mail: onanko@univ.kiev.ua

The influencing of ultrasonic deformation ε was researched on elastic and inelastic characteristics of porous SiO2 + Si. 

If dislocation segment ξ(x,y), that are vibrated under the act of tension τ, is charged, additional forces will operate on it  and . The equation, which describes the movement of the charged dislocation under act of the mechanical, electrical and magnetic fields, acquires the following kind:

Рис.1 к статье О.В.Ляшенко, А.П.Онанко ияние электрического тока на упругие и неупругие характеристки Ge0.963Si0.037.

.   (1)
Effects of acoustic emission (AE) under laser thermal-mechanical strains Ϭi in SiO2+TiO2+ZrO2 films are investigated and represented on fig. 1.

a                               b
Fig. 1. AE: a - Irradiation in SiO2+TiO2+ZrO2 film with thickness h ≈ 1000 nm on Fe by the ruby laser λ = 694 nm by intensity I ≈ 10 MVt/sm2; 10 V/p, 5 mcsec/p; b - irradiation by intensity I ≈ 5 MVt/sm2.
The depth of fusion as the result of relaxation of thermoelastic strains Ϭi at the large time ΔT/Δt = (55±100).109 K/sec and spatial ΔT/Δx = (1±2).104 K/sm temperature gradients on the surface was appraised Δh ≈ 10000 nm.

Conclusions
The measuring of internal friction (IF) background Q-10 after laser irradiation gives information about the changing of the thermoelastic strains fields σi in porous SiO2+Si. The growth of heights IF maximums Q-1M testifies the growth of structural defects concentration.