Effect of pressure on nanomaterials

摘要

A simple theory is proposed to predict the effect of pressure on nanomaterials, which gets support from the Mie-Gruneisen theory of thermal expansivity as formulated by Born and Huang. We considered LiAlSi _2O_6 to study the effect of pressure in the light of other formulations, viz. Murnaghan, BirchMumaghan, Vinet and Kumar. The results obtained are found to present a good agreement with the experimental data as well as other formulations. To confirm the validity of the formulation, we applied the method to study the compression behaviour of a number of nanomaterials, viz. CdSe, Rb_3C_(60), Ni(20 nm), carbon nanotube, γ-Fe_2O_3, ε-Fe (Hexagonal iron), MgO, CuO, γ-Al_2O_3 (67 nm), α-Fe_2O _3, α-Fe (filled nanotube), TiO_2 (anatase), 3C-SiC (30 nm), TiO_2 (rutile phase), Zr_(0.1)Ti_(0.9)O _2, AlN (hexagonal), γ-Si_3N_4, Ni-filled MWCNT and Fe-filled MWCNT. The results obtained are compared with the experimental data. A good agreement between theory and experiment demonstrates the validity of the present approach.