Study for the effect of pressure, size and shape of nanomaterials
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Date
2020-12
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Nanomaterials at high pressure are one of the major areas of interest due to its immense potential of applications. Due to a small size nanomaterials shows novel properties. Nanoparticles are used in a variety of application, such as sensors, LEDs, drug delivery, medical diagnostics, catalyst and gene therapy. Their unique range of properties and enormous application led to the development of the nanotechnology. In the present thesis we used the Murnaghan EOS for various nanomaterials. We have computed the pressure dependence of V/V0 for different sizes and shapes viz. Film, dodecahedral, icosahedral, wire, spherical, octahedral and tetrahedral. The materials which we included in the present study are viz. MgO (20nm), MgO (11nm), ZnO2 (3.1nm), WC (25nm), n-ReB2 (40nm), n-Re0.52W0.48B2 (30nm), TiN (18nm), TiN (34nm), TiN (80nm), α-Ga2O3 (14nm), β- Ga2O3 (14nm), Ho2O3 (14nm) because of the experimental data are available on these materials so the comparison is also possible. We studied the nanomaterials for the different sizes and shapes in room temperature. A shift in isotherm is observed with the increase in size. We studied the compression behaviour of nanoparticles for different shapes and observed that there is a shift in isotherm curve and found larger for the film indicated that they are most compressible and smaller for the tetrahedral indicated that they are least compressible. This is due to the different surface to volume ratio of nanoparticles for different shapes. Our results are found to be in good agreement with the experimental data. Hence it proves the validity of the theory of EOS used in the present thesis.