Investigation of different geometry of gold nanoparticles in the displacement of the second phase of three-dimensional manipulation using an AFM

The widely used chemical properties, significant conductivity, and medicinal properties of gold have led to the use of this material in most manufacturing, electronic, aerospace, and medical industries. Therefore, understanding the structure of this metal, the ability to assemble it in atomic dimensions, and improving the properties of this precious metal have been considered in nanoscience. For this reason, today researchers have tried to identify gold nanoparticles during the manipulation process and use an atomic force microscope to make the studies practical. In this article, to investigate the gold nanoparticle in the second phase of manipulation, the surface is explored experimentally by an atomic force microscope. The simulations have been done in a 3D environment. Among the important parameters investigated in this research, different geometries of gold nanoparticles, including spherical, cylindrical, and crowned rollers geometries, as well as the results of simulation with contact models with different geometries in the second phase of manipulation have been investigated. Studies have been carried out in two directions, x and y. The displacement of the gold nanoparticle has been investigated by drawing force, acceleration, and velocity diagrams, and finally, by examining the resulting diagrams considering the Hertz contact model, the maximum displacement has been calculated for simulating the process of spherical geometry and the lowest value for the contact model with crowned rollers geometry. Also, the amount of displacement along the x-axis for the cylinder and crowned rollers was about 3.5 and 3.6 times the displacement along the y-axis, respectively.