Formation of Nanostructures on the Solid Surface

Forming nanostructures on the solids surface is one of the promising nanotechnological processes. It has been established that changes in the atomic structure of the solid surface due to the nanostructures formation result both in a significant change in various physical properties of the surface, and in an increase in its durability, strength, hardness, wear resistance. There are many different methods for forming nanostructures on solid surfaces: surface modification with nano-elements (nanoparticles, fullerenes and fullerites, graphene and nanotubes), formation of a nanocomposite layer on the surface, forming quantum dots and whiskers on the surface, implanting ions into the solid surface, laser surface treatment and other processes. The above processes are very complex and for their optimization require detailed research both by experimental and theoretical methods of mathematical modeling. The aim of this chapter was to provide a comparative review of different methods of forming nanostructures on the solids surface and mathematical modeling of these processes various aspects

The study of nucleation and condensation of nanostructures in the gaseous medium

The paper proposes a mathematical model consisting of three levels. The first level of the model is based on the equations of quantum mechanics. The level is auxiliary and is used to calculate energy parameters and potential coefficients. The second level of the model is based on the molecular dynamics apparatus and considers the processes of atoms and molecules condensation into nanostructures. At the third level of the model, the already formed nanoclusters are scrutinized and their further aggregation is implemented. We describe the movement of clusters through equations of particle mesodynamics. The formulated mathematical model in the work is applied to a set of two specific issues. The first task considers the process of aggregation of nanostructures used to power plants from the gaseous medium through pores in the stems and leaves. And the second task is to investigate the process of condensation of nanoclusters during the operation of a fire extinguishing gas generator

Synthesis of Novel Carborane-Containing Derivatives of RGD Peptide

Short peptides containing the Arg-Gly-Asp (RGD) fragment can selectively bind to integrins on the surface of tumor cells and are attractive transport molecules for the targeted delivery of therapeutic and diagnostic agents to tumors (for example, glioblastoma). We have demonstrated the possibility of obtaining the N- and C-protected RGD peptide containing 3-amino-closo-carborane and a glutaric acid residue as a linker fragment. The resulting carboranyl derivatives of the protected RGD peptide are of interest as starting compounds in the synthesis of unprotected or selectively protected peptides, as well as building blocks for preparation of boron-containing derivatives of the RGD peptide of a more complex structure