Self-Organization and Nanocluster Formation Processes in Nonlinear Molecular Chains
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Self-Organization and Nanocluster Formation Processes in Nonlinear Molecular Chains I. Tereshko1, V. Abidzina1, I. Elkin2,3, N. Kalinowskaya1, and I. Melnikau1 1 Belarusian-Russian University, Mogilev, 212005, Belarus 2 Research and Production Enterprise "KAMA VT" Plc., Mogilev, 212000, Belarus 3 "NANTES - Systemy Nanotechnologii" Plc., Boleslawiec, 59-700, Poland ABSTRACT The goal of this work is to investigate self-organization processes in molecular chains. Computer simulation has been performed by means of a molecular dynamics method. Morse potential was chosen as the potential of atomic interaction. Molecular chains were exposed to low-energy ion impact by two means: mono beam and plasma treatment. The amount of the energy transferred to molecules of the chain was varied in a wide range but it must be less than the energy needed to break the chain. We showed that nonlinear oscillations become excited in the chains after low-energy ion impact and as a result of them molecules become stabilized in new positions, which results in the formation and development of new metastable molecular groups (nanoclusters). In homogenous chains formed nanoclusters correspond to elements of “molecular memory”.
INTRODUCTION Nanometer region (1-100 nm) is known to attract specialists’ attention in different fields such as physics, chemistry medicine, engineering etc. [1] Considerable progress in production and investigation of nanoclusters, nanosystems and nanodevices has been achieved due to the nanotechnology development. In particular, the microscopic method has been developing lately, which is based on the application of atomic and molecular materials properties and nonlinear effects during self-organization processes development [2, 3]. Two types of nanosystems must be distinguished precisely. The first type consists of isolated molecular or atomic nanoclusters and nanosystems and may be observed in liquid media such as water, colloidal solutions, emulsion etc [4]. The second type consists of nanoclusters that interact between each other weakly or strongly and may be observed in solid materials [5]. Computer simulation has been performed to investigate nanoclusterization processes in different materials [1, 6, 7]. Computer simulation of nanocluster formation processes in nonlinear atom chains after their low-energy ion irradiation is presented in our articles [2, 3, 8]. It was shown that these nonlinear effects were one of the reason for self-organization of materials and their deep modification, which could not be explained by classical solid-state physics. Low-energy ion bombardment of solid surface leads to nonlinear oscillations of atom oscillators of the crystal lattice, which results in the formation and development of new metastable atomic groups, in particular nanoclusters. The main aims of this paper are the following: - computer simulation of self-organization processes in nonlinear atom and molecular chains, - analysis of nanostructurization processes in atom and molecular chains under lowenergy ion i
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