Promising Metamaterials for Optoelectronics based on Polymer Nanocomposites

, Cu/Cu 2 O (CuO), ZnO, CdS nanoparticles stabilized in low density polyethylene (LDPE) were selected as polymer nanocomposites as objects of study. The studies were carried out both on powder samples and on materials in the form of a film with a thickness of 15-50 microns and plates with a thickness of 400-1000 microns. The synthesis of metal-containing nanocomposites was carried out by the method of high-speed thermal decomposition of solutions of metal-containing compounds. Iron pentacarbonyl was used as starting compounds to obtain iron-containing nanoparticles, and corresponding acetates were used for copper and zinc-containing ones. Obtaining nanomaterials was carried out in a solution-melt of polyethylene in purified mineral oil in an argon atmosphere at the decomposition temperature of the above precursors. The gas feed rate was controlled in such a way as to ensure fast and complete removal of ligands and solvent from the reactor. The calculated amount of the solution containing the precursor was introduced into the melt of high-pressure polyethylene with vigorous stirring. After washing the oil with hexane in a Soxhlett apparatus, the samples were dried in vacuum and stored until studies in air began. The resulting materials were powders whose color depended on the concentration and nature of the nanoparticles. The materials necessary for the study of the mold were made from the materials obtained by hot pressing. samples The basic electrophysical and optical properties of samples with different of nanoparticles nanoparticles in the LDPE the sizes of which depend on the concentration and nature of the The sizes of and zinc containing nanoparticles in the studied were: 1-10nm, 10-25nm and respectively. The results of measuring the passage of direct current through copper-containing nanocomposites at different showed that contact phenomena are clearly at low temperatures. With a further increase in temperature, the resistance of the sample decreases, and the current throughput increases, which reflects the semiconductor nature of the studied nanomaterials. The study of the temperature dependences of the passage of current through copper-containing samples of nanocomposites revealed an interesting feature, which consists in observing the current hysteresis during heating and cooling of the samples. The conductivity, dielectric constant, and dielectric loss tangent of copper-containing nanocomposites were studied, and the concentration dependence of these properties was determined for these materials. With an increase in the concentration of nanoparticles in the polymer matrix, the dielectric constant increases by six times, losses at a frequency of 1 MHz increase by a factor of three, and conductivity increases by almost times. A specific feature of the electrophysical properties of nanocomposites on copper-containing nanoparticles in a in electrical conductivity