Metal nanoparticles influence on nanocomposite optical properties
Jovita Pudlauskait (KTU), Virginija Jankauskait (Kaunas University of technology), Igoris Prosycevas (Kaunas University of Technology), Pranas Narmontas (Kaunas University of Technology)
Advancement in Coating Science and Technology
Mon 4:20 - 5:40
RI Hall 108
Nowadays technologies continuously require new knowledge-based nanostructured polymers with special combinations of exclusive properties. The incorporation of nanoparticles into polymer matrices will create a new class of materials in which the dimension of the dispersed particles occurs at the nanometer scale. These materials are of current interest because of their multi-functionality, ease process-ability, potential for large-scale manufacturing, significantly lighter than metals. The aim of this work was to investigate the influence of silver (Ag) and copper (Cu) nanoparticles deposited from colloidal solution in photopolymer composition on the morphology of grating. Light sensitive DNQ-novolac positive photoresist was used for the investigations. Ag colloid was produced in distilled water, dioxane, chloroform, alcohol-polyvinylpyrrolidone and Cu colloid in alcohol solvents, and incorporated into polymer composition by mixing. The content of colloid concentration in polymer varied from 0 wt% to 40 wt%. The film of modified polymer was obtained by spin coating on optical quartz substrate and dried at 100° C for 20 min. The gratings were formed by UV lithography. Analysis performed with Fourier transform infrared spectroscopy, atomic force microscope and scanning electron microscope with X-ray microanalysis showed that metal nanoparticles from different colloidal solutions change the grating chemical structure and geometry – the ridges of grating splits into two parts, supposing due to the metal nanoparticles light diffusion. Therefore, the ridge surface becomes soluble to etching solvents, while exposure areas are removed.