Casted polymeric blends of carboxymethyl cellulose/polyvinyl alcohol doped with gold nanoparticles via pulsed laser ablation technique; morphological features, optical and electrical investigation

Polymeric blends of carboxymethyl cellulose (CMC)/polyvinyl alcohol (PVA) doped with gold nanoparticles (AuNPs) were fabricated via casting technique, while the AuNPs were injected through the films by pulsed laser ablation technique. The obtained films were characterized using FTIR, FESEM besides optical and electrical investigations. The morphological features of the as-synthesized films show that compositions were formed as agglomerated grains with dimensions around 13.1-17.4, 8.7-12.6, 4.8-6.8, 13.5-23.2 and 5.8-9.7 mu m, while AuNPs were shown as rod shapes with dimensions 1.2 x 0.19 mu m for length and diameter. The maximum height of the roughness (R-t) showed elevated values upon the additional AuNPs starting from 162.4 nm reaching to 345.1 nm for the lowest and highest contributions of AuNPs. Moreover, the direct-bandgaps were reduced with rising of AuNPs contribution starting from 5.08 to 4.88 eV. The applied electric field induced a formation of space charge polarization through the fabricated films correlated with the modification with AuNPs. Hence, compositional changes of bio-polymeric films provoke a great improvement for optoelectrical behaviors accompanied with morphological features.