Manipulation of ZnO/Polymer Nanocomposites Generated by Nanosecond Laser Ablation in Organic Liquid
Acta Physica Polonica. A
We present experimental results on the production of ZnO nanoparticles with second harmonic of pulsed nanosecond Nd:YAG laser (λ = 532 nm, pulse duration = 5 ns) in tetrahydrofuran with 0.0 wt% and 0.8 wt% concentrations of polystyrene by high (200 mJ pulse energy) and moderate (80 mJ pulse energy) pulse energies. The produced colloids were characterized by ultraviolet-visible absorption, transmission electron microscopy, room temperature photoluminescence emission and dynamic light scattering.
... c light scattering. The mean size of nanoparticles decreased from 40 nm to 22 nm by adding polymer (0.8 wt%) and increasing the pulse energy. The colloidal nanocomposites showed a shoulder at 360 nm in ultraviolet-visible absorption spectra and were found very stable for one month. We observed two photoluminescence emission peaks in UV region at 380 nm and 400 nm attributed to exciton transition. Dynamic light scattering indicated that the size and aggregation of nanocomposites were controlled by polymer concentration and pulse energy.