Influence of Poly(diallyldimethylammonium chloride) on the morphology, crystalline structure, and photoluminescence of ZnO microrods grown via in-situ hydrothermal route
ZnO microrods were successfully grown via hydrothermal route using zinc acetate dihydrate and hexamine as precursors at 90oC for 2h. The role of poly(diallyldimethylammonium chloride)(PDDA) as growth modifier has been investigated by studying its influence on the morphology, crystal structure, and photoluminescence of ZnO microrods. Average length and width of the rods were measured with respect to the concentration of the cationic polymer. SEM images and XRD data confirmed that the structure is hexagonal wurtzite with an approximate lattice parameter of a = 3.24 Å and c = 5.20 Å. UV enhancement has also been observed in the sample with 1 μM concentration of PDDA. This study shows that surface enhancement of ZnO can be done by using simple and low-cost hydrothermal route with the aid of a polyelectrolyte.