Fabrication and characterization of ZnO nanorods by hydrothermal growth process for DNA detection

ZnO nanorods, also known as metal-oxide semiconductor, with its high isoelectric point properties make it suitable for DNA application. To produce highly crystalline ZnO nanorods, the ZnO nanorods were synthesized using hydrothermal technique and annealed in the furnace at 500°C for 2 hours. XRD patterns indicates that the synthesized ZnO nanorods have preferred orientation along the (002) plane. Moreover, FESEM images shows that the nanorods with diameter less than 50 nanometer were successfully synthesized using hydrothermal growth technique. Furthermore, the ZnO nanorods which undergo DNA detection using dielectric analyzer shows that the hybridization of target DNA on probe DNA gave the highest change in redox current, which was -53.04 μA.