Zinc Oxide (ZnO) nanorods have been achieved by a simple chemical precipitation method at room temperature. Poly Vinyl Pyrrolidone (PVP) is used as a capping agent. X-Ray Diffraction (XRD) result shows that the synthesized undopedZnOnanorods have wurtzite hexagonal structure without any impurities. It has been seen that the growth orientation of the prepared ZnOnanorods were (101). XRD analysis revealed that the nanorods have the crystallite size 49 nm. Debye Scherrer formula is used for

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... ting the crystalline size and Williomson Hall equation is used for calculating thelattice strain. Cell volume, Lorentz factor, Lorentz polarization factor, bond length, texture coefficient, lattice constants and dislocation density are also studied. Here, we also compared the interplaner spacing and relative peak intensities from their standard values with different angles. The Scanning Electron Microscope (SEM) image confirmed the size and shape of these nanorods. It has been found that the diameter of nanorods ranges from 1.52 µm to 1.61 µm and the length about 4.89 µm. At room temperature Ultraviolet Visible (UV-Vis) absorption band has been observed around 355 nm (blue shifted as compared to bulk). The average particle size is also calculated by mathematical model of effective mass approximation equation by using UV-Visible absorption peak. Finally, the bandgap is calculated by UV-absorption peak.