Nano NiCr2O4 undoped and La doped NiCr2O4 nanorods array were successfully prepared by solution based conventional method[sbcm]. The synthesized samples were characterized by the diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) spectroscopy for finding optical properties. Further. the samples structure confirmed by Fourier transforms infrared (FTIR). https://www.lightspeedlovers.shop/product-category/suction-vibrators/