Temperature-controlled synthesis of MgO nanorods

We have synthesized MgO nanorods on Ag-coated substrates through the thermal evaporation of MgB2 powders. The growth temperature affected the sample morphology, with one-dimensional (1D) structures rather than film-like structures being favored at lower temperatures. The average diameter of the, 1D structures grown at 800 degrees C was smaller than that of the structures grown at 900 degrees C. The obtained MgO nanorods were single-crystal cubic structures. We have proposed a possible growth mechanism of the MgO nanorods. The PL measurement with a Gaussian fitting exhibited visible light emission bands centered at 430 nm and 528 nm.