diameter of 15 nm on the spherical shell. Because that these
nanowires produce massive surface defects, which make the
(002) plane distortion and cause the asymmetry of the (002) peak
in XRD.
The measurements of SEM, XRD and EDS indicate that the
growth temperature plays a key impact to control the morphologies
and compositions of Mg-doped ZnO nanomaterials in the present
experiments. We suggest that the possible growth mechanism
can be described as follows. Firstly, the Zn and Mg vapor generated
by the melted Zn and Mg alloys assembled into Mg-doped Zn
spheres on the quartz substrates before introducing the mixedgas
of argon and oxygen into the furnace system. In this step, the
growth temperature determined the diameters of the initial