X-ray analysis, indicating that Zn1xMgxO nanoparticles, partially
opened nanowire-on-spherical shells, hemispheric shells and
chain-like nanoparicles have been synthesized at 750, 850, 900
and 1000 C, respectively, and Mg2+ was substituted into Zn2+ site
and Mg content increases from x = 2.87% to x = 5.01% with the
increase of growth temperature from 750 to 1000 C. The blue shift
of the ultraviolet (UV) peak in the photoluminescence (PL) emission
for Zn1xMgxO nanoparticles indicates the modulation of band
gap caused by Mg addition, which is also confirmed by the increase
in energy gap value from 3.26 to 3.34 eV. The room-temperature
Raman and PL spectra show that the partially opened nanowireon-
spherical shells at 850 C have a highest concentration of
oxygen vacancies (VO) than other morphologies of Zn1xMgxO
nanomaterials. The growth mechanisms of different morphologies
of Zn1xMgxO nanomaterials are also discussed in detail.