ZnO and MgxZn1−xO nanocrystals grown by non-hydrolytic route

Synthesis of Zn/Mg oxide nanoparticles and its influence on sulfur vulcanization

“…Figure 2 shows that, despite the fact that the c-axis lattice constant shrinks as Mg incorporates into the structure, the a-axis lattice constant increases. These findings differ from the values reported by other researchers, 29 but it should be noted that the variation from the standard value of ZnO cell parameters' is very small. Nevertheless, there is almost no influence of the magnesium content which agrees with other authors.…”

“…26 These shifts are caused by the substitution of Zn atoms by Mg atoms in the hexagonal phase and lead to a decrease of the c-axis lattice constant. 19,[28][29][30][31][32][33] This can be seen in Figure 2, where the dependence of Zn 1Àx Mg x O lattice parameters of the hexagonal phase on Mg concentration is shown. The data were refined by CELREF.…”

“…Geng et al 28 found that for x < 0.25, only metastable Zn 1Àx Mg x O was formed and Wang 29 reported a value of x 0.30. Ohtomo et al 30 and Zhang et al 31 obtained that no cubic phase was formed if the magnesium content was lower than 33 and 39%, respectively.…”

Growth and Properties of ZnO/Zn1−xMgxO Core/Shell Nanoparticles

“…16 ZnO cores were performed with a similar method. Typically 10 ml trioctylamine in a flask was degassed by heating to 100 C in vacuum and repeatedly flushing with N 2 .…”

“…However, there are many small particles attributed to homogenously formed Zn 0 9 Mg 0 1 O nanoparticles. The blue shift inFigure 1(c) can be attributed to overlapping effects of ZnO/Zn 0 9 Mg 0 1 O core/shell and homogeneously formed Zn 0 9 Mg 0 1 O nanoparticles.During the Zn 0 9 Mg 0 1 O shell growth, Zn 0 9 Mg 0 1 O forms from zinc and magnesium cupferronates by losing their leaving groups 16. To suppress homogeneous formation of the shells, a slow supplying of Zn-O and Mg-O concentration lower than the saturation point for homogeneous nucleation is needed.…”