CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

structures and thin films [259-264]. In this study ZnGa 2 O 4 nanoparticles with different sizes
with tuneable photoluminescent properties were prepared at 120°C by co-precipitation
method. Ions like In 3+ , Eu 3+ , Tb 3+ and Ce 3+ could also be doped in ZnGa 2 O 4 nanoparticles
with a view to prepare nanomaterials with multicolour emission characteristics. Some of
these nanoparticles are also incorporated in polymers like polymethyl methacrylate (PMMA)
matrix by in situ polymerization reaction and their luminescence characteristics have been
investigated.
5.2. Effect of ethylene glycol (EG) - H 2 O solvent ratio on particle size and
photoluminescence of ZnGa 2 O 4 nanoparticles: Viscosity of the solvent is known to play an
important role in the nucleation and growth of nanoparticles. In order to check whether this is
applicable for the synthesis of ZnGa 2 O 4 nanoparticles, experiments were carried out by
changing the viscosity of solvent by varying the relative concentration of ethylene glycol
(EG) and H 2 O in the reaction medium and the corresponding XRD patterns are shown in
Fig.90.
35 ml H 2
O
10 ml EG + 25 ml H 2
O
Intensity (arb.units)
20 ml EG + 15 ml H 2
O
25 ml EG + 10 ml H 2
O
30 ml EG + 5 ml H 2
O
35 ml EG
20 30 40 50 60
Fig.90. XRD patterns of ZnGa 2 O 4 nanoparticles prepared in solvents containing different
values of EG-H 2 O ratios
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