CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

morphology by heating at 500 and 900°C, respectively. On heat treatment at 900°C,
amorphous GaOOH containing more than 2 atom % lanthanide ions lead to the formation of
β-Ga 2 O 3 nanoparticles instead of nanorods. During the heat treatment, the fine dispersion of
lanthanide with gallium hydroxides helped in diffusion of lanthanide ions into the Ga 2 O 3
phase as revealed by the existence of strong energy transfer with efficiency more than 90%
between the host Ga 2 O 3 and lanthanide ions. Strong blue, red and green emissions have been
observed from undoped, Eu 3+ and Tb 3+ doped β-Ga 2 O 3 , respectively whereas Er 3+ doped β-
Ga 2 O 3 nanomaterials showed strong near infrared (NIR) emission (~1535 nm) on host
excitation.
undoped GaOOH
Intensity (arb.units)
0.5% Eu
0.75% Eu
1% Eu
2% Eu
20 30 40 50 60 70
2θ /°
Figure 1. XRD patterns of GaOOH: Eu 3+ nanorods
The second section of this chapter deals with the synthesis, characterization of
undoped, and lanthanide containing Sb 2 O 3 nanomaterials. Both undoped and lanthanide ions
containing Sb 2 O 3 nanorods were prepared at room temperature by hydrolysis of SbCl 3 in
isopropanol medium and characterized for their structural and luminescent properties. These
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