CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

Fig.13:
Fig.14:
(a) Simplified ray diagram of TEM, (b) Mass-thickness contrast
Electron diffraction patterns from (a) single crystal, (b) polycrystalline materials
and (c) nanocrystalline materials
Fig.15:
(a) Principle of AFM imaging, (b) Variation of interaction force versus distance
between the AFM tip and substrate
Fig.16:
Fig.17:
Fig.18:
Fig.19:
Principle of MAS NMR experiment
Schematic representation of spectrofluorimeter
XRD patterns of GaOOH nanomaterials prepared with different amounts of urea.
SEM images of GaOOH nanorods prepared with (a) 15 mmol, (b) 80 mmol, (c)
115 mmol and (d) 180 mmol of urea
Fig.20: XRD patterns of GaOOH sample prepared in presence of (a) 0 at % (b) 0.5 at %
(c) 0.75 at % (d) 1 at % and (e) 2 at % of Eu 3+ ions.
Fig. 21:
XRD patterns of GaOOH samples prepared in presence of (a) 2 at % Tb 3+ and
(b) 2 at % Dy 3+ .
Fig.22: SEM images of GaOOH nanorods prepared in presence of (a) 0 at % Eu 3+ (b) 0.5
at % Eu 3+ (c) 1 at % Eu 3+ and (d) 2 at% Eu 3+ .
Fig.23: FT-IR patterns (A and B) of GaOOH sample prepared in presence of (a) 0 at %
(b) 0.5 at % (c) 0.75 at % (d) 1 at % (e) 2 at % of Eu 3+ ions and (f) amorphous
Ga(OH) 3 . The Raman spectrum from the representative samples are shown in
Fig.23 (C).
Fig.24:
GaOOH structure obtained using the software MOLDRAW, depicting the
interaction of Eu 3+ ions with GaOOH lattice and collapse of its layered structure
to form amorphous gallium and europium hydroxide. Colour code: Green
spheres represent Gallium, red spheres represent oxygen and white spheres
represent hydrogen. Dotted red lines represent hydrogen bonding.
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