CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

and 545 nm, respectively.
Fig.106: XRD patterns of MWO 4 (M = Ca, Sr, Ba) nanoparticles.
Fig.107: TEM image of (a and b) CaWO 4 , (c) SrWO 4 and (d) BaWO 4 nanomaterials and
inset of the images shows corresponding SAED pattern.
Fig.108: (a) Emission spectra and (b) excitation spectra from CaWO 4 : Eu 3+ , SrWO 4 : Eu 3+ ,
BaWO 4 : Eu 3+ nanoparticles. (λ exc = 270 nm and λ em = 615 nm)
Fig.109: Emission spectrum (a) and photograph of emission (b) obtained from CaWO 4 :Eu
nanoparticles after excitation at 253 nm. The corresponding excitation spectrum
and decay curve, both monitored at 425 nm emission, is shown in Fig.109 (c)
and (d) respectively.
Fig.110: XRD patterns of as prepared, 300, 500, 700 and 900°C heated CaWO 4
nanoparticles.
Fig.111: Emission spectra (a) and excited state decay curves (b) of CaWO 4 nanoparticles
as a function of heat treatment (particle size). (λ exc =253 nm and λ em = 425 nm)
Fig.112: Emission spectra (a) and photograph of emission (b) obtained after excitation at
253 nm from CaWO 3 :Tb 3+ nanoparticles. The corresponding excitation spectrum
and decay curve monitored at 545 nm emission is shown in Fig.112 (c and d)
respectively.
Fig.113: Emission spectrum (a) and photograph of emission (b) obtained after excitation
at 253 nm from CaWO 4 :Dy 3+ nanoparticles. Corresponding excitation spectrum
and decay curve monitored at 574 nm emission is shown in Fig.113 (c and d).
Fig.114: Emission spectrum (a) and photograph of emission (b) obtained after excitation
at 253 nm from CaWO 4 : Sm 3+ nanoparticles. Corresponding excitation spectrum
and decay curve monitored at 602 nm emission is shown in Fig.114 (c and d).
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