CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

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3. Luminescence studies on GaPO4: Ln (Ln = Eu 3+ , Dy 3+ , Tb 3+ and Ce 3+ ) nanoparticles B. S. Naidu, V. Sudarsan, R. K. Vatsa and R. Tewari 53 rd DAE solid state physics symposium, BARC, Mumbai, 53(2008) 491. 4. Blue light emitting In 3+ doped ZnGa 2 O 4 nanoparticles B. S. Naidu, V. Sudarsan, R. K. Vatsa National Conference on Advances in Nanomaterials, Devices and Technologies (NCANDT-2009), S. V. Degree college, Kadapa, July 11-12, 2009, pp. 54. 5. Microstructural studies on GaOOH and Ga 2 O 3 nanorods B. S. Naidu, J. Nuwad, V. Sudarsan, R. K. Vatsa, C. G. S. Pillai Two Day Seminor on Microtexture and Microstructure (Micristructure-2009), BARC, Mumbai, November 27-28, 2009, pp. 87. 6. Lanthanide ions (Ce 3+ , Tb 3+ ) doped nanoribbons/nanoparticles of SbPO 4 B. S. Naidu, V. Sudarsan, J. Ghattak, R. K. Vatsa International Conference on Advances in Electron microscopy and Related Techniques (EMSI-2010), BARC, Mumbai, March 8-10, 2010, pp 433-434. 7. Room temperature synthesis and characterization of lanthanide ions doped MWO 4 (M = Ca, Sr, Ba) nanoparticles B. S. Naidu, B. Vishwanadh, V. Sudarsan, R. K. Vatsa 3 rd DAE-BRNS International symposium on material chemistry (ISMC-2010), BARC, Mumbai, December 7-11, 2010, pp.180 Oral presentations: 8. Synthesis and Luminescence studies of lanthanide ion doped BiPO 4 nanomaterials B. S. Naidu, V. Sudarsan, R. K. Vatsa Indo-Russian Workshop on Nanotechnology and Laser Induced Plasma (IRNANO- 2009), Delhi University, Delhi, November 24-26, 2009, pp. 39. 204
9. Room temperature synthesis of multi colour light emitting CaWO 4 nanoparticles B. S. Naidu, B. Vishwanadh, V. Sudarsan, R. K. Vatsa International Conference on Recent Trends in Materials Science and Technology (ICMST-2010), Indian Institute of Space science and Technology, Thiruvananthapuram, October 29-31, 2010, pp. 6.16 - 6.18. 10. Synthesis and characterization of lanthanide ions doped nanomaterials B. S. Naidu, V. Sudarsan, V. K. Jain 23 rd Research Scholars Meet (RSM-2010), Indian Chemical Society (Mumbai branch) and N. G. Acharya and D. K. Marathe College, Mumbai, Febraury 25-26, 2011, pp. 2. 205
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SYNTHESIS AND CHARACTERIZATION OF L
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STATEMENT BY AUTHOR This dissertati
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Dedicated to ……… My beloved b
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also thankful to all the members of
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2.3 Synthesis of binary oxide nanom
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CHAPTER 5: Zinc Gallate ...........
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imaging, scintillators, lasers, etc
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morphology by heating at 500 and 90
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nanoparticles having hexagonal stru
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100°C and 185°C, respectively in
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into poly methyl methacryllate (PMM
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3. N. M. Dimitrijevic, Z. V. Saponj
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Fig.13: Fig.14: (a) Simplified ray
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Eu 3+ ions after heat treatment at
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615 nm Fig.50: FT-IR patterns (a) a
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area electron diffraction pattern a
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different amounts of Eu 3+ . Fig.86
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and 545 nm, respectively. Fig.106:
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List of Tables: Table 1: Variation
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CHAPTER 1: Introduction 1.1 Histori
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Rods, cylinders, wires and tubes ar
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must be supersaturated either by di
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- + - + charge stabilized nanoparti
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exothermic reaction between the met
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constant, ħ is h/2π, e is the ele
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these platinum complexes have been
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(IR), visible and ultra-violet (UV)
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in Ce 3+ , Pr 3+ , Tb 3+ and CT abs
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assisted by lattice phonons of appr
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decay-time reduction is much easier
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nanocrystals is shown in Fig.10 [58
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depends strongly on the nature of t
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corresponding emission and excitati
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doped nanomaterials of the above me
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will be formed and subsequently it
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Eu 3+ ions were also subjected to s
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transferred into a two-necked RB fl
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Where λ is the wavelength of X-ray
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Micro-structural characterization b
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electrons (i.e. diffraction mode).
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diffraction spots. By tilting a cry
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surface. The contact mode can obtai
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three types lines in the scattered
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solids tend to be broadened because
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sample fluoresce. The fluorescent l
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pulse frequency) as excitation sour
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Lanthanide ions doped Ga 2 O 3 nano
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atoms at three corners and the lone
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Figure 19 (a-d) shows SEM images of
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Based on these results, it can be i
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almost normal to the equatorial pla
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Table 2. Summary of important modes
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systematic disappearance of these t
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comparison, Eu 3+ ions alone in wat
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the samples, suggesting that Eu 3+
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These inferences are further substa
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Similar DTA peaks have been reporte
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GaOOH samples doped with different
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The cell parameters increases with
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strong emission compared to corresp
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curves are shown in Fig.39. Lifetim
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Similar results are also observed f
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intensity of XRD peaks correspond t
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compared to the bulk material and a
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is almost 1½ times that of peak B1
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3.8 Interaction of Eu 3+ ions with
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The spectrum shows strong emission
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The decay curves are found to be bi
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As prepared undoped Sb 2 O 3 sample
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Intensity(arb.units) 1.0 0.8 0.6 0.
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3+ having surface lanthanide ions.
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diffraction patterns from the GaPO
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5 D 0 7 F 2 level to 7 F 7 7 1 , F
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The second possibility is the excha
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chemical shift anisotropy is much h
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not have strong interaction with th
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(001) (110) (011) (101) (020) (101)
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growth centre compared to higher vi
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observed after excitation at 250 an
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3+ 3+ concentration quenching. Tb l
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Compared to the selected area elect
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lattice. Lanthanide ions occupying
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obtained after 275 nm excitation is
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The luminescence dynamics associate
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that the broad peak can be resolved
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espectively. Value of this integral
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ethylene glycol moiety (stabilizing
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Room temperature and 100°C synthes
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heavier metal ion as compared to La
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Similar studies were also carried o
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3+ 3+ faster decay component is ass
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the other hand the Eu 3+ lifetime h
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3+ 4.4.8 Luminescence studies on Sm
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CHAPTER 5: Zinc gallate (ZnGa 2 O 4
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In pure EG an amorphous product is
Page 191 and 192: water content in the reaction mediu
Page 193 and 194: nucleation, thereby leading to incr
Page 195 and 196: particles. Thus the TEM studies als
Page 197 and 198: value. The lattice parameters calcu
Page 199 and 200: Quantum yield of the blue emission
Page 201 and 202: 5.5.2. Eu 3+ doped ZnGa 1.5 In 0.5
Page 203 and 204: CHAPTER 6: Tungstates [MWO 4 (M = C
Page 205 and 206: ionic radius of the metal cation ca
Page 207 and 208: lattice. Asymmetric ratio is ~ 12 f
Page 209 and 210: 700 Intensity (arb.units) 600 λ ex
Page 211 and 212: Intensity (arb.units) 25000 20000 1
Page 213 and 214: Strong green emission has been obse
Page 215 and 216: consists of strong band at 255 nm a
Page 217 and 218: peak can be attributed to the cryst
Page 219 and 220: nm) is observed from Er 3+ doped Ga
Page 221 and 222: and Dy 3+ doped CaWO 4 nanoparticle
Page 223 and 224: REFERENCES 1. D. J. Barber, I. C. F
Page 225 and 226: 32. K. A. Gschneidner, Jr., L. Eyri
Page 227 and 228: 65. Z. Deng, F. Tang, D. Chen, X. M
Page 229 and 230: 100. A. Rouanel, J. J. Serra, K. Al
Page 231 and 232: 130. F. Li, W. Jianhuai, L. Jiongti
Page 233 and 234: 166. L. Fu, Z. Liu, Y. Liu, B. Han,
Page 235 and 236: 205. R. Sasikala, V. Sudarsan, C. S
Page 237 and 238: 238. E. Oldfield, R. A. Kinsey, K.
Page 239 and 240: 271. B. G. Hyde, S. Andersson, ”I
Page 241: B. S. Naidu, B. Vishwanadh, V. Suda
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