CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

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Homi Bhabha National Institute Recommendations of the Viva VoceBoard As members of the Viva Voce boar~ we certify that we have read the dissertation prepared by Mr. SANYASINAIDU BODDU entitled "Synthesis and Characterization of Lanthanide Ions Doped Nanomaterials" and recommend that it may be accepted as fulfilling the dissertation requirement for the Degree of Doctor of Philosophy. Chairman - Prof. D. Das ~ _ ~ ExternalExaminer- Prof.M. L. P. R~Y ~~ Guide-Prof.V.K.Jain Co-Guide- Prof.V.Sudarsan ~ \ \J Date: Date: Date: 2:~f') I?-oI1- Date: ~ ~/.J. (..).01L Member 1 - Prof. P. N. Bajaj Member 2 - Prof. S. Kannan Date: "2-3- 2- ."U)\ L Final approval and acceptance of this dissertation is contingent upon the candidate's submission of the final copies of the dissertation to HBNI. We hereby certify that we have read this dissertation prepared under our direction and recommend that it may be accepted as fulfilling the dissertation requirement. Date: 0( ~ , cl \et 0 ( .L Place: f\,.,,\U.}'l'Y) btL-i' ~,v_ Prof. V. Sudarsan ~ /aML Prof. . K.Jain ~('1'W/)' 2
STATEMENT BY AUTHOR This dissertation has been submitted in partial fulfillment of requirements for an advanced degree at Homi Bhabha National Institute (HBNI) and is deposited in the Library to be made available to borrowers under rules of the HBNI. Brief quotations from this dissertation are allowable without special permission, provided that accurate acknowledgement of source is made. Requests for permission for extended quotation from or reproduction of this manuscript in whole or in part may be granted by the Competent Authority of HBNI when in his or her judgment the proposed use of the material is in the interests of scholarship. In all other instances, however, permission must be obtained from the author. Sanyasinaidu Boddu
Page 1: SYNTHESIS AND CHARACTERIZATION OF L
Page 5 and 6: Dedicated to ……… My beloved b
Page 7 and 8: also thankful to all the members of
Page 9 and 10: 2.3 Synthesis of binary oxide nanom
Page 11 and 12: CHAPTER 5: Zinc Gallate ...........
Page 13 and 14: imaging, scintillators, lasers, etc
Page 15 and 16: morphology by heating at 500 and 90
Page 17 and 18: nanoparticles having hexagonal stru
Page 19 and 20: 100°C and 185°C, respectively in
Page 21 and 22: into poly methyl methacryllate (PMM
Page 23 and 24: 3. N. M. Dimitrijevic, Z. V. Saponj
Page 25 and 26: Fig.13: Fig.14: (a) Simplified ray
Page 27 and 28: Eu 3+ ions after heat treatment at
Page 29 and 30: 615 nm Fig.50: FT-IR patterns (a) a
Page 31 and 32: area electron diffraction pattern a
Page 33 and 34: different amounts of Eu 3+ . Fig.86
Page 35 and 36: and 545 nm, respectively. Fig.106:
Page 37 and 38: List of Tables: Table 1: Variation
Page 39 and 40: CHAPTER 1: Introduction 1.1 Histori
Page 41 and 42: Rods, cylinders, wires and tubes ar
Page 43 and 44: must be supersaturated either by di
Page 45 and 46: - + - + charge stabilized nanoparti
Page 47 and 48: exothermic reaction between the met
Page 49 and 50: constant, ħ is h/2π, e is the ele
Page 51 and 52: 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
Page 133 and 134:
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
Page 157 and 158:
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
Page 173 and 174:
ethylene glycol moiety (stabilizing
Page 175 and 176:
Room temperature and 100°C synthes
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heavier metal ion as compared to La
Page 179 and 180:
Similar studies were also carried o
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3+ 3+ faster decay component is ass
Page 183 and 184:
the other hand the Eu 3+ lifetime h
Page 185 and 186:
3+ 4.4.8 Luminescence studies on Sm
Page 187 and 188:
CHAPTER 5: Zinc gallate (ZnGa 2 O 4
Page 189 and 190:
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 and 242:
B. S. Naidu, B. Vishwanadh, V. Suda
Page 243:
9. Room temperature synthesis of mu
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CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

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