Transition metal and rare earth doped stoichiometric lithium niobate crystals for holographic recording
Transition metal and rare earth doped stoichiometric lithium niobate crystals for holographic recording
... TRANSITION METAL AND RARE EARTH DOPED STOICHIOMETRIC LITHIUM NIOBATE CRYSTALS FOR HOLOGRAPHIC RECORDING SANJEEV SOLANKI (M.Tech) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR ... undoped and doped SLN crystals 12 2.2.1 Stoichiometric undoped 12 2.2.2 Stoichiometric doped 19 2.2.3 Stoichiometric doubly doped 20 2.2.3 Stoichiometric triply doped ... crystal and still continuing to test various doped SLN (stoichiometric lithium niobate) crystals Out of the long list of transition metal and rare earth dopants (Fe, Cu, Ce, Mn, Tb, Mg, Pr, In and...
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Báo cáo hóa học: " Hydrothermal Synthesis, Microstructure and Photoluminescence of Eu3+-Doped Mixed Rare Earth Nano-Orthophosphates" pot
... thermogravimetry (TG) and differential scanning calorimetry (DSC) with a heating rate of 10°C min-1 Results and Discussion Experimental Section Crystal Phase and Microstructure of Mixed Rare Earth Phosphates ... (c) the mixed morphologies of the nanoparticles and nanorods (conglomeration of nanowires), which is consistent with the coexistence of the mixed hexagonal and tetragonal phases Rare earth orthophosphate ... phase structure of the mixed rare earth phosphates, indicating that pure LaPO4 and YPO4 crystallize in monoclinic phase and tetragonal phase, respectively, while the mixed phosphate of La0.5Y0.5PO4...
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4d transition metal doped lini0 5mn1 5o4 cathodes for high power lithium batteries
... PE -LiNi0. 5Mn1. 5O4, (b) PE -LiNi0. 4Ru0. 05Mn1. 5O4, (c) RF -LiNi0. 5Mn1. 5O4, (d) RF -LiNi0. 4Ru0. 05Mn1. 5O4, (e) PA -LiNi0. 5Mn1. 5O4 and (f) PA -LiNi0. 4Ru0. 05Mn1. 5O4 109 Fig 6.2 XRD results of (a) PE -LiNi0. 5Mn1. 5O4, ... PE -LiNi0. 5Mn1. 5O4, PE -LiNi0. 4Ru0. 05Mn1. 5O4, (b) RF -LiNi0. 5Mn1. 5O4, RF -LiNi0. 4Ru0. 05Mn1. 5O4, and (c) PA -LiNi0. 5Mn1. 5O4 and PA -LiNi0. 4Ru0. 05Mn1. 5O4 111 Fig 6.3 SEM morphology of PA -LiNi0. 5-2zRuzMn1 .5O4 ... (a) LiNi0. 5Mn1. 5O4, (b) LiNi0. 4Rh0. 05Mn1. 5O4 and (c) LiNi0. 425Rh0. 05Mn1. 5O4 86 Fig 4.3 Charge/discharge profiles of (a) LiNi0. 5Mn1. 5O4, (b) LiNi0. 4Rh0. 05Mn1. 5O4 and (c) LiNi0. 425Rh0. 05Mn1. 5O4...
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Multiphoton absorption and multiphoton excited photoluminescence in transition metal doped znsezns quantum dots
... nonlinear optical investigations of the multiphoton absorption (MPA) and multiphoton excited charge carrier dynamics in ZnSe/ZnS and transitionmetal -doped ZnSe/ZnS core/shell semiconductor quantum ... understanding of how the quantum confinement changes the spin-forbidden transitions in QDs The experiment setups and principles of Z-scan, pump-probe, and multiphotonexcited PL will be detailed in ... find the proper surfactants for certain kinds of transition- metal doping, and the second can only be 14 Chapter Introduction applied under high concentration doping Synthesizing Cu- and Mn-doped...
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Báo cáo hóa học: " Efficient manganese luminescence induced by Ce3+-Mn2+ energy transfer in rare earth fluoride and phosphate nanocrystals" docx
... doi:10.1186/1556-276X-6-119 Cite this article as: Ding et al.: Efficient manganese luminescence induced by Ce3+-Mn2+ energy transfer in rare earth fluoride and phosphate nanocrystals Nanoscale Research ... energy transfer in the prepared Mn2+-doped rare earth NCs The 4T1g(G)-6A1g(S) characteristic emission of Mn2+ reveals green luminescence in CeF :Mn and orange luminescence in CePO :Mn, resulting ... like MnF2 [27], the Ce3+-Mn2+ energy transfer offers an efficient route for obtaining Mn2+ RT luminescence in nanomaterials Similarly, the Ce3+ -Mn2+ energy transfer process in the CePO4:10%Mn...
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Báo cáo hóa học: "Influence of Rare Earth Doping on the Structural and Catalytic Properties of Nanostructured Tin Oxide" docx
... Sn#1000 Conversion/Selectivity (%) Conversion/Selectivity (%) ð1Þ The effects of the process of segregation and de-mixing of these rare earths on the SnO2 catalytic properties were studied and compared ... modification of the nanostructure and the basic sites of the particles Another phenomenon starts to occur on the surface of doped samples, a segregation process of particles of metastable solid solution, ... on the morphology and properties of tin oxide Rare earth cations have, as yet, been little explored as tin oxide dopants for catalytic purposes However, the consensus is that their influence on...
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Study on kinetics of electro-optical and photoluminescent processes in nanostructured transition metal (W, Mo) oxide-based thin films
... means of additional indicators Indeed, the results of a number of recent physical investigations on ligand - stabilized transition metal clusters, which a metal nanoparticles consisting of a defined ... the doping case considered in the last section Recombination and binding energies of the excitons confined in silicon nanocrystallites are calculated within the effective mass approximation This ... of an impurity band and localization due to disorder for x > 0.2, and (iii) splitting-off of an impurity band as a consequence of electron correlation and Anderson localization in a pseudogap...
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Electronic and magnetic properties of alkali and alkaline earth metals doped AIN bulk to surfaces
... and magnetic properties of alkali and alkaline earth metals doped AlN In chapter 3, the electronic and magnetic properties have been discussed for Mg and other alkali (earth) metals doped AlN In ... the prospect of magnetism in other alkali and alkaline earth metals doped AlN from bulk to various surfaces To find out the nature of magnetism from bulk to low-dimension, several factors have been ... origin and stability of ferromagnetism on various Mg doped AlN surfaces and (5) the applicability of observed magnetic phenomenon in Mg doped AlN for the case of other alkali and alkaline earth metals...
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Design and applications of phosphine ligands to transition metal catalyzed reactions
... development of new phosphine based chiral ligands derived from amino acids, including phosphine- amide ligands, phosphine- peptide vi ligands phosphine- olefin ligands and phosphine- imine ligands These ... DESIGN AND APPLICATIONS OF PHOSPHINE LIGANDS TO TRANSITION METAL- CATALYZED REACTIONS JIANG CHUNHUI (M.Sc., Nanjing Univ.) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... Phosphine- thiourea ligands from L-threonine 166 4.4.2.5 Phosphine- olefin ligands 167 4.4.2.6 Phosphine- imine ligands 168 4.4.3 General procedure for transition- metal- catalyzed reactions 169 4.4.3.1 Pd-catalyzed...
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Interface studies of rare earth oxides on silicon and germanium substrates
... dielectric constant.22,25 Table 2.1: Summary of the dielectric constant (k), band gap (Eg), conduction (CBO) and valence band offsets (VBO) on Si values for rare earth (RE) oxides and transition metal ... explanation as to why rare earth oxides form good interfaces with Ge 2.1.1 Rare earth oxides as second generation high-k dielectrics The criterion of thermodynamic stability on Si limits the choice of ... Publications 211 vii List of Tables List of Tables Table 2.1: Summary of the dielectric constant (k), band gap (Eg), conduction (CBO) and valence band offsets (VBO) on Si values for rare earth...
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Development of transition metal catalyzed c s and c c cross coupling reactions
... of cross- coupling reactions of aryl halides in the processes of C C, C N and C S bond forming reactions In this dissertation, we have developed new cross- coupling protocols for the synthesis of ... Suzuki and Heck couplings) reactions under mild conditions Chapter 2: Decarboxylative C S Cross- Coupling CHAPTER Synthesis of Vinyl Sulfides by Copper -Catalyzed Decarboxylative C S Cross- Coupling ... Introduction 1.2 Transition metal- catalyzed cross- coupling reactions The use of transition- metals as catalysts has brought a dramatic revolution in synthetic organic chemistry Since the discovery of...
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Group 10 and group 11 transition metal chemistry of benzimidazolin 2 ylidene and indazolin 3 ylidene ligands
... Pd1-S2 2. 35 19(18), Pd2-S1 2. 35 02( 17), Pd2-S2 2. 36 73( 16); C1-Pd1-C 12 92. 4 (2) , C 23- Pd2-C34 94.1 (3) , C1-Pd1-S1 90. 42( 16), C 12- Pd1S2 93 .24 (18), C 23- Pd2-S1 88 .10( 6), C34-Pd2-S2 94. 03( 19), C1-Pd1-S2 174 .27 (17), ... Benzimidazolin- 2- ylidene Imidazolidin -2- ylidene Topology unsaturated, aromatic benzannulated, aromatic saturated, nonaromatic (C2) [ppm] 21 1- 22 1 22 3 - 23 2 23 8 -24 5 Angle N1-C2-N3 [] 101 .2( 2) -1 02 .2( 2) 1 03 .5(1) -104 .3( 1) ... = 29 c n = Br N Au Cl N n 31 a n = 31 b n = 31 c n = N Au Br N n 32 a n = 32 b n = 32 c n = N Au Br N Br n 33 a n = 33 b n = 33 c n = X List of tables List of Tables Table 3. 1 Selected bond lengths and...
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Syntheses and catalysis of transition metal complexes with hemilabile ligands 1
... [P, O] ligands 19 ii 1. 4 .1. 1 Ni complexes 19 1. 4 .1. 2 Pd complexes 20 1. 4 .1. 3 Cr complexes 21 1.4 .1. 4 Rh complexes 22 1. 4.2 Reported complexes with ... 15 1. 3.2.4 Phosphine-imine ligands 17 1. 3.3 Bis(phosphine)amine ligands 18 1. 4 Complexes with mixed donor hybrid ligands of interest 19 1. 4 .1 Reported complexes with ... ligands 1. 3 .1. 1 Phosphine-ether ligands 1. 3 .1. 2 Phosphine-ester and phosphine-ketone ligands 11 1. 3 .1. 3 Phosphine-alcohol and phosphine-phenol ligands 12 1. 3 .1. 4 Phosphine-phosphonate...
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Syntheses and catalysis of transition metal complexes with hemilabile ligands
... enantioselective reduction of ketones to secondary alcohols They are nitrogenbased chelating ligands, diphosphines and heterobidentate [P, N] ligands 6.1.3.1 Nitrogen-based ligands A number of highly efficient ... The mixture of Pd2(dba)3, ligand and chloroform were made Preliminary analyses were performed on a one-pot reaction of Pd2(dba)3, ligand L1k in chloroform stirred at temperature of 60°C for h ... result of the hemilability of the ligands Table 5.1: Ligand effect on the Suzuki cross-coupling reactions of 1-bromo-2methylnaphthalene and 2-methylnaphthyl-1-boronic acid.a 1.2 mol% ligand 0.5mol%...
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First principles studies on the interactions between transition metal atoms, si(001), and nanotubes
... FIRST- PRINCIPLES STUDIES ON THE INTERACTIONS BETWEEN TRANSITION- METAL ATOMS, Si(001), AND NANOTUBES PENG GUOWEN (M.Sc., Dalian University of Technology) A THESIS SUBMITTED FOR THE DEGREE ... Cy Nz nanotubes, to examine the catalytic roles of transition- metal atoms during the growth of nanotubes and to design the functionalized nanotubes with transitionmetal atoms The study on the interaction ... given in Section 1.2, followed by the review of the interactions between transition- metal atoms, Si(001), and nanotubes in Section 1.3 1.2 Growth of Si-based MOSFETs and CNT-FETs To construct a...
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