cryochemical synthesis structure and physicochemical properties
synthesis, structure and magnetic properties of iron-doped tungsten oxide nanorods
... temperature and vanishes at 1000 K Among all iron oxides, Fe3O4 and g-Fe2O3 exhibit the largest saturation magnetization of 84 and 74 Am2/kg, respectively The slightly decreasing feature between 800 and ... Science Foundation of China (Grants nos 59725103, 50332020, and 50171070), and the scientific exchange program between China and The Netherlands References [1] A Hoel, L.F Reyes, P Heszler, V Lantto, ... WO2 and part of the W could be oxidized to WO3 after air annealing at 573 K Iron and its oxide could be indexed in the XRD patterns of both samples However, the weak diffraction peaks for iron and...
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Báo cáo hóa học: "Synthesis, structure and magnetic properties of b-MnO2 nanorods" pptx
... magnetic properties of the b-MnO2 nanorods and demonstrate the important role of the surface layer in the rich temperature-dependent magnetism of this material Synthesis and characterization The synthesis ... cubic MnO and tetragonal Mn3O4 nanowires was reported to be the final product of a synthesis involving thermal evaporation of MnCl2 under argon flow, and the nanowires showed unusual magnetic properties ... strength and then 50 ml of the solution was sealed in an 80 ml teflon-lined autoclave Hydrothermal synthesis was performed at 100 °C for 48 h The product was filtered and rinsed with ethanol and dried...
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Synthesis, structure and magnetic properties of nanowires and films by electrodeposition
... 4.2.1 Structure and microstructure of Ni nanowires………………………… 87 4.2.2 Magnetic properties of Ni nanowires………………………………… 91 vii 4.3 Co nanowires……………………………………………………………… 93 4.3.1 Structure and microstructure ... can show two unique nanostructures They were bamboolike and layer-like structures The bamboo-like and layer-like structures were found at atomic percentage of Co 15% and 25%, respectively The ... and microstructure of NiCu alloy nanowires……………… 126 5.2.2 Magnetic properties of NiCu alloy nanowires…………………… 129 5.3 CoCu alloy nanowires……………… …………………………………… 130 5.3.1 Structure and microstructure...
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Tài liệu Báo cáo " The effect of cobalt substitution on structure and magnetic properties of nickel ferrite " pptx
... (222), (400), (422), (511) and (440) These planes are indications of the presence of a spinel cubic structure The diffraction lines corresponding to a cubic, spinel-type and crystalline phase provides ... cell and N is the Avogadro’s number Since each primitive unit cell of the spinel structure contains molecules, the X-ray density, ‘D X’ was determined according to the following relation and is ... X-ray, θ the angle between the incident and diffracted beams (degree) and d the particle size of the sample (nm) (in Table 1) 3.2 FT-IR spectroscopy The band wavenumber v1 , v2, (Table 2) generally...
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Báo cáo khoa học: Crystal structure and enzymatic properties of a bacterial family 19 chitinase reveal differences from plant enzymes pdf
... enzyme with respect to its catalytic properties and crystal structure The crystal structures of ChiG and ChiC [18] permitted structural comparison between bacterial and plant enzymes, which provided ... extended towards Cys183 in ChiC (and in the plant enzymes) Compared to the barley enzyme, ChiC and ChiG lack three loops (A, B and C) and a C-terminal extension (Figs and 4B) In addition, one other ... experiments and helpful discussions, and May Bente Brurberg and Svein Horn for helpful discussions The authors acknowledge the beamline staff at ID14-EH3 for technical assistance, and the ESRF and the...
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Large scale synthesis, characterization and photoluminescence properties of amorphous silica nanowires by thermal evaporation of silicon monoxide
... core-shell kind of structure as seen by Park and Yong [13] and Zhang et al [23] was observed This reveals that the nanowires have uniform amorphous structure across the length and diameter EDAX ... crystalline Si core and amorphous SiO2 outer shell structure as confirmed by HRTEM image and SAED pattern On the other hand, the formation of crystalline Si–SiO2 core-shell nanowires first and then complete ... a base pressure of 3.0 Â 10À6 Torr The source SiO and the substrates were inserted in the tube and kept at locations at $1200 1C (center zone) and $1000 1C (in the direction of carrier gas flow),...
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Báo cáo khoa học: Quaternary structure and functional properties of Penaeus monodon hemocyanin docx
... essential in order to obtain quaternary structures larger than hexamers, and that different quaternary structures exhibit different cooperative and allosteric properties [18,41,42] Furthermore, the ... in Table 1, C or I, and, to some extent, also I* and C* The lower stability of Hc from nonpeneid Crustacea yields a structure where divalent ions (such as Ca2+ and Mg2+) and pH regulate the oligomerization ... Beltramini et al P monodon hemocyanin structure and function equilibrium constant, lo, describes the ratio of conformations r and t in the absence of ligand: lo ¼ ½t0 ½r0 Three-state MWC...
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Báo cáo khoa học: H NMR study of the molecular structure and magnetic properties of the active site for the cyanomet complex of O2-avid hemoglobin from the trematode Paramphistomum epiclitum pdf
... Hemoglobin and Myoglobin and Their Reactions with Ligands Elsevier, North-Holland Publishing, Amsterdam, the Netherlands Dickerson, R.E & Geis, I (1983) Hemoglobin: Structure, Function, Evolution and ... in the crystal structure of Pe metHbH2O [16] and as conrmed herein by solution 1H NMR of Pe metMbCN Proximal and distal residues are shown as rectangles and circles, respectively, and arrows connecting ... ligand to participate in H-bonding to the ligated cyanide The van der Waals surfaces for the Tyr32(B10) Og and the 10 tilted cyanide ligand are shown in Fig and establish that the Tyr Og and...
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Báo cáo toán học: " Structure and electrical properties of sputtered TiO2/ZrO2 bilayer composite dielectrics upon annealing in nitrogen" pdf
... that the structure includes the two layer stacks of TiO2 and ZrO2 films and that the interface layer is observed between the ZrO2 film and the Si substrate The physical thickness of ZrO2 and TiO2 ... 22(4):1342 19 Zhao X, Vanderbilt D: Structural and dielectric properties of amorphous ZrO2 and HfO2 Phys Rev B 2006, 74:12108 20 Wong H, Iwai H: On the scaling issues and high-κ replacement of ... strain and dielectric properties in ZrTiO4 thin films Appl Phys Lett 2000, 76:3043 22 Wang H, Wang Y, Feng J, Ye C, Wang BY, Wang HB, Li Q, Jiang Y, Huang AP, Xiao ZS: Structure and electrical properties...
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Báo cáo hóa học: " Synthesis, magnetic and optical properties of core/shell Co1-xZnxFe2O4/SiO2 nanoparticles" pot
... (Co1-xZnxFe2O4; x = 0, 0.5, and 1) and shelling with silica on the magnetic and optical properties of the ferrite nanoparticles for a variety of magneto-optical nanodevice applications From a synthesis point ... Co0.5Zn0.5Fe2O4/SiO2, and ZnFe2O4/SiO2 particles were separated using external magnet, and washed with ethanol and water several times The samples have been dried at 40°C for 24 h and fired at temperatures ... with silica shell and fired at 400°C show a ferromagnetic behavior and high diffuse reflectance compared with all uncoated and coated nanoparticles due to the presence of zinc ions and the silica...
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Báo cáo hóa học: " Aqueous Solution Preparation, Structure, and Magnetic Properties of Nano-Granular ZnxFe32xO4 Ferrite Films" potx
... ions and both the O and the ions in A sites and not contain the vibration of the ions in B sites at all [23, 24] Figure shows the Raman spectra measured at 293 K for the Fe3O4, Zn0.41Fe2.59O4, and ... was fitted by two peaks at 648 and 679 cm-1 In fact, the Raman modes at 653 and 648 cm-1 are ascribed to the oxygen breathing vibrations against zinc; and the 681 and Fig The top view SEM micrographs ... DMABFe(NO3)3-Zn(NO3)2 solutions at 80°C by adjusting the Zn(NO3)2 concentration The dependence of structure and magnetic properties of the ZnxFe3-xO4 ferrite films on the Zn content was studied 1519 diffraction...
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báo cáo hóa học:" Crystal structure and electrical properties of bismuth sodium titanate zirconate ceramics" pdf
... that the observed dielectric and ferroelectric properties of BNTZ ceramics largely depended on compositional and crystal structure changes Optimization of these properties could be achieved by ... zirconate experiment and analysis and drafted the manuscript PJ participated as the assistant for the research experiment AW and SJ participated in the conception and design of the study and revised the ... PANalytical B.V., Almelo, The Netherlands) with CuKa radiation was used to investigate the phase and crystal structure of the sintered ceramics The preliminary crystal structure details were calculated...
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Báo cáo hóa học: " Structure and Photoluminescent Properties of ZnO Encapsulated in Mesoporous Silica SBA-15 Fabricated by Two-Solvent Strategy" doc
... three emission bands assigned to the UV band-edge emission (368 nm), the violet emission (420 nm), and the blue emission (457 nm) The blue shift of the UV band-edge emission and the blue emission ... 380 nm and the visible emission band ranging from 440 to 600 nm [34] In general, the emission band in the visible region is associated with structural defects in ZnO [5] The UV near-band-edge ... interface traps and the valence band Similar results have also been reported in the ZnO/SBA-15 Nanoscale Res Lett (2009) 4:646–654 nanocomposite [12] The weak and broad blue emission band centered...
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Báo cáo khoa học: "Molecular structure and biochemical properties of lignins in relation to possible self-organization of lignin networks" pdf
... the structure and functions of plant cell walls Reticulation may be of importance in durability and mechanical properties, as recently discussed in the case of cell wall proteins by Cassab and ... detail, heterogeneity in lignin formation and molecular structure, has been demonstrated in the case of gymnosperms (Terashima and Fukushima, 1988) and in the case of angiosperms (Higuchi, 19135; ... with species The biosynthesis of the precursors and the regulation of lignification most likely occurs within individual cells and variations are observed according to the type and the age of cells...
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Structure and magnetic properties of ni nio, co coo composite films
... understanding of the magnetic properties of Ni and NiO in the amorphous or disordered, cluster, nanocrystalline and well crystalline states and the understanding of the exchange coupling and magnetic ... ………………………………… 73 4.3.1 Synthesis of fully amorphous NiO by sputtering 73 4.3.2 Synthesis of NiO in the cluster and nanocrystalline structure (Coprecipitation and subsequent annealing) ... Ding, Y P Feng, and J.Y Lin, “Magnetic properties of single crystalline Ni and Co nanowires”, J Phys Chem B 109, 3098 (2005) J.B Yi, J Ding, Z.L Zhao, and B.H Liu, “High coercivity and exchange...
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The effects of additional nonmagnetic layers on structure and magnetic properties of l10 fept thin films
... changed from a continuous maze-like structure to an isolated island structure The formation of the island structure may realize the decoupling between FePt particles and cause the change of magnetization ... Table 6-I Layer structure and magnetic properties of FePt films with different thicknesses of Ag intermediate layers and different deposition conditions Table 7-I FePt film structures and coercivity ... without Ag top layer and with 0.25 nm and nm Ag top layers Figure 5-6 TEM images and SAED patterns of the FePt films without Ag top layer (a and c) and with nm Ag top layer (b and d) Figure 5-7...
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SYNTHESIS, STRUCTURE AND CATALYTIC APPLICATION OF NOVEL CARBENE COMPLEXES WITH BENZOTHIAZOLIN 2 YLIDENE LIGANDS 1
... Benzothiazolin-2-ylidene Ligands Chapter One: Introduction Project Aims and Thesis Overview and other auxiliary ligands (phosphine, aromatic N-heterocycle, pyridyl- and azole ligands) and their use in catalysts ... alkoxyphenylcarbene ligand is 17 Synthesis, Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter One: Introduction Preparative methods for NSHC- and NNHC- ... Ag O and carbene precursors and they have become widely used carbene transfer 18 Synthesis, Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands...
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SYNTHESIS, STRUCTURE AND CATALYTIC APPLICATION OF NOVEL CARBENE COMPLEXES WITH BENZOTHIAZOLIN 2 YLIDENE LIGANDS 2
... described and compared 55 Synthesis, Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter two: Results and Discussion Part I 2.4 Synthesis and ... 42 Synthesis, Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter two: Results and Discussion Part I 2.3 Synthesis of Mono-, Bis- and ... bromo, and two bridging µ48 Synthesis, Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter two: Results and Discussion Part I bromo ligands...
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SYNTHESIS, STRUCTURE AND CATALYTIC APPLICATION OF NOVEL CARBENE COMPLEXES WITH BENZOTHIAZOLIN 2 YLIDENE LIGANDS 3
... 168 Synthesis, Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter Three: Experimental Experimental 3.2.4 Synthesis of Complexes 2.2(b) and ... 5.15; S, 5.83 166 Synthesis, Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter Three: Experimental Experimental 3.2.3 Synthesis of Complexes ... parameters and one of them is disordered into two positions at a 50:50 ratio 161 Synthesis, Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter...
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SYNTHESIS, STRUCTURE AND CATALYTIC APPLICATION OF NOVEL CARBENE COMPLEXES WITH BENZOTHIAZOLIN 2 YLIDENE LIGANDS 4
... N-heterocycle ligands (less donor ability co-ligands) while a downfield shift is observed for phosphine ligands (more donor ability co-ligands) 210 Chapter Four S N Conclusion and Summary P S ... Sections 2.4-2.8 discusses the synthesis and characterization of a range of mixed-NSHC-L Pd(II) complexes (L = phosphine, aromatic N-heterocycles, pyridyl and azole ligands (2.9-2.27)) They are obtained ... orientation and significantly on the inter-planar angle between the Pt coordination and the heterocycle planes Finally, the five- and six-membered fused-ring imidazolium, thiazolium and benzimidazolium...
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