structure and optical properties
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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Effects of simultaneous doping with boron and phosphorous on the structural, electronic and optical properties of silicon nanostructures
... effects of size and shape of Si-nc on the incorporation of group-III (B and Al), group-IV (C and Ge) and group-V (N and P) impurities Single-doping has been investigated both in spherical and faceted-like ... different sites labelled 1, and The lines are guide for the eye The structural, electronic and optical properties of Si nanostructures doped with different numbers of B and P impurities have been ... concentrating not only on the structural properties but also on how doping influences the electronic and optical properties Here, we aim to resume the main outcome of this work and illustrate specific results...
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synthesis and optical properties of colloidal tungsten oxide nanorods
... localized states in the band gap due to impurities.22b In light of these assignments, we suggest that the UV emission of nanorod samples in this work might correspond to the band-toband transition The ... presumably, due to its irrelevance to the band structures of the tungsten oxide system In summary, we have reported the first solution-based preparation of soluble and highly crystalline tungsten oxide ... and the intensity of this peak increases relative to that of UV emission as the length of nanorods increases A similar PL pattern with two emission maxima, yet at much lower energies of 2.8 and...
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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 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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fabrication and optical properties of ordered sea urchin-like zno
... image and SAED pattern of the sea urchin-like ZnO nanostructures are presented in Fig Fig 2a and b displays the low magnification and high magnification SEM images of the sea urchin-like ZnO nanostructures, ... diffraction pattern (a) and UV–visible optical absorption characteristics (b) of the sea urchin-like ZnO nanostructures Fig SEM images (a,b), TEM image (c), HRTEM image (d) and SAED pattern (e) ... analyzing the photoelectric properties of the sea urchin-like ZnO nanostructures, simple battery devices were fabricated Fig shows the I–V curve of the sea urchin-like ZnO nanostructures based DSSCs...
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synthesis and optical properties of au-ag alloy nanoclusters with controlled composition, p26
... been paid to the synthesis and characterization of bimetallic nanoparticles due to their unique catalytic, electronic, optical, structural and thermal properties [1-5] and subsequent technological ... composition and their structures on their catalytic properties [15-19] Au-Ag nanoparticles of alloy type structure exhibit high catalytic activities for low-temperature CO oxidation [18, 20] and aerobic ... [37] Optical and structural properties of the samples were studied using optical absorption spectroscopy in the UV-Vis range, transmission electron microscopy (TEM), high resolution TEM (HREM), and...
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Báo cáo toán học: " The structural and optical properties of GaSb/InGaAs type- quantum dots grown on InP (100) substrate" ppt
... structural and optical properties of type-II GaSb/InGaAs quantum dots [QDs] grown on InP (100) substrate by molecular beam epitaxy Rectangular-shaped GaSb QDs were well developed and no nanodash-like structures ... investigated the structural and optical properties of self-organized type-II GaSb/InGaAs heterostructure QDs grown on InP (100) using MBE Formation of type-II GaSb/InGaAs heterostructure QDs centered ... powers and the fitting curve of the peak energies with the third root of the excitation power Figure Schematic band diagrams (a) Bulk GaSb/InGaAs heterostructures and (b) GaSb/InGaAs QD nanostructures...
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Báo cáo toán học: " Structural and optical properties of ZnS thin films deposited by RF magnetron sputtering" potx
... value The optical band gap of the film deposited at 100°C was 3.45 eV As the growth temperature increased from 200°C to 350°C, the optical band gap red-shifted from 3.57 to 3.79 eV The band gaps ... manuscript JHA analyzed the properties and helped draft the manuscript KNH and KSH detailed the original idea and modified the first draft of manuscript YGS finalized the manuscript and supervised the ... migration of the sputtered atoms, thus forming a denser film with larger grains and lower defects Optical properties The optical transmittance spectra in the wavelength range of 200 to 1,100 nm of...
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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: " Effects of silver impurity on the structural, electrical, and optical properties of ZnO nanowires" doc
... structural and (a) (b) optical properties of the nanostructures were investigated by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and low temperature ... were cleaned in acetone and methanol for 20 and rinsed in de-ionized water for The 1, 3, and wt % SZO (5SZO) NWs are grown in a furnace at 800°C with argon gas of 90 sccm and a working pressure ... very sensitive tool for the characterization of acceptor/donor impurities and is helpful in understanding the optical and electrical performances of the materials We focused on the temperature-dependent...
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Báo cáo hóa học: " Synthesis, magnetic and optical properties of core/shell Co1-xZnxFe2O4/SiO2 nanoparticles" pot
... nanoparticles (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 ... functional groups [32,33] Also, the silica shell can enhance the optical properties of the nanoparticles [34] The optical properties of the nanostructures have been investigated earlier using many techniques, ... important role on the optical properties enhancement The firing temperatures as well as the crystallite size parameters have great effect on the magnetic and the optical properties of core/shell...
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Báo cáo hóa học: " Fe3O4–Au and Fe2O3–Au Hybrid Nanorods: Layer-by-Layer Assembly Synthesis and Their Magnetic and Optical Properties" pptx
... 500 and 700 cm-1, which is different from Fe3O4 [40, 41] The IR analysis combined with TEM images and XRD pattern can confirm the synthesis of a-Fe2O3–Au and Fe3O4–Au hybrid nanorods Fe3O4–Au and ... combined magnetic and optical properties, which originate 123 1758 Nanoscale Res Lett (2010) 5:1755–1761 Fig a, b Infrared spectra of FeOOH nanorods (curve a) before layer-by-lay assembly and (curve ... resonance band at around 520 nm [44] The exact absorption varies with nanoparticles morphology and particle surface coating Herein, compared to pure Fe3O4 and aFe2O3 nanorods, both Fe3O4–Au and a-Fe2O3–Au...
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Báo cáo hóa học: " Effect of Composition on Electrical and Optical Properties of Thin Films of Amorphous GaxSe1002x Nanorods" pptx
... applications for frequency doubling and fast optical gating [11] and behaves as an X-ray detector [12] Electronic and optoelectronic properties of GaSe, GaS, and InSe materials indicate the possibilities ... electrical and optical properties of this compound in thin film formation Since the optimization of device performance requires a well-established knowledge of the electrical and optical properties ... in the band structure is responsible for the decrease in optical band gap on increasing the dopant concentration in these amorphous films of GaxSe100-x nanorods This decrease in optical band gap...
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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:" Structural and optical properties of a radio frequency magnetron-sputtered ZnO thin film with different growth angles" pdf
... contributions Y-HJ and WSC participated in the sequence alignment and drafted the manuscript K-HK and MP carried out the sample preparation JL and H-SH performed data acquisitions and analysis All ... growth angles ZnO films at (a-1) 0°, (b-1) 15°, and (c-1) 30° growth angles and their enlarged images (a-2, b-2, and c-2) Figure shows the XRD patterns and grain sizes of the ZnO films according to ... the 0° and 30° angle reflectances tended to increase compared with that of the 15° angle reflectance Conclusions We investigated the optical properties of antireflection coating on columnar structured...
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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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