synthesis and characterization of nitrogen doped zno films grown by mocvd
Synthesis and characterization of lanthanide doped nanophosphors
... SYNTHESIS AND CHARACTERIZATION OF LANTHANIDE DOPED NANOPHOSPHORS BY HUANG HAI (B.Eng.) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMISTRY NATIONAL UNIVERSITY OF ... concurrence of two developments: (1) an understanding of the optical spectra of the lanthanides derived from many experimental studies and theoretical treatments of crystal fields and of radiative and ... improve green emission and color purity of Tb:Y2O3 Tb3+ has enhanced intensity of emission in La2O3 In terms of XPS study of Tb,Ce:Y2O3, the presence of a large number of Tb4+ and C=O, O-H or H-C=O...
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Nitrogen doped ZnOfilm grown by the plasma-assisted metal-organic chemical vapor deposition pot
... substrate Since our ZnO film is relatively Fig Raman spectra of ZnO films and ZnO powder (a) Raman spectrum of non -doped ZnO film; (b) Raman spectrum of N -doped ZnO film; (c) Raman spectrum of ZnO powder ... logarithmic scale (a) Nondoped ZnO film; (b) N -doped ZnO film Fig Low temperature PL spectra of ZnO film (a) Non -doped ZnO film; (b) N -doped ZnO film dominant photoluminescence of our sample should be ... optical qualities and found that the nitrogen doped (N -doped) ZnO film shows better crystal quality and higher resistivity relative to the non -doped one Experiment ZnO film was grown by MOCVD on (0 0...
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Báo cáo hóa học: " Direct Synthesis and Characterization of Optically Transparent Conformal Zinc Oxide Nanocrystalline Thin Films by Rapid Thermal Plasma CVD" pptx
... measurements of 20-nm- and 200-nm-thick ZnO films show a high optical transmittance at spectra 375 nm and above, which corresponds to the optical bandgap of ZnO Thermal annealing of ZnO films at ... http://www.nanoscalereslett.com/content/6/1/568 Page 10 of 12 Figure Optical properties and grain structure of 20-nm- and 200-nm-thick ZnO films (a) Optical transmittance of 25 samples of 200-nmthick ZnO film deposited on borosilicate ... Morphologies of ZnO films deposited on ceramic and metal substrates The morphologies of ZnO films deposited on (a) p-type Si(100), (b) muscovite, (c) gold, and (d) titanium at a substrate temperature of...
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Báo cáo hóa học: " Synthesis and characterization of aligned ZnO/ BeO core/shell nanocable arrays on glass substrate" pdf
... emission intensities of ZnO in core/shell sample originates from the type I band alignment between ZnO and BeO, in which the valence band maximum of BeO is of lower energy than that of ZnO, while the ... conduction band minimum of BeO is of higher energy than that of ZnO [32] In such case, a potential well for both electron and hole is formed and the exciton is confined in the core material, and thus, ... modulation of BeZnO layers grown by RF co-sputtering of ZnO and Be targets J Mater Sci 2010, 45:130-135 24 Yu JH, Kim JH, Park DS, Kim TS, Jeong TS, Youn CJ, Hong KJ: A study on structural formation and...
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Báo cáo hóa học: "Synthesis and characterization of VO2-based thermochromic thin films for energy-efficient windows" pdf
... derivative of both curves of the hysteresis loops (heating and cooling) and considering the mean value Results and discussion Structural characterization The crystal structure of the three sets of films ... Page of Figure XRD spectra of VO2 films deposited by (a1-a3, b4-b6) DC and (c7-c10) pulsed-DC sputtering, doped with different dopant element and contents: (a1) pure VO2, (a2) V0.97W0.03O2, and ... chemical vapor deposition of tungsten -doped vanadium dioxide Chem Mater 2004, 16:744 Jin P, Nakao S, Tanemura S: Structural and optical characterization of VOx films doped with W by ion implantation...
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Báo cáo hóa học: " Synthesis and Characterization of ZnO Nanowire–CdO Composite Nanostructure" docx
... concentration and high optical transmittance in the visible region of the solar spectrum By alloying with CdO, which has a cubic structure and a narrower direct band gap of 2.2–2.5 eV, the band gap of ZnO ... spectra (DRS) of a ZnO NWs and b ZnO NW–CdO composites The inset shows the digital photograph of the ZnO NW and ZnO NW–CdO composite samples Preliminary experiments were carried out using ZnO NW–CdO ... obtained from the as -grown ZnO NWs and ZnO NW–CdO composite structure were shown in Fig 2a, b, respectively As -grown ZnO NW sample showed major XRD peaks at 2h of 34.54° and 62.98° that can be...
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Báo cáo hóa học: " Synthesis and Characterization of ZnO Nanorods and Nanodisks from Zinc Chloride Aqueous Solution" pptx
... (002) peak of the sample prepared by calcination showed higher intensity than those of (100) and (101) peaks, indicating the preferred orientation of ZnO particles, remember usually the ZnO possessed ... morphology and crystalline phase of the product by the heat treatment of ZnCl2–HMT aqueous solution with and without EG changed greatly depending on the concentrations of Zn2? ion and EG additive ... inferred that the high concentration of zinc ion and chloride ion preferred to form simonkolleite structure Since the formations of ZnO and Zn5(OH)8Cl2 Á H2O shown by Eqs 1–3, might proceed competitively...
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Báo cáo hóa học: " Synthesis and Characterization of Aromatic–Aliphatic Polyamide Nanocomposite Films Incorporating a Thermally Stable Organoclay" potx
... many of the former group can be made by melt and plasticized melt methods [32, 33, 39] or by standard interfacial procedures [35, 37, 40] The aromatic–aliphatic polyamides, on the other hand are ... spacing of 1.886 nm Data indicate that stiff and long chain structure of oligomer leads to the greater d-spacing of montmorillonite helping for the intercalation of polyamide into interlayers of clay ... on the other hand are difficult to prepare by interfacial and solution methods [30, 41] and when prepared by melt methods, frequently are discolored and may have branched or network structures...
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Tài liệu Báo cáo "Preparation and characterization of nanocomposite TiO2/SnO2 films " pdf
... evaporation of solvents and volatile products, took place simultaneously with the deposition process, caused the porosity of the TiO2 films Prepareation of TiO2/SnO2: After the material characterization ... Because of porous structure, the TiO2 films were coated by using the sol-gel method The films were impregnated in the sol prepared from SnCl4 When the films had been dried, they were followed by annealing ... results, impregnations were carried out by varying concentration of the SnCl4 solution, and the films were annealed at different temperatures and for different period of time Photoconductivity measurement...
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![Tài liệu Báo cáo khoa học: Specific targeting of a DNA-alkylating reagent to mitochondria Synthesis and characterization of [4-((11aS)-7-methoxy-1,2,3,11a-tetrahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-on-8-oxy)butyl]-triphenylphosphonium iodide doc](https://media.store123doc.com/images/document/14/br/vp/small_vpv1392870032.jpg)
Tài liệu Báo cáo khoa học: Specific targeting of a DNA-alkylating reagent to mitochondria Synthesis and characterization of [4-((11aS)-7-methoxy-1,2,3,11a-tetrahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-on-8-oxy)butyl]-triphenylphosphonium iodide doc
... driven by the large mitochondrial membrane potential, and addition of a TPP-moiety has been used to drive the selective uptake of a wide variety of Ó FEBS 2003 Fig Selective uptake of mitoDC-81 by ... the vicinity of mtDNA with the resultant binding and selective alkylation leading to a depletion of mtDNA in intact cells (Fig 1) Here we report the synthesis and characterization of a novel mitochondria-targeted ... cells The reasons for the lack of alkylation of mtDNA within mitochondria by mitoDC-81 are unclear The local concentrations of mitoDC-81 and DNA, and the duration of the experiments were ample...
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Báo cáo khoa học: Synthesis and characterization of a new and radiolabeled high-affinity substrate for H+/peptide cotransporters pdf
... parameters and transport characteristics of Bip-[3H]Pro Results and Discussion Synthesis, chemical characterization and stability of Bip-Pro Figure shows the structure (Fig 1A) and the synthesis ... suggesting a competitive mode of action Uptake of Bip-[3H]Pro by SKPT cells After characterization of Bip-Pro as a very high-affinity and enzymatically stable substrate of PEPT1 and PEPT2, the compound ... concentrations and at increasing Bip-Pro concentrations The diffusional component of [14C]Gly-Sar uptake, of 8% in Caco-2 cells and of 4% in SKPT cells, measured in the presence of excess of Gly-Sar...
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Synthesis and characterization of silicon nanowires using tin catalyst for solar cells application
... morphological property of SiNWs, a FE-SEM observation was carried out after synthesis of SiNWs Fig 1(b) shows the topview (15° tilted) and cross-section (see inset of Fig 1(b)) FE-SEM images of the SiNWs ... at λ b 700 nm [20] The difference of the reflectance might be the effect of synthesis conditions, such as thickness of metal film and SiH4 gas flow The reduction of reflectance is very helpful to ... Therefore, further reduction of the reflectance will be expected from the optimization of the synthesis conditions of SiNWs For analysis of the electrical properties, the I–V curve of the fabricated SiNWs...
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Synthesis and characterization of semiconducting nanowires for gas sensing
... investigation of the termination of the nanowire lateral sides and apex Electron diffraction (ED) and analysis of zero-order and higher-order Laue-zones allows precise determination of unit cell and space ... nanowire, (d) STEM-HAADF image of a nanowire, and (e) linescan of the HAADF signal (solid line) and numerical fit of the shape of the nanowire (dashed line) As both composition and phase can be considered ... Characteristics of ZnO nanowires: (a–c) variation of the size for the ZnO nanowires for different growth conditions, (d) TEM image of ZnO crystalline nanowire, (e) high-resolution TEM image of the hexagonal...
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Báo cáo khoa học: Synthesis and characterization of Pi4, a scorpion toxin from Pandinus imperator that acts on K+ channels doc
... by four salt bridges between the sidechains of Glu332 of each rat Kv1.2 a-subunit (Kv1.2 channel is composed of four a-subunits) and Arg10, Arg19, Lys30 and Lys33 of Pi4 The Lys26 sidechain of ... from that of maurotoxin Of note, the disulfide bridges of natural Pi4 have been determined by NMR and structure calculations, as well as by Edman sequencing/mass spectrometry identification of peptides ... 270) Fig Functional map of Pi4 towards rat Kv1.2 channel, and comparison with that of Pi1 Functional maps of Pi4 [1] and Pi1 [5–7] (A and B, respectively) The structures of scorpion toxins are...
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facile synthesis and characterization of novel nanocomposites
... properties of rutile nanocrystals and most morphology and mechanical properties of titanate nanotubes The phase structures of the nanocomposites were confirmed by the XRD patterns of the samples ... large amount of water and hydroxyl groups existed in the tubular products because of the existence of a bending vibration of H O H at 1630 cm−1 , and a strong stretching vibration of O H Fig EDX ... synthesized by a simple hydrothermal reaction of bulky rutile powders and 10 M NaOH solution without using any templates and catalysts The inner and outer diameters of the nanotubes were approximately and...
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hydrothermal synthesis and characterization of - feooh and fe2o3 uniform nanocrystallines
... / Journal of Alloys and Compounds 433 (2007) 216–220 Fig (A) TEM image of the sample produced at 140 ◦ C for h (B) TEM image of the sample produced at 140 ◦ C for h The insets of (A and B) show ... phase of hematite ␣-Fe2 O3 and exhibits that each porous fusiform ␣-Fe2 O3 nanocrystalline was a single crystal Fig 5A and B shows scanning electron microscope images of a typical sample of fusiform ... Acknowledgements Financial support of this work by National Natural Science Foundation of China (Grant no 50504017) and Hunan Provincial Natural Science Foundation of China (Grant no 05JJ30104) is...
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hydrothermal synthesis and characterization of self - assembled h - wo3
... control over the shapes of nanowire bundles and nanorods, allowing the formation of urchin-like crystalline h-WO3 via simple substitution of NH4 + in place of Na+ ions of EDTA salt solutions Experimental ... voltammograms of (a) h-WO3 nanowire bundles, and inset Figure, CV curves of urchin-like, were measured in 0.1 M H2 SO4 at a scan rate of 100 mV/s for 10 cycles and (b) CV curves of h-WO3 urchin-like ... confirmed by XRD and TEM analyses SEM and TEM images revealed self-assembled nanowire bundles and nanorods that formed urchin-like structures The shapes of the hWO3 nanowire bundles and urchin-like...
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hydrothermal synthesis and characterization of some polycrystalline iron oxides
... intensity of the second and ®fth lines of the spectra, in the case of oxides This behaviour can be explained by the preferential orientation of the platelike particles, parallel to the surface of the ... ®ltered and then oxidised by drying at 110 C in air F Another path in the hematite synthesis was the direct hydrothermal treatment of an homogeneous mixtures of ferric nitrate (1 M) and urea ... enhancement of the M lines can be a measure of the orientation of the particles at the surface of the green body To illustrate, Fig shows (a) the transmission and (b) CEMS spectrum of the platelike...
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hydrothermal synthesis and characterization of tio2 nanorod arrays on glass substrates
... FE-SEM images of TNAs grown on PT-substrate at an annealing temperature of 700 8C and at a hydrothermal growth temperature of 160 8C and growth time of h (a) PT-substrate; (b) top view of TNAs; (c) ... distribution of TiO2 nanorods grown on PT-substrate at an annealing temperature of 700 8C and at a hydrothermal growth temperature of 160 8C and with growth time of h Fig SEM image of TiO2 nanorod ... TEM images of TiO2 nanorods grown on PT-substrate at an annealing temperature of 700 8C and at a hydrothermal growth temperature of 160 8C and with growth time of h (a) TEM image and the associated...
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synthesis and characteristics of fe3+-doped sno2 nanoparticles via
... 350, 600, and 800 ◦ C, respectively Typical diffraction patterns obtained from samples of pure SnO2 and 10% Fe3+ doped SnO2 are shown in Figs and The grain sizes of SnO2 calculated by Scherrer ... grain size of 10% Fe3+ - Fig XRD patterns of Fe3+ -doped SnO2 nanoparticles: (a) SGC series and (b) SGH series pound Because of the interference of Fe3+ with SnO2 lattice, the crystallinity of the ... addition of Fe3+ significantly influenced the crystallinity of SnO2 Fig suggested a decrease of crystallinity in the Fe3+ -doped SnO2 nanoparticles in comparison with the undoped sample by the decrease...
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