Báo cáo vật lý: "FORMATION AND MORPHOLOGY OF COLLOIDAL CHITOSAN-STABILIZED COPPER SULFIDES" pdf

... Figure 5: Raman spectrum of CuS nanoparticles Journal of Physical Science, Vol. 18(1), 87–101, 2007 87 FORMATION AND MORPHOLOGY OF COLLOIDAL CHITOSAN-STABILIZED COPPER SULFIDES H.T. Boey, ... confirmed these copper sulfides. The effects of chitosan on the morphology of the copper sulfides were studied via TEM and SEM microscopy. In the absence of chitosan, fractal morphology was ... (a) TEM micrograph of copper sulfides exhibiting fractal structure and (b) a plot of log10 N against log10 l Figure 9: SEM micrograph of copper sulfides Journal of Physical Science,...

Báo cáo vật lý: "Synthesis and Characterization of Bismuth Tantalate Binary Materials for Potential Application in Multilayer Ceramic Capacitors (MLCC)" doc

... the bulk (grain) property of the material arising due to the parallel combination of bulk resistance (Rb) and bulk capacitance (Cb) of the material. The capacitance of the sample is about ... Figure 9 shows the plots of real part of complex permittivity of BiTaO4 ceramics as a function of sintering temperature. The εr increases appreciably with the increase of temperature. The temperature ... spectroscopic plots of the imaginary components of the impedance (Z'') and electric modulus (M''), as shown in Figure 7. The frequency maxima of Z'' and M''...

Báo cáo vật lý: "Flexural and Morphological Properties of Epoxy/Glass Fibre/SilaneTreated Organo-montmorillonite Composites Nor Hamidah Mohd" potx

... strength of the E/GF composites with the addition of silane-treated OMMT. According to Lin et al.,5 the clays were dispersed between both the bundles of GF and within the interstices of the ... reaction uses alkoxysilanes and exploits the -OH reactive sites of the MMT structure. In this research, we investigate the mechanical and morphological properties of E/GF/3-aminopropyltrimethoxysilane-treated ... (Switzerland). The GF was in the form of a chopped strand mat (CSM). The OMMT (Nanomer 1.30E) was supplied by Nanocor, USA. The 3-aminopropyltrimethoxysilane with a molecular weight of 179.29...

Báo cáo vật lý: "Protonation and Complexation Approaches for Production of Protic Eutectic Ionic Liquids" ppsx

... reveal that a double molar ratio of urea and an equimolar of oxalic acid produced PEILs. PEILs were successfully formed by using combinations of hydrochloride salts and complexing agents. HCl acts ... systems. The physical and chemical properties of PEILs are congruent to those of the traditional ILs, but the range of structures for PEILs is likely to be different from that of ILs which are constituted ... non-volatile, and ILs are highly polar, miscible with certain organic solvents and/ or water, and have good solubility with organic and inorganic materials. They are also chemically inert, reusable and...

Báo cáo vật lý: "SIMULTANEOUS SPECTROPHOTOMETRIC DETERMINATION OF Pb(II) AND Cd(II) USING ARTIFICIAL NEURAL NETWORKS" potx

... reproducibility characters of the method yield relative standard deviation (RSD) of 0.44% and 0.94% for Pb(II) and Cd(II), respectively. The limit of detection of the method for Pb(II) and Cd(II) was calculated ... standard solution (1000 mg/l) of Pb(II) and Cd(II) was prepared by dissolving 1.1261 g of Pb(NO3)2 (Fluka AG) and 1.0271 g of Cd(NO3)2. 4H2O (Hamburg) in 1000 ml volumetric flasks and ... Azizul Isha1, Nor Azah Yusof1*, Mazura Abdul Malik1 and Hazlina Hamdan2 1Department of Chemistry, Faculty of Science, 2Faculty of Computer Science and Information Technology, Universiti...

Báo cáo vật lý: "Physical and Chemical Characteristics of Citrullus lanatus Var. Colocynthoide Seed Oil" pdf

... used as a source of heat energy for cooking.7 Due to the growth of the importance of oilseeds in the national economy of Sudan, the high demand to look for a new source of oil and the sufficient ... 2.1 Seed Characteristics and Composition Seed color was determined visually. One hundred seeds of each type were picked randomly and weighed, dehulled and then, hulls and kernels were weighed ... England) was used for determination of moisture and volatile matter under the condition of the test and the temperature was adjusted at 130 ± 2°C. 2.2 Physiochemical Characteristics of the...

Báo cáo vật lý: "Structural and Dielectric Properties of the Mn-Doped BaO-Nd2O3-4TiO2 System" ppt

... phase of standard BaNd2Ti5O14, ICDD No 33–136. The lattice parameters of the XRD show a = 12.20 Å, b = 22.35 Å and c = 3.84 Å. However, detailed observation shows the presence of extra ... composed of a major phase, BaNd2Ti5O14, with some secondary phases, Nd2Ti2O7 and BaTi4O9. The formation of the secondary phases affects the density, dielectric properties and quality ... capacitance of a porous sample and a dense sample. For the porous sample, the total capacitance comprises the capacitance of the grain and air in the pores. It is well known that the capacitance of...

Báo cáo vật lý: "Volumetric and Thermodynamic Studies of Molecular Interactions in Ternary Liquid Mixtures at 303, 308 and 313K" pptx

... between ketones and alkanols. The subsequent formation of new hydrogen bonds between the proton acceptor oxygen atoms of the group of DMF and the proton of the – OH group of 1-alkanols 17 ... subsequent formation of (new) H-bonds [C=O … H–O] between the proton acceptor oxygen atom (with lone pair of electrons) of the C=O group of DMF and the proton of the OH group of 1-alkanols. The ... concentrations, and this has been interpreted to arise from the presence of strong or weak interactions. The extent of deviation depends upon the nature of the constituents and composition of the mixtures....

Báo cáo vật lý: "MODELLING AND SIMULATION STUDY OF VISIBLE EMISSION TRANSMISSIVITY OF SILICON RELATED TO SINGLE AND MULTILAYER ANTIREFLECTION COATINGS" potx

... of Si, SiO2 and Ge for increasing transmittance of Si as active medium in the far red region of 720–750 nm. This paper reports the design and simulation of the transmissivity of single and ... conclusions: the transmissivity of ~ 720–750 nm emission of silicon is affected significantly by the single and multilayer thin film coatings of Ge, SiO2 and Si/SiO2/air and Si/Ge/Si/SiO2/air ... multilayer coatings; and also reports the results of each design at the central wavelength 720 nm. 2. MODELING AND SIMULATION The knowledge of thickness and refractive index of AR coatings...

Báo cáo hóa học: " Formation and reinforcement of clusters composed of C60 molecules" pptx

... (1) the formation of clusters composed of C60molecules via self-assembly and (2) thereinforcement of the clusters. Firstly, clusters such as fibres and helices composed of C60molecules are ... volume of the supercritical fluidchamber made of aluminium was 11.7 ml. Of the crystalscomposed of C60molecules, 0.2 mg was placed on the sur-face of a silicon plate set at the bottom of the ... reinforce-ment of the clusters.We will be investigating the mechanism of the reinfor-cement of the clusters, that is, the role of oxidised C60molecules (C60On) located at the surface of the clusters,in...

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