Nearly monodisperse cu2o and cuo nanospheres
báo cáo hóa học:" Synthesis and Magnetic Properties of Nearly Monodisperse CoFe2O4 Nanoparticles Through a Simple " docx
... synthesize nearly monodispersed CoFe2O4 nanoparticles and systematically investigate the magnetic properties of the as-prepared nanomaterials At room temperature, these asprepared nanoparticles ... was transferred into a Teflon-lined stainless autoclave with a capacity of 150 ml In order to crystallize the particles, the reaction temperature of the autoclave was increased and maintained at ... loop of the as-synthesized CoFe2O4 nanoparticles measured at a 300 K, b 10 K prepared in this work have a higher saturation magnetization value compared with the reported samples with superparamagnetic...
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synthesis, characterization and growing mechanism of monodisperse fe3o4 microspheres
... condition of the microspheres shown in Fig 1c The surface of microspheres was made of a number of small subunits, each of which is like a tetrahedron crystal in shape and uniform in size and packed ... formation of homogeneous and tight Fe3O4 In contrast, pH values in NaOH system changed all through and decreased with the nucleation time of forming Fe3O4, and further resulted in the formation of Fe3O4 ... morphologies of subunits and Fe3O4 microspheres formed by the subunits On the other hand, the reaction time was also an important factor that determined the dispersion of Fe3O4 microspheres and the...
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hollow, porous, and yttrium functionalized zno nanospheres with enhanced
... ZnO nanospheres taken at (a) low and (b) high magnification (c) and (d) Magnified SEM images of an open hollow and porous ZnO nanosphere SEM images of the Y-doped nanospheres taken at (e) low and ... of the ZnO nanospheres prepared under different concentrations of monoethanolamine (MEA): (a) and (b) mL, (c) and (d) mL, (e) and (f) 15 mL, (g) and (h) 30 mL, (i) and (j) 40 mL, (k) and (l) ... (Fig 5(g) and (h)), and the numerous nanorods with pores on surfaces are assembled to nanospheres (Fig 5(h)) due to the dissolution and recrystallization (Fig 5(i)) The hollow and porous nanospheres...
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Báo cáo toán học: " Synthesis and characterization of CuO nanowires by a simple wet chemical method" pdf
... Synthesis and characterization of CuO nanowires by a simple wet chemical method Anita Sagadevan Ethiraj1 and Dae Joon Kang*1 BK21 Physics Research Division, Department of Energy Science, ... djkang@skku.edu Abstract We report a successful synthesis of copper oxide nanowires with an average diameter of 90 nm and lengths of several micrometers by using a simple and inexpensive wet chemical ... In order to understand the chemical and structural nature of the synthesized CuO and the effect of the chemicals used in the synthesis of CuO nanowires, FTIR analysis was carried out Figure represents...
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Báo cáo hóa học: " Enhancements of thermal conductivities with Cu, CuO, and carbon nanotube nanofluids and application of MWNT/water nanofluid on a water chiller syste" docx
... Enhancements of thermal conductivities with Cu, CuO, and carbon nanotube nanofluids and application of MWNT /water nanofluid on a water chiller system Nanoscale Research Letters 2011 6:297 Submit your manuscript ... factors on thermal conductivity and stability of CNT /water nanofluids, including nanoparticle size and concentration, surfactant type and concentration, pH, temperature, power of ultrasonication and ... the comparison of cooling capacity rate between water base fluid and MWNT /water nanofluid, one can see that the cooling capacity of MWNT /water nanofluid is higher than that of water base fluid...
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Báo cáo hóa học: " Preparation and thermal conductivity of CuO nanofluid via a wet chemical method" potx
... fraction at 25°C The thermal conductivity of the base fluid (H2O) was measured, and it had an average value of 0.580 W·m -1 ·K -1 It can be seen that the thermal conductivity ratio increases as ... al.’s data, Das et al.’s data, and Liu et al.’s data [30-32], suggesting the potential application as heat transfer fluids 12 13 14 Conclusion A wet chemical method to synthesize stable CuO nanofluids ... thermal conductivity ratio of the typical sample, defined as k/k0, where k and k0 are the thermal conductivities of the nanofluids and the base media (H2O) respectively, as a function of the particle...
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Báo cáo hóa học: " Large-scale fabrication of ordered arrays of microcontainers and the restraint effect on growth of CuO nanowires" ppt
... exist CuO nanowires on the outside surface of microcontainers in our case However, we not observe any CuO nanowires on the outer surface of microcontainers We believe that the growth of CuO nanowires ... compact The CuO film can only expand along normal direction of the surface Due to space limit, CuO film on the inner surface of microcontainer will become concentrated as expansion, while the Figure ... http://www.nanoscalereslett.com/content/6/1/86 Page of design of the study and discussion of growth mechanism of CuO nanowires NX participated in the design of the study, and critically revised the manuscript...
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báo cáo hóa học:" Synthesis and characterization of CuO nanowires by a simple wet chemical method" doc
... Synthesis and characterization of CuO nanowires by a simple wet chemical method Anita Sagadevan Ethiraj1 and Dae Joon Kang*1 BK21 Physics Research Division, Department of Energy Science, ... djkang@skku.edu Abstract We report a successful synthesis of copper oxide nanowires with an average diameter of 90 nm and lengths of several micrometers by using a simple and inexpensive wet chemical ... In order to understand the chemical and structural nature of the synthesized CuO and the effect of the chemicals used in the synthesis of CuO nanowires, FTIR analysis was carried out Figure represents...
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báo cáo hóa học:" Fabrication, characterization, and kinetic study of vertical single-crystalline CuO nanowires on Si substrates" doc
... Fabrication, characterization, and kinetic study of vertical single-crystalline CuO nanowires on Si substrates Shao-Liang Cheng*1 and Ming-Feng Chen1 Department of Chemical and Materials ... report here on the first study of the growth kinetics of high-yield, vertical CuO nanowires on silicon substrates produced by the process of thermal oxidation The length of the CuO nanowires could ... oxidation conditions have not been extensively explored Since the growth kinetic data can provide crucial information leading to an understanding of the formation process of CuO nanowires, it is of both...
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Báo cáo hóa học: "Nearly Monodispersion CoSm Alloy Nanoparticles Formed by an In-situ Rapid Cooling and Passivating Microfluidic Process" docx
... both the nanoparticle growth and the soon coming OR and OA processes can be suppressed, and the surfaces of NPs will be rapidly deactivated by acetone through a process of 123 1132 Nanoscale Res ... mixing and reaction area from the inlets of and to Y mixers connected with channels shrinking from in order to realize a rapid mixing with low pressure loss The nucleation and growth area has channel ... quenching and collecting process at room temperature and without deactivating the nanoparticle surface As expected, the formed NPs showed a broader dispersion with SD% greater than 15% On the other hand,...
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Báo cáo hóa học: " Nanospheres: Preparation, Characterization, and Their Adsorption Properties" docx
... Bovine, and Lysozyme Experimental Sodium tungstate, sodium borohydride, hydrochloric acid (37%), and ethanol were purchased from Sinopharm Chemical Reagent Co., Ltd (Shanghai, China) and used ... temperature was 100 °C and that the NaBH4 powders must be added step-by-step because the reaction at 100 °C takes place vigorously Coomassie Brilliant Blue and the proteins adsorption experiments ... suspension and incubated on the shaker UV–vis absorption spectra of Coomassie Brilliant blue and proteins in the supernatant were recorded at different time intervals to follow the adsorption...
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Báo cáo hóa học: " Microwave-Assisted Synthesis of Titania Nanocubes, Nanospheres and Nanorods for Photocatalytic Dye Degradation" pptx
... spectra of titania nanostructures S1, S2, and S3 The onset of absorption for the three samples is 382, 405, and 415 nm for S1, S2, and S3, respectively To determine the nature of the band gap, ... NaCl (5.0 M), and NH4Cl (5.0 M) were employed for the synthesis A typical microwave oven (Whirlpool, 1200W) operating at a frequency of 2,450 MHz was used for the synthesis Synthesis of TiO2 Nanostructures ... the band gap is attributed to the indirect transition The band gap energy of nanocubes (S1) is significantly higher as compared to that of nanospheres (S2, 3.17 eV) and nanorods (S3, 3.15 eV) For...
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Báo cáo hóa học: " Fabrication of Worm-Like Nanorods and Ultrafine Nanospheres of Silver Via Solid-State Photochemical Decomposition" pot
... coefficients of (a) Ag nanorods synthesized using 1:5 ratio of Ag2C2O4 and CTAB, and (b) and (c) nanospheres synthesized using 1:5 ratio of Ag2C2O4 and PVP and 1:2 ratio of Ag2C2O4 and CTAB, respectively, ... crystallite sizes of (a) Ag nanorods synthesized using 1:5 ratio of Ag2C2O4 and CTAB and (b) and (c) nanospheres synthesized using 1:2 ratio of Ag2C2O4 and CTAB and 1:5 ratio of Ag2C2O4 and PVP, respectively, ... patterns of (a) Ag nanorods synthesized using 1:5 ratio of Ag2C2O4 and CTAB and (b) and (c) nanospheres synthesized using 1:5 ratio of Ag2C2O4 and PVP and 1:2 ratio of Ag2C2O4 and CTAB, respectively...
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Báo cáo hóa học: " Research Article Quasi-Nearly Subharmonicity and Separately Quasi-Nearly Subharmonic Functions" pot
... function is K -quasi-nearly subharmonic if and only if it is K -quasi-nearly subharmonic n.s iii A Lebesgue measurable function is 1 -quasi-nearly subharmonic if and only if it is 1 -quasi-nearly subharmonic ... subharmonic n.s and if and only if it is nearly subharmonic in the sense defined above iv If u : D → −∞, ∞ is K1 -quasi-nearly subharmonic and v : D → −∞, ∞ is K2 -quasi-nearly subharmonic, then ... sup{K1 , K2 } -quasi-nearly subharmonic in D Especially, u : sup{u, 0} is K1 -quasi-nearly subharmonic in D v Let F be a family of K -quasi-nearly subharmonic resp., K -quasi-nearly subharmonic n.s...
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