Báo cáo hóa học: " Synthesis of Tapered CdS Nanobelts and CdSe Nanowires with Good Optical Property by Hydrogen-Assisted Thermal Evaporation" docx
Báo cáo hóa học: " Synthesis of Tapered CdS Nanobelts and CdSe Nanowires with Good Optical Property by Hydrogen-Assisted Thermal Evaporation" docx
... CdS nanobelts and CdSe nanowires, respectivelyNanoscale Res Lett (2009) 4:1166–1170 1169123NANO EXPRESS Synthesis of Tapered CdS Nanobelts and CdSe Nanowires with Good Optical Property by Hydrogen-Assisted ... The tapered CdS nanobelts and CdSe nanowires with high-quality optical property should be good buildingblocks for photonic devices.ConclusionsIn summary, tapered CdS nanobelts and CdSe nanowires were ... The optical properties of tapered CdS nanobelts and CdSe nanowires were studied by PL at room temperature.Figure 4a, b shows the PL spectra of CdS nanobelts and CdSe nanowires, recorded with...
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Báo cáo hóa học: "Synthesis of Efficiently Green Luminescent CdSe/ZnS Nanocrystals Via Microfluidic Reaction" docx
... 7000.40.60.81.01.21.4030060090012001500).u.a(ytisnetnI.LP).u.a(ytisnetnI.sbAWavelength (nm)QY 70%QY 22% CdSe/ ZnS CdSe Fig. 7 Absorption and PL spectra for bare CdSe NCs and corre-sponding CdSe/ ZnS NCs prepared at 120 °C for 10 sNanoscale Res ... (from 516 to 535 nm) with fairly narrow FWHM of PL (29–36 nm). The overcoating of CdSe NCs with ZnS usually results in small red shift of PL peak. To achieve CdSe/ ZnS NCs with pure greenluminescence, ... showed the XRDspectra of CdSe NCs and the overcoated counterpart pre-pared at 120 °C under the residence time of 10 s.Compared with the bare CdSe NCs, the diffraction peaks of the overcoated sample...
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Báo cáo hóa học: " Synthesis of highly transparent ultrananocrystalline diamond films from a lowpressure, low-temperature focused microwave plasma jet" docx
... compensateforthesluggishkinetics and insufficient density of plasma species duringthe LPLT synthesis. A new and effective way to controlthe crystal size, surface morphology, and growthmechanism of diamond films by regulating ... activity and diamond secondarynucleat ion [10-12]. The normal growth temperature and pressure of UNCD f ilms synthesized by mi crowave Ar-1%CH4plasma witho ut addition of H2were 800°C and above ... (Ar-1%CH4-10%Figure 5 Optical transmittance spectrum and AFM images.(a) Optical transmittance spect rum of the UNCD films grown by the LPLT (30Torr/460°C) MEG process with a thickness of approximately...
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Báo cáo hóa học: " Fabrication of Carbon Nanotube/SiO2 and Carbon Nanotube/ SiO2/Ag Nanoparticles Hybrids by Using Plasma Treatment" pptx
... diameter of ca. 5 nm). Thefurther evidence of the existence of Ag nanoparticles isprovided by EDS (Fig. 3e), which reveals the presence of S and Ag on the surface of SWCNT@SiO2/Ag. Similarly, by ... typical reaction, 0.4 mL of ammonia water(28 wt %), 6 lL of MPTO, and 0.1 mL of TEOS wereorderly added to the reactor containing 10 mL of abso-lute ethanol and 5 mg of plasma-treated SWCNTs ... hybrids.Fig. 3 TEM images with lower (a) and higher magnification (b) and EDS spectrum [inset of (a)] of SiO2-coated SWCNTs bearing thiolgroups (SWCNT@SiO2–SH); TEM images with lower (c), highermagnification...
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Báo cáo hóa học: " Synthesis of Aqueous CdTe/CdS/ZnS Core/shell/shell Quantum Dots by a Chemical Aerosol Flow Method" pot
... synthesizing CdTe /CdS QDs [20].As shown in Fig. 2a, with a flow rate of 1.5 L/min and temperature of 200, 225, and 250°C, CdTe /CdS/ ZnS core/shell/shell QDs with PL peak of 525, 554, and 567 nmwere ... shells on CdTecores. A shell of CdS between CdTe and ZnS can work as atransition shell because the band gap and lattice contact of CdS is just between that of CdTe and ZnS. Using micro-wave irradiation ... Research and Development Program of China (863 program 2007AA021803 and 2009AA03Z302) and theNational Natural Science Foundation of China (NSFC No. 60736001) and Natural Science Foundation of Beijing...
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Báo cáo hóa học: " Synthesis of NaYF4:Yb3+, Er3+ upconversion nanoparticles in normal microemulsions" pdf
... spherical, monodisperse with auniform size of 20 nm, and of cubic phase with good crystallinity. Furthermore, these nanoparticles have good dispersibility in nonpolar organic solvents and exhibit visible ... structure and morphology of NaYF4:20% Yb3+,2%Er3+UCNPs were character ized by XRD and TEM. Theobtained samples were characterized by XRD using aBrucker D8-advance X-ray diffractometer with ... sodium hydroxide (400mg) was dissolved in a mixture of water (20 mL) and ethanol (30 mL), followed by the addition of oleic acid(7.4 mL) and n-hexane (4 mL); this formed a bright yel-low transparent...
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Báo cáo hóa học: " Synthesis of silicalite-poly(furfuryl alcohol) composite membranes for oxygen enrichment from air" docx
... Netherlands) with Cu Ka radiation (25 mA and 40 kV) at a scan rate of 2°/min with a step size of 0.02°. Nitrogen adsorption-desorpti on experiment wasperformedat77KandatroomtemperaturewithaMicrometritics ... consist of well-dispersed particleswithout interfacial incompatibility and defects betweenthe inorganic material and the polymer. Therefore, care-ful selection of a pair of polymer and inorganic ... thedevelopment of synthesis methods of pinhole-free,mechanicall y stable, and inorganic-organic hybrid mem-branes to combine the advantages of both inorganic and organic membranes. Such kind of membrane...
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Báo cáo hóa học: " Synthesis of magnetic nanofibers using femtosecond laser material processing in air" ppt
... c-tion of femtosecond laser pulse repetition rate. Fig ure 6shows XRD pattern of NdFeB magnetic nanofibers gener-ated by femtosecond laser at 26 MHz and a power of 15W. The average nanofibers ... nanofi-bers on the specimen using the same power and wave-length with frequencies of 8, 13, and 26 MHz. Theirradiated sample was characterized using SEM, TEM,EDX, and XRD analysis.Results and ... Some of these nanopar-ticles aggregate and then get deposited on the surface of the specimen [8]. Vapor condensation starts with nucleation, proceeds with growth of supercriticalnucleus and...
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Báo cáo hóa học: "Synthesis of freestanding HfO2 nanostructures" ppt
... formation of nanometer scale crystallites of HfO2.Thesecond method involved a two-step heating process by which macroscopic, freestanding nanosheets of HfO2wereformed as a byproduct during the synthesis ... supported by the Battelle foundation and the Iowa Office of Energy Independence grant #09-IPF-11. The Rigaku X-ray diffractometer and Bruker EDX systems were purchased by Army Research Office DODGrant ... microscopy and chemical analysis. KB and LScarried out the X-ray diffraction measurements and synthesis. TK wrote themanuscript, directed measurements, and performed analysis of the structuraland...
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Báo cáo hóa học: "Synthesis of carbon nanotubes with and without catalyst particles" doc
... integration of CNT into appli-cations and large-scale production processes rema inslimited and is dependant on the understanding of severalfundamental i ssues. Some of these issues are highlighted by the ... structure -property correla-tions. In addition, it highlighted the use of transitionmetals as catalysts for carbon nanotube synthesis. Overthe next years, a massive amount of synthesis r outes and ... developed. Most of these werebased on the use of catalyst particles, including the che-mical vapour deposition (CVD) route. CVD synthesis of CNT is facile and can be set up in laboratories withoutdifficulty....
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