Báo cáo hóa học: " Synthesis of Polymer Grafted Magnetite Nanoparticle with the Highest Grafting Density via Controlled Radical Polymerization" docx

... (2009) 4:1090–1102 1095123NANO EXPRESS Synthesis of Polymer Grafted Magnetite Nanoparticle with the Highest Grafting Density via Controlled Radical PolymerizationKothandapani Babu Æ Raghavachari ... surface coating of the polymer chains on the surface of the particles. The thickness of the grafted polymer layer increases with increasing polymerization time for a controlled radical polymerization, ... enabling the facile synthesis of a wide variety of hybrid materials [34, 37]. The synthesis of polystyrene grafted MN nanoparticles,without the addition of sacriﬁcial initiator is reported in the literature...

Báo cáo hóa học: "Synthesis of YVO4:Eu3+/YBO3 Heteronanostructures with Enhanced Photoluminescence Properties" pptx

... 0.308 nm in the periph-eral zones of the particle. The two different types of the lattice fringes correspond well to the {101} planes of YVO4(JCPDS no. 72–0274) and the {101} planes of YBO3(JCPDS ... photoluminescenceenhancement of the heteronanostructures. Figure 6 shows the plot of change of PL intensity of the 5D0–7F2emission at620 with the shell ratio. The change exhibits a parabola-likecurve ... that the core material was YVO4:Eu3?.Likewise, the XRD pattern of the YBO3prepared by the sol–gel method is in good agreement with the standard card of YBO3(JCPDS no. 16-0277). Therefore,...

Báo cáo hóa học: " Performance of Asynchronous MC-CDMA Systems with Maximal Ratio Combining in Frequency-Selective Fading Channels" docx

... Figure 4 shows the dependence of the error ﬂoor valueson the number of users in channels with correlated Ricianand Nakagami paths. The Rician channel model has the sameparameters as the channel ... correlated (even for channels with independentfading paths [2, 10]). This increases the complexity indetermining the pdf of β.Therefore, we will use (18) and the pdf of the combinedpath fading ... system, so the problem now is toﬁnd the pdf of γ, which is the MRC output of the multiplefading paths. To be most general, we will consider the pdf of γ with arbitrarily correlated paths in...

Báo cáo hóa học: " Synthesis of Porous NiO and ZnO Submicro- and Nanoﬁbers from Electrospun Polymer Fiber Templates" pptx

... (Fig. 4b).Furthermore, the atomic ratios of nickel/oxygen in the NiO fibers and zinc/oxygen in the ZnO fibers are near to the theoretical ratio of NiO and ZnO of 1:1. The XRDpatterns of the NiO and ... amount of gas products. The release of these gases from the core of the impregnated fibers to the outside could produce a largenumber of pores in the residual materials [33, 34].Although using the ... [14],respectively. The peak positions of the XRD pattern of the ZnO fibers (Fig. 5b) are in good agreement with those of the hexagonal ZnO with lattice constantsFig. 1 SEM images of the electrospun...

Báo cáo hóa học: " Synthesis of NaYF4:Yb3+, Er3+ upconversion nanoparticles in normal microemulsions" pdf

... important prerequisite for the applications of UCNPs is the availability of small andmonodisperse nanoparticles [1]. Recently, the synthesis of various inorganic nanoparticles in normal microemul-sions ... measurements revealed that the as-prepared nanoparticles were spherical, monodisperse with auniform size of 20 nm, and of cubic phase with good crystallinity. Furthermore, these nanoparticles have gooddispersibility ... indicating the high crystallinity of the syn thesizedmaterial, and the peak positions and intensities fr om the experime ntal XRD pattern match closely with the calcu-lated pattern for cubic phase of...

Báo cáo hóa học: " Synthesis of silicalite-poly(furfuryl alcohol) composite membranes for oxygen enrichment from air" docx

... limita-tion of the polymeric membrane is that at elevated tem-peratures, the performance of the membrane will losebecause of the segmental flexibility [9]. Therefore, the separation membranes with ... confirms the presence of silicalite nanoparticles in the PFA polymer. Thermogravimetric analysis of the silicalite nanocrys-tals, PFA, and silicalite-PFA composite membrane (Fig-ure 3) shows that the ... further 46.4% mass loss is observeddue to the decomposition of the PFA membrane. The mass losses of Sil-PFA composite membranes are muchslower than those of the PFA composite membrane.The...

báo cáo hóa học: " Fabrication of flexible UV nanoimprint mold with fluorinated polymer-coated PET film" docx

... nature of the hot embossing process of the fluorinated polymer, the hot -embossed patterns on the PET films wereslightly smaller than the patterns of the Si master mold. The SEM micrographs of the ... repli-cated onto the fluorinated polymer- coated flexible PETfilm by hot embossing lithography with high fidelity andwithout any defects . Due to the slightly tapered profile of the patterns of the Si ... patterns of the master template were transferred with high fide-lity to the flexible PET film, coated with the fluorinated polymer material, by the hot embossing process.Since the surface energy of...

Báo cáo hóa học: " Synthesis of magnetic nanofibers using femtosecond laser material processing in air" ppt

... generation of nanoparticles. 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 ... Magnetic nanoparticles with diameter in the order of few nanometers were attached to the nanofi-brous structure. Increasing the repetition rate of the femtosecond laser results in increasing the ... rate for the NdFeB nanofibers grown at room temperature. The thickness of the generated fibers layer in all of the fourpieces were the same [23], however, the morphology of the nanostructures would...

Báo cáo hóa học: "Synthesis of freestanding HfO2 nanostructures" ppt

... the intrinsic properties of such films is difficult. Properties of the interface s between the film and other components of the device can obscure the intrinsic properties of the film, and the interfacial ... differ-ent area of the sample stage in the SEM. Regardless of the bundle’ s origin, the image demonstrates just howtransparent, and therefore thin, these sheets can be. T heappearance of the bundle ... configuration.Another interesting feature of the powder XRD pat-tern is the appearance of the background in the spe ctra.It appears as if there are a large number of extremelybroad states that underlie the...

Báo cáo hóa học: "Synthesis of carbon nanotubes with and without catalyst particles" doc

... Co. The outer walls of the CNT alignthemselves with the lattice fringes of the a-alumina nanoplatelet. The middle micrograph is a magnification of the boxed region from the leftmicrograph. The ... section view of a CNT root at the support surface. The (Co) catalyst particle resides in the core of the tube. The fringes at the base of the particle correspond to the (200) lattice fringes of cubic ... Whilst the studies showed a good correl ation between the initialcatalyst size and the CNT outer diameter, after synthesis the catalyst particles are found to lie within the core of the CNT...

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