Báo cáo hóa học: " Magnesium Ferrite (MgFe2O4) Nanostructures Fabricated by Electrospinning" pdf

... 1. Conclusion Nanostructures of MgFe 2 O 4 have been successfully fabri- cated using an electrospinning technique. Polycrystalline MgFe 2 O 4 nanostructures (crystallite size of *15–24 nm) as confirmed by ... [30, 31], as confirmed by XRD and FT-IR analyses as shown in Figs. 6 and 7, respectively. The morphology of the as-spun and calcined MgFe 2 O 4 / PVP composite nanofibers was reveal...

Ngày tải lên: 22/06/2014, 01:20

... shadowing as nucleation sites for nanostructures. The substrate is sha- dowed during deposition, first by the array of nano- spheres and then by the growing nanostructures. By causing the vapor flux ... Ti x Sn 1-x O 2 nanostructures prepared by magnetron sputter deposition Shutian Chen, Zhengcao Li * and Zhengjun Zhang Abstract Regular arrays of Ti x Sn 1-x O 2 nanoflakes were f...

Ngày tải lên: 21/06/2014, 04:20

... particle structures with a long-range order by combination of pre- heating and oxygen RIE techniques. The neck length and neck width of the network pattern fabricated by oxygen RIE of preheated monolayer ... polystyrene spheres by using a gas mixture of CF 4 and low O 2 content and pure argon plasma etching process, respectively. Only elliptical particles were obtained. Wu et al. [20]...

Ngày tải lên: 22/06/2014, 00:20

... changes induced by post-deposition annealing at 100°C to 300°C are studied. Changes in surface morphology and roughness are examined by atomic force microscopy, electrical sheet resistance by two point ... for PTFE (about 2). By the annealing at 300°C, the ratio decreases to 1.7 for both layer thicknesses. The decrease may be due to reorientation of polar C-F groups induced by therm...

Ngày tải lên: 20/06/2014, 22:20

... formation of one- dimensional silver nanostructures. The absorption spectra of all the Ag-SWCNT dispersions reported here have a similar structure, characterized by a significant increase in light ... concentrations employed, a result consistent with simulations of light absorption by continuous one- dimensional nanostructures. The results encourage further research on the use of SWCNT...

Ngày tải lên: 20/06/2014, 22:20

... optical properties, density, and crystalline structure of Au nanostructures prepared by sputtering on glass. Mea- surement of the sheet resistance of gold nanostructures at room and low (LN 2 ) temperatures ... scan. Direct measurement of the layer thickness was accom- plished by a SEM (JSM-7500F). The specimen for SEM examination was prepared by cross-sectioning of the metal-glass...

Ngày tải lên: 21/06/2014, 06:20

... subsequent heat treatments of the as-hydrothermally synthesized nanostructures. Although the phases identified by XDR were altered by the subsequent heat treatment, the initial morphology remained ... the hydrothermal reaction, the solid products remaining in the solution were isolated by centrifugal separation, fol- lowed by washing with de-ionized water and ethanol for three times....

Ngày tải lên: 21/06/2014, 08:20

... device efficiencies, for example by increasing the number of band gaps in multijunction solar cells or by favoring charge separation in the devices. This can be done by using cells based on nanostructured ... induced by the external perturbation are at the origin of the local-field effects (LF) and reflect the spatial anisotropy of the material. In particular for NWs, like other one-dime...

Ngày tải lên: 21/06/2014, 17:20

... negative (< 5%) by flow cytometry; (v) Cell viability > 95% by trypan blue staining and Guava flow cytometer. In addition, karyotypic normality of the cells was also assessed by an independent ... cells were washed by centrifugation at 600 g for 10 minutes at room temperature. The cell pellet was washed 3 times with 50 ml of PBS, and mononuclear cells were collected by Ficoll-...

Ngày tải lên: 18/06/2014, 15:20

... naïve B cells can be activated by the drug CP-870,893, and this CP- 870,893 effect can be increased by the addition of CpG ODN 2006. Naïve B cells, as defined by lack of CD27 expression, appear ... mediated by CD40- CD40L interactions. Nature 1998, 393:480-483. 5. French RR, Chan HT, Tutt AL, Glennie MJ: CD40 antibody evokes a cytotoxic T-cell response that eradicates lymphoma and byp...

Ngày tải lên: 18/06/2014, 15:20