Báo cáo hóa học: " Preparation of Fe3O4 Spherical Nanoporous Particles Facilitated by Polyethylene Glycol 4000" docx

... treatment Nanoscale Res Lett (2009) 4:1439–1446 1441 123 NANO EXPRESS Preparation of Fe 3 O 4 Spherical Nanoporous Particles Facilitated by Polyethylene Glycol 4000 Li-Li Wang Æ Ji-Sen Jiang Received: 20 April ... decomposition of iron acetylacetonate in the presence of polyethylene glycol 4000. The size of the spherical nanoporous particles is 100–200 nm. Su...

Ngày tải lên: 22/06/2014, 00:20

... ratio reached t o 100:1, Au NRs deposited on gra- phene sheets by means of layer -by- layer, which lead to illegibility of the edges of graphene sheets. As the results shown in Figure 3C, 3D, the ... graphenes, EDX spectra of graphene oxide (GO), and graphene. In the course of graphene preparation, PVP was used and remarkably increased the stability of graphene sheets because...

Ngày tải lên: 20/06/2014, 22:20

... NANO EXPRESS Open Access Preparation of monolayers of [Mn III 6 Cr III ] 3+ single- molecule magnets on HOPG, mica and silicon surfaces and characterization by means of non- contact AFM Aaron ... layers. This differ- ence can be explained by a neutralization of charge of [Mn III 6 Cr III ] 3+ caused by the mirror-charge effect in the first layer but by anions in the other...

Ngày tải lên: 21/06/2014, 01:20

... content of anatase decreased and the content of rutile increased in the range of 1–5 M HCl solutions. A maximum of content of rutile can be obtained in the 5 M HCl solutions. Then the content of anatase ... supported by the National Natural Science Foundation of China (Grant No. 20903034, 10874040) and the Cultivation Fund of the Key Scientific and Technical Innovation Projec...

Ngày tải lên: 21/06/2014, 08:20

... characterization of TiO 2 film Figure 1a shows the XRD pattern of the sol-gel TiO 2 nanoparticles at 450°C, which indicates a mixture of the anatase and rutile phases. The XRD pattern of TiO 2 nanoparticles ... of dye adsorption on TiO 2 in the form of nanorods and nanotubes is expected because of the high surface area of these nanostructures. It is expected that the p...

Ngày tải lên: 21/06/2014, 17:20

... inner diameter of the nanotubes can also be tuned by control of the diameter of template fiber by simply adjusting the physical properties of polymer solution, this usually be- geted changes of the solution ... the thickness of the coated layers was uniform and had a wide varying range. Therefore, the outer diameter of the tubes is governed by the thickness of the tube wa...

Ngày tải lên: 22/06/2014, 00:20

... Fe–Pt nanoparticles were found to be composed of disordered FCC A1 phase with average diameters of 0.5–3 nm regardless of the preparation conditions. Higher iron compositions of nano- particles ... of Au nanoparticles is dominated mainly by the steric hinderance of PVP dis- persant as described in the section ‘‘Fe–Pt nanoparticles’’. Conclusion Fe–Pt and Au nanoparticles wer...

Ngày tải lên: 22/06/2014, 00:20

... peak of ZnO, originating from stretching mode of the Zn–O bond [14]. The remaining peaks in pectin– ZnO composite are induced by pectin, which is confirmed by comparing of the IR spectrum of the ... 3 UV–Vis absorbance spectrum of the pectin–ZnO composite Fig. 4 TEM image of the composite of pectin-wrapped ZnO nanoparticles. The inset is a magnified TEM image of a pectin– Zn...

Ngày tải lên: 22/06/2014, 01:20

... end of each gait cycle. Each subject performed two trials of overground walking (OG) for a distance of 10m. Then each subject performed two trials of treadmill walking (TM) for a duration of ... 3 - Goodness of fit Goodness of fit of the models with respect to the validation data. - 2 - Abstract Background Locomotor control is accomplished by a complex integration o...

Ngày tải lên: 19/06/2014, 08:20

... the performance of wearable pulse oximeters by reducing the influence of The error distributions of SpO2, obtained by the SPWVD approach, when subjects performed different types of motions: hor-izontal ... with different kinds of motions: horizontal and vertical movements of the hand, as well as bending and pressing motions of the finger. It can be seen that the estimation...

Ngày tải lên: 19/06/2014, 10:20