Báo cáo hóa học: " Synthesis and Magnetic Properties of Maghemite (c-Fe2O3) Short-Nanotubes" ppt

... rational synthesis of maghemite (c-Fe 2 O 3 ) short-nanotubes (SNTs) by a convenient hydro- thermal method and subsequent annealing process. The structure, shape, and magnetic properties of the ... physical and chemical properties based on their high intrinsic anisotropy and surface activity [4, 5]. Especially, understanding the correlation between the magnetic proper...

Ngày tải lên: 21/06/2014, 17:20

... magnetic properties. Magnetization curves as a function of applied magnetic field (M-H)at RT of samples are revealed in Figure 6, where the con- tributions of the paramagnetism (PM) signals of ... measurements and data analysis, and drafted the manuscript. DG and DX made the conception and design of the manuscript. ZZ2 carried out the XPS measurements and data analysi...

Ngày tải lên: 20/06/2014, 22:20

... Li (&) Institute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, 730000 Lanzhou, People’s Republic of China e-mail: wtao@lzu.edu.cn F ... Hysteresis loop of the as-synthesized CoFe 2 O 4 nanoparticles measured at a 300 K, b 10 K Table 1 Comparison of magnetic properties of the as-synthesized cob...

Ngày tải lên: 21/06/2014, 18:20

... Template synthesis of an array of nickel nanotubules and its magnetic behavior. Adv Mater 2001, 13:1631-1633. 18. Li DD, Thompson RS, Bergmann G, Lu JG: Template-based synthesis and magnetic properties ... nanotubes [9], and so on. The growth and magnetic properties of magnetic nanomaterials in AlN, MgO, polymer tem- plates, and superlattice matrices w ere also...

Ngày tải lên: 21/06/2014, 04:20

... analysis, and drafted the manuscript. LS and PB conceived of the study. HA, ES, LA, and LS participated in the analysis and in the production of a final version of the manuscript. All authors read and ... carriers. Abbreviations AFM: anti-ferromagnetic; FM: ferromagnetic; GGA-PBE: generalized gradient approximation and the Perdew, Burke, and Ernzerhof; NM: non -magnetic;...

Ngày tải lên: 21/06/2014, 05:20

... 120, and 180 min, respectively Fig. 7 a The decomposition of the PL spectrum of the SiNWs treated with HF and the PL intensity varieties of the elementary bands with b H 2 O 2 concentrations and ... the optical properties of the porous SiNWs. Figure 6a and b display the PL spectrums of the porous SiNWs with different H 2 O 2 concentrations and etching Fig. 2 SEM and TE...

Ngày tải lên: 21/06/2014, 08:20

... Foundation of China (Grant Nos. 60778040, 10804036, 60878039), the Science and Technology Bureau of Key Program for Ministry of Education (Item No. 207025), and the Development of the Science and Technology ... surfaces. Conclusions WSe 2 nanorods of 10–50 nm in diameters and 100–400 nm in lengths were prepared successfully by solid-state reac- tion of the tungsten and s...

Ngày tải lên: 22/06/2014, 01:20

... results of XRD and TEM, the FTIR and FT-Raman spectra of the HAp show the absorption bands characteristic of hydroxyapatite. XPS results provide the additional evidence for the successful doping of ... Constantin 3 and Daniela Predoi 1* Abstract Synthesis of nanosized particle of Ag-doped hydroxyapatite with anti bacterial properties is in the great interest in the devel...

Ngày tải lên: 20/06/2014, 23:20

... the growth angle effect of the films for optical properties. The thickness of the ZnO thin films was c heck ed by FE- SEM and was fixed at 100 nm. Three growth angles (0°, 15°, and 30°) of the columnar ... cross- section view of the 0° growth-angle d columnar ZnO film. Columnar ZnO f ilms with angles of 15° and 30° are shown in Figure 2b-1, c-1. To get a magnified view of t...

Ngày tải lên: 21/06/2014, 17:20

... method of functionalizing QDs is simple and can avoid complicated synthesis and characterization of the intermediate products of QDs, when reactions are performed on the QD surfaces. A number of ... prepared, and few microlitres (10–50 lL) of these solutions were added to the different sets of 3 mL solution of CdTe QDs. In a typical synthesis of CdTe–Dendrimer conjug...

Ngày tải lên: 21/06/2014, 20:20