Báo cáo hóa học: " Preparation of Pectin–ZnO Nanocomposite" pdf

... spectrum. The asymmetry of the peak was caused by light scattering due to the insolubility of nano- scale pectin–ZnO particles in water [18]. A typical TEM image of the pectin–ZnO composite is shown ... 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 pecti...

Ngày tải lên: 22/06/2014, 01:20

... 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 of strong hydrophobic ... Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, National Key Laboratory of Micro/Nano Fabrication Technology, Research Institute of Micro/...

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 ... nm Figure 9 Nc-AFM micrograph and image of [Mn III 6 Cr III ](ClO 4 ) 3 on mica.(a) Nc-AFM-micrograph of [Mn III 6 Cr III ](ClO 4 ) 3 on mica. (b) Histogram of height of the nc-AFM im...

Ngày tải lên: 21/06/2014, 01:20

... density of the amino groups and the thick- ness of coating were controlled by tuning the ratio of TEOS to APTES. It was demonstrated when the ratio of TEOS to APTES was 1:4, a layer of uniform ... Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China Full list o...

Ngày tải lên: 21/06/2014, 02:20

... 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 ... Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, People’s Republic of China e-mail: zld@henu.edu.cn S. Dai Á H. Sakai (&) Á M. Abe Dep...

Ngày tải lên: 21/06/2014, 08:20

... [TNTs]. The preparation of TNTs by a hydrothermal treatment of TiO 2 powder in a 10-M NaOH aqueous solution has been reported [8-9]. The use of oxide semiconductors in the form of nanorods, ... 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 photoelectrical per...

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 ... micrographs of the aligned core–shell nanofibers suspended over the U-shaped frame Fig. 3 a Low-magnification and b high-magnification SEM images of aligned SiOx nanotubes. c...

Ngày tải lên: 22/06/2014, 00:20

... 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 require irradiations of higher laser ... by the repulsive force of nanoparticle charges but by the steric hinderance of dispersing agent of PVP. PVP concentrations less than two times concentrations of the sum of...

Ngày tải lên: 22/06/2014, 00:20

... the absence of an external magnetic field. The bulk phase Mo ¨ ssbauer spectrum of Fe 3 O 4 is composed of two sets of magnetic sextets at room temperature [26]. The spectrum of our sample is composed of ... in the presence of polymer PEG 4000 by thermal decomposition of iron acetylacetonate. The morphology of product can be tuned by the amount of PEG 4000. When the concent...

Ngày tải lên: 22/06/2014, 00:20

... section begins with a succession of lemmas that are needed to complete the proofs of Theorems 1.1 and 1.2. It ends w ith the proofs of Theorems 1.1 and 1.2.Aproof of Theorem 1.1, for compact orientable ... bijection from the set of root classes of h 0 with nonzero multiplicity onto the set of those of h 1 . Corollary 3.24. Let α be a Nielsen root class at y 0 of a proper map...

Ngày tải lên: 23/06/2014, 00:20