Báo cáo hóa học: " Structure and Photoluminescent Properties of ZnO Encapsulated in Mesoporous Silica SBA-15 Fabricated by Two-Solvent Strategy" doc

... calcined at 650 °C exists in form of the crystalline ZnO wurtzite phase. ZnO in the 20 wt% ZnO/ SBA-15 nanocomposite calcined at 500 °C exists in form of the non-crystalline ZnO phase or ZnO clusters. Vepr ˇ ek ... high loadings of ZnO keeps well ordered hexagonal mesoporous structure of SBA-15. ZnO in the ZnO/ SBA-15 nanocom- posite calcined at 500 °C e...

Ngày tải lên: 22/06/2014, 00:20

... estimated from XRD line-broadening (Table 1 and Fig. 2). The corre- sponding SAED patterns, given as insets in Fig. 5, show spotty ring patterns suggesting a polycrystalline structure in all the prepared ... observation of lattice fringes of the rhombohedral structure of LSMO phase in the samples for x = 0.1 and 0.2 from HRTEM (insets in Fig. 5) also confirms the transfor...

Ngày tải lên: 22/06/2014, 00:20

... study and participated in its design and coordination. CY participated in the revision of the manuscript. LPS and YW participated in the preparation of the TiO 2 /ZrO 2 bilayer thin film. JQZ and ... affected by the annealing tem- perature. Normally, for a composite thin film, the dielec- tric constant is mainly dependent on the component of the film and the microstruc...

Ngày tải lên: 20/06/2014, 21:20

... Li [20,21], C [22], Er [23]-doped ZnO. However, until now there is no con- sensusontheoriginofFMindopingZnO,sowe researched the ori gin of RTFM in the doping ZnO materials, it was hoped that we ... observed in In-doped ZnO nanowires, which may be associated with oxygen vacancies induced by In doping [36]. In our system, the pure ZnO NPs show the PM behavior, but all of th...

Ngày tải lên: 20/06/2014, 22:20

... the pH of P-containing solu- tion was adjusted to 10 with NH 3 and stirred continu- ously for 30 min. The P-containing solution was added drop -by- drop into the [Ca + Ag]-containing solution andstirredfor2handthepHwas ... of hydroxyapatite. XPS results provide the additional evidence for the successful doping of Ag + , in Ag:HAp. The inhibition of bacteria containing different co...

Ngày tải lên: 20/06/2014, 23:20

... matrix and thereby may provide a new avenue for nanofabrication. With the increasing deposition time of Co, the size or con- tent of granular Co embedded in the InP template increases, and the m agnetic ... Basic Research Project of 08JC1411000, the Research fund for the Doctoral Program of Higher Education of Chain, and the Graduate Innovative Ability Training Special Fund...

Ngày tải lên: 21/06/2014, 04:20

... orbital appearing in the gap region, characterizing a metallic-like behavior for the majo rity sp in and a semiconductor-like behavior for the minority spin. The band structures of the SL for spin up and ... density of states (PDOS) for the Cr-d orbital, (c) Band structure, for spin up and spin down, along the main symmetry lines of the SL BZ. The Fermi level, E F , is set to...

Ngày tải lên: 21/06/2014, 05:20

... with the porosity and takes up the leading place of the PL spectrum, resulting in the ‘‘red-shift’’ observed. These porous SiNWs combine the physical properties of SiNWs and PS and could lead to opportunities ... (&) Department of Materials Science and Engineering, Key Lab of Advanced Materials, Tsinghua University, 100084 Beijing, People’s Republic of China e-mail:...

Ngày tải lên: 21/06/2014, 08:20

... incorporated sulfate ions in the preparing process, corre- sponding to the one band of the v1 mode and two bands of the v3 mode (C 3v symmetry), respectively [24]. The ATR- FTIR spectra of ... (1D) nanostructures are very appealing, owing to many unique physical and chemical properties based on their high intrinsic anisotropy and surface activity [4, 5]. Especially, understand...

Ngày tải lên: 21/06/2014, 17:20

... study introduces optical properties of a columnar structured zinc oxide [ZnO] antireflection coating for solar cells. We obtained ZnO films of columnar structure on glass substrates using a specially ... be increased by around 10%. In general, the refractiv e index of a thin film is variable according to the kind of material and thickness of the films. It is addressed th...

Ngày tải lên: 21/06/2014, 17:20