Báo cáo hóa học: "Synthesis of YVO4:Eu3+/YBO3 Heteronanostructures with Enhanced Photoluminescence Properties" pptx

... phosphors with core/shell heterostructures. The YBO 3 shell ratio is a critical factor in photoluminescence enhancement of the heteronanostructures. Figure 6 shows the plot of change of PL intensity of ... image of a single particle of the heteronanostructures (SR = 1/2). Interest- ingly, two lattice fringes of different spacing appear in a single nanoparticle. The lattic...

Ngày tải lên: 21/06/2014, 20:20

... [41]. Surface-Initiated polymerization without the use of sacri- ficial initiator could offer certain advantages such as the elimination of the step associated with the removal of unattached polymer that ... down quickly, in chloroform. It can also be seen from the Fig. 7c that the addition of 35 mg of P(BnMA) of M n = 17,000 to 15 mg of MNs does not result in the for- mation...

Ngày tải lên: 21/06/2014, 20:20

... spectrum (Figure 5) was obtained after ultraso- nic dispersion of a 1 wt.% solution of the products in n- hexane, compared with the spectrum of nanoparticles before annealing, its green emission plays ... pattern match closely with the calcu- lated pattern for cubic phase of NaYF 4 (JCPDS card, No. 77-2042). From the line broadening of the diffraction peaks, the crystallite size...

Ngày tải lên: 20/06/2014, 22:20

... Netherlands) with Cu Ka radiation (25 mA and 40 kV) at a scan rate of 2°/min with a step size of 0.02°. Nitrogen adsorption-desorpti on experiment was performedat77Kandatroomtemperaturewitha Micrometritics ... selection of a pair of polymer and inorganic material * Correspondence: huanting.wang@monash.edu 1 Department of Chemical Engineering, Monash University, Clayton, Victoria...

Ngày tải lên: 20/06/2014, 23:20

... rapid onset of self-assembly of the nanoparticle chains (or nanofibers). The laser pulse repetition rate plays a critical role in the formation of nanofibrous like structure. Figure 2 shows SEM images of ... below the Curie temperature of the sample to form magnetic nanofibers. The total magnetization of a nanofiber is given b y the vectorial sum of all single magnetic moments...

Ngày tải lên: 21/06/2014, 03:20

... sides of HfO 2 nanosheets. (a) Wide view image of a curled sheet with a portion broken off. Bright and dark sides are both visible. (b) Close- up of the bright side. The surface has a lot of texture ... macroscopic HfO 2 . With regards to nanostructure synthesis, the creation of two-dimensional freestanding nanostructures is of spe- cial interest. Most device applications enta...

Ngày tải lên: 21/06/2014, 04:20

... tube. The fringes at the base of the particle correspond to the (200) lattice fringes of cubic Co. The outer walls of the CNT align themselves with the lattice fringes of the a-alumina nanoplatelet. ... magnification of the boxed region from the left micrograph. The right micrograph is a copy of the middle image with lines added to highlight the alignment of the graphitic pl...

Ngày tải lên: 21/06/2014, 04:20

... Structural studies of both types of NWs performed with electron microscopies reveal a marked difference between the roughnesses of their respective sidewalls. As the investigation of their length ... of one of the {112} sidewalls. Although the facets are rather rounded, probably due to the oxide layer that covered the sidewall, a corrugation of up to 2 nm is found when the hei...

Ngày tải lên: 21/06/2014, 05:20

... cm -1 for Si-CH 2 stretching [20]. The azidation of the POSS mole- cule was also confirmed by comparison of the IR spec- trum of pure POSS with that of POSS (POSS-N 3 )with azide-functionality. A new peak ... reaction of POSS with sodium azide in the presence of ammonium chloride. The suc- cess of click cycloaddition is supported by evidence from FT-IR, Raman, XPS, TEM, ED...

Ngày tải lên: 21/06/2014, 05:20

... growth of the NWs was achieved from the sublimation of Si or Ge at a deposition pressure of 10 -9 mbar. In order to grow th e NWs, the Si(111) sur- face was heated either at 550°C for the growth of ... cleaved with micromanipulators in the chamber equipped with a focus ion beam machine and transfer into holey grids covered with a very thin carbon layer. Results and discussion Ti...

Ngày tải lên: 21/06/2014, 07:20