Báo cáo hóa học: " Room temperature spin diffusion in (110) GaAs/ AlGaAs quantum wells" doc

... Marie 3* Abstract Transient spin grating experiments are used to investigate the electron spin diffusion in intrinsic (110) GaAs /AlGaAs multiple quantum well at room temperature. The measured spin diffusion length ... μm at low spin density. Increasing the carrier density yields both a decrease of the spin relaxation time and the spin diffusion coefficient D s ....

Ngày tải lên: 21/06/2014, 05:20

... growth units for grow- ing ZnO nanostructures along c-axis. Therefore, the main chemical reactions in alkaline zincate solution can simply be represented by the following equations: Zn 2 + +4OH − → ... of 11 aspect ratio, which was acquired by increasing the med- ium volume in the present room temperature ZnO nanorods synthesis method. Conclusions In summary, density and dimension c...

Ngày tải lên: 21/06/2014, 01:20

... T} are single points. This situation arises in applications when a nonlinear reaction-difusion process is going on in a time-dependent region which originates from a point source and shrinks back ... problems in non cylindrical domain with boundary surface which has the same kind of behavior as the interface near extinction time. In many cases this may be a characteristic single point...

Ngày tải lên: 22/06/2014, 22:20

... examined. These findings confirm those of previous studies and indi- cate that when compared with young people, older people exhibit poorer leaning balance [1,2], more difficulty maintaining balance ... performing worse than older men in all tests. Competing interests The authors declare that they have no competing interests. Authors' contributions SL and AT conceived the study, partic...

Ngày tải lên: 19/06/2014, 08:20

... history regarding aggravating and relieving factors and the provocative tests like grasping in elbow extension, resisted wrist and long finger exten- sion and resisted forearm supination [1]. ... collection, Coordination and drafting the manuscript All authors read and approved the final manuscript. Competing interests The authors declare that they have no competing interests. Received: ......

Ngày tải lên: 20/06/2014, 04:20

... asymmetry, red shift, and FWHM in Raman line-shape increase by the increasing excitation laser power density. Changes in the Raman line-shape are reversible in nature on decreasing the laser power density. This ... of phonons in the Si NSs. Many others [3, 4] have explained the asymmetry and downshift in the Raman line-shape in terms of a com- bined effect of quantum confinement...

Ngày tải lên: 21/06/2014, 22:20

... selected when a switching indeed happens at this point, each switching frame in our method is generated in the intra-coding manner. As a result, each switching frame generated in our method ser ves ... switching, the reconstructed frame at each switching point need undergo through some extra pro- cessing. For instance, such processing is performed in the DCT domain in [7–10, 12–15]....

Ngày tải lên: 22/06/2014, 23:20

... WK, Wang CJ, Lin WL, Tseng TH: Apigenin inhibits HGF- promoted invasive growth and metastasis involving blocking PI3K/Akt pathway and beta 4 integrin function in MDA-MB-231 breast cancer cells. ... tis- sue sections incubated with Tris-buffered saline (TBS) instead of the primary antibody. The immunoreactivity was then visualized by incubating the samples in 3,3’-dia- minobenzedine. Final...

Ngày tải lên: 18/06/2014, 16:20

... virus infection. Therefore, we used virus-cell infection with replication competent HIV to gain insights into virus- cell fusion. We find that the TAS is an intermediate in the process culminating ... maintained using the Eppendorf Centrifuge 5810 R. Using this system, we manipulated temperature conditions during virus-cell incubation and used fusion inhibitors to explore kinetic factors...

Ngày tải lên: 20/06/2014, 01:20

... 7 Another feature in this CuO nanostructure was the interlaced nanodisc morphol ogies, namely the vertical ly interconnected structure with standing nanodiscs in the center part of the lying nanodiscs ... Low magnification TEM and HRTEM images of an individual interlaced nanodisc, respectively. Inset in (c) shows a schematic illustration emphasizing the interlaced disc structure. Seo et...

Ngày tải lên: 21/06/2014, 03:20