Báo cáo hóa học: " Patterned growth of InGaN/GaN quantum wells on freestanding GaN grating by molecular beam epitaxy" docx

... wells on freestanding GaN grating by molecular beam epitaxy Yongjin Wang * , Fangren Hu, Kazuhiro Hane Abstract We report here the epitaxial growth of InGaN /GaN quantum wells on freestanding GaN gratings ... variety of novel GaN- based devices. In this study, we extend our research on the patterned growth of InGaN /GaN quantum wells (QWs) o...

Ngày tải lên: 21/06/2014, 05:20

... photons absorption by the dye, which excites electrons to the c onduction band and produces holes in the valence band that can take part in oxidation reaction. Then, the holes were driven by the ... The underlying concept of low emission intensity is thereductionofAusurfaceareainAu/Ni/Aumulti- layers that causes lesser amount of tagging on the NW. Consequently, a larger amount of...

Ngày tải lên: 20/06/2014, 22:20

... Relying on the reflection of high energy electron diffraction, AFM, and STM, it is concluded that molecular beam growth of Ge 1-x Sn x heterostructures with the small concentrations of Sn in ... technique of reflection of high energy electron diffraction (RHEED) has been used to monitor the evo- lution of the surface structure during the growth of the solid solution Ge...

Ngày tải lên: 21/06/2014, 06:20

... Combinatorial Growth of Si Nanoribbons. Supporting Information Acknowledgements This research was supported by the Second Stage of Brain Korea 21 project in Division of Humantronics Information Materials, ... here may be helpful to create ver- satile one-dimensional Si nanostructures. Conclusion The bulk of previous studies have reported the growth of one-dimensional Si nanost...

Ngày tải lên: 21/06/2014, 01:20

... (Al 2 O 3 ) substrates by a ZnO target magnetron sputtering. The stoichiometry of the films was checked under different growth conditions by non-RBS spectro- scopy. Prior to the ZnO growth, a gold ultra ... thickness gold are ‘XRD amorphous’. Conclusions In summary, experiments addressing a possible cata- lytic effect of gold on ZnO growth by r.f. magnetron sputtering under U...

Ngày tải lên: 21/06/2014, 02:20

... electrodeposition. a ions reduction on the Au electrode and random nucleation, b and c formation of several nanocrystals and growth in size, d preferred growth of a single crystal along a preferential ... expansion in surface area as more atoms are reduced onto the rough growth front, leading to the transition from heterogeneous nucleation to homogeneous growth process. The gro...

Ngày tải lên: 21/06/2014, 18:20

... carbon materials are known to have a different way of aggregating during reactive pro- cesses, which leads to the formation of various textures. By modification of reaction conditions and design of ... that of the carbon hollow capsules. So, the reaction temperature needs to be increased further for the formation of solid carbon spheres. The details of the process for the forma...

Ngày tải lên: 22/06/2014, 00:20

... incidence angle of high electrons was adopted along the cross-section of the nanorod, it can be concluded that the nanorod grows exactly along the ZnO [0001] direction, and well consistent with ... orientation, crystal, and optical quality of the ZnO nanorod arrays highly depend on the crystal quality of ZnO seed layers, which was con- firmed by the characterizations of field-emis...

Ngày tải lên: 22/06/2014, 01:20

... control and optimisation of the number of phosphonic acid termini on phosphorus-containing dendrimers for the ex-vivo activa- tion of human monocytes. Chemistry 2008, 14:4836-4850. 21. Fruchon ... expan- sion was significantly enhanced by the presence of 3a-G1. Conversely, the addition of 3a-G1 to cultures induces a massive and significant reduction of the expansion of CD4 +...

Ngày tải lên: 18/06/2014, 15:20

... axis function, brain-derived neu- rotrophic factor concentration or serotonin concentration in persons with MS, this provides a possible explanation for the decreased incidence of depression observed ... depression in persons with MS. Due to the cross-sectional nature of this study we cannot provide definitive conclusions on the direction of causal- ity between activity levels and fat...

Ngày tải lên: 18/06/2014, 19:20