Growth of silicon nanostructures on graphite

... simulation of the growth process, i.e. deposition of silicon atoms onto a surface with built-in defects, and subsequent surface diffusion and aggregation of the adatoms, convincingly reproduces most of ... observa- the step edge. A combination of armchair and tions on the growth of Si nanostructures on HOPG zigzag directions in the 2D -graphite hexagonal as follows. Th...

Ngày tải lên: 16/03/2014, 15:34

... energy such that the growth of silicon nanowires is favoured. However, the init ialization of the nanowire growth requires additional investigations. The chemical composition of the nanowires was ... low-temperature growth of silicon nanowires was accomplished on UV-structurable glass without pre- deposition of any catalyst. These kinds of glasses already contain diffe...

Ngày tải lên: 16/03/2014, 15:17

... the contact area between indium and silicon. This leads to larger droplets compared to those on the silicon oxide surface. The size and distribution of gold and indium droplets on the silicon surface ... about surface energies of silicon and silicon oxide. The conclusion of our experiments is that it is not possible to stabilize small indium droplets for silicon nanowhisk...

Ngày tải lên: 16/03/2014, 15:17

... direction. The late-stage after the creation of islands with the STM, the accumulation of silicon atoms on the tip apex wasgrowth rate was about three times lower than the early-stage growth ... distinguish mechanisms of the early stage and late stage of island growth. At the late stage, the transfer of silicon atoms from the STM tip by re-evaporation of the silicon tha...

Ngày tải lên: 16/03/2014, 15:32

... absorption and the emission of light of silicon nanocrystals can be achieved. We have considered impur ities, boron and phosphorous (codoping), located at different substitutional sites of silicon ... concentrate on the dependence of the doped Si-nw properties on the dopant concentration, we note first that on augmenting the number of atoms in the cell (thus lowering the do...

Ngày tải lên: 16/03/2014, 15:15

... Institute of Technology, Atlanta, Georgia 30332-0245, Center of Super-Diamond and AdVanced Film, Department of Physics and Materials Science, City UniVersity of Hong Kong, Kowloon, Hong Kong ReceiVed: ... structures of the silicon- based nanomaterials. This is an important step toward design and control of nanostructures. The growth mechanisms of these products were briefly...

Ngày tải lên: 16/03/2014, 15:30

... all of silicon compounds, such as silicon sulfide shown in this paper and silicon oxide [17], can assist the formation of SiNWs. It is called the silicon compound-assisted mechanism for SiNWs growth. The ... decomposition of SiS. The discussion of the growth mechanism is displayed below. As the function of silicon oxide in the oxygen- assisted mechanism [15,16], in our...

Ngày tải lên: 16/03/2014, 15:21

... detected on non-chitinous carbon sources such as a-glucans and oligosaccharides containing galactose, and tran- scriptional upregulation of nag1 and nag2 under the respective growth conditions was ... hyphal growth in T. atroviride. Further, sporulation rates were measured on various carbon sources by quantification of the numbers of spores formed on agar plates, but again no s...

Ngày tải lên: 23/03/2014, 05:22

... University of Hong Kong, Hong Kong, People's Republic of China Received 25 September 2000; in ®nal form 9 November 2000 Abstract Growth of silicon nanowires (SiNWs) by thermal evaporation of SiO ... nano-particles. The implication of these results on the growth mechanism of the SiNWs is discussed. Ó 2001 Elsevier Science B.V. All rights reserved. 1. Introduction Synth...

Ngày tải lên: 16/03/2014, 15:05

... the thickness of the ONWs is of the order of several ångström, the observed LDOS is a convolution of the LDOS of the SiNWs and that of the adsorbed PQ aggregates. Therefore, the contribution of the LDOS of ... Letters One-dimensional organic nanostructures: A novel approach based on the selective adsorption of organic molecules on silicon nanowires Eric Salomon * , An...

Ngày tải lên: 16/03/2014, 15:35