Deposition of carbon nanotubes on si nanowires by chemical vapor deposition

... Deposition of carbon nanotubes on Si nanowires by chemical vapor deposition Y.F. Zhang, Y.H. Tang, Y. Zhang, C.S. Lee, I. Bello, S.T. Lee * Center of Super-Diamond & Advanced ... Department of Physics & Mater. Sci., City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China Received 19 July 2000 Abstract By using a hot ®lament chemical...

Ngày tải lên: 16/03/2014, 15:04

... Summary In conclusion, by chemical vapor deposition of silane, the large-scale SiNWs were grown under the catalysis of Fe particles at the lower temperature – 450 °C. These nanowires have a diameter of ... images of silicon nanostructures growth by different pyrolysis time of silane. (a) a triangle-shaped silicon tip grown on a CNT by 30-min pyrolysis time. (b) A rect...

Ngày tải lên: 16/03/2014, 15:06

... Physica E 37 (2007) 153–157 Dimensional evolution of silicon nanowires synthesized by Au Si island-catalyzed chemical vapor deposition D.W. Kwak, H.Y. Cho, W C. Yang à Department of Physics ... 81.15.Gh Keywords: Si nanowires (Si- NWs); Au Si alloy droplets; VLS; Chemical vapor deposition; Diffusion kinetics; Morphological evolution 1. Introduction The ongoing reducti...

Ngày tải lên: 16/03/2014, 15:15

... the front side of SiO 2 NWs, while no Fe NPs were found on the back side of SiO 2 NWs. 4. Conclusion Fe NPs dispersed on the surface of SiO 2 NWs can be prepared simply by heating silicon wafer ... furnace by the following reaction, SiOðgÞ→ Si : ðsÞþSiO 2 ðsÞð2Þ As a result, Si/ SiO 2 nanowires appear, and further oxidation of nanowires could lead to the formation of...

Ngày tải lên: 16/03/2014, 15:10

... arrays of silicon nanowires (SiNWs) have been synthesized by a chemical vapor deposition (CVD) template method without catalyst. The micro-structures of the SiNWs were studied by high-resolution transmission electron ... in amorphous and transition alumina and these sites have the intrinsic catalytic activity of transition alumina in front of the decomposition of silane...

Ngày tải lên: 16/03/2014, 15:08

... of silicon nanowires (SiNWs) obtained by the chemical vapor deposition method with a copper-catalyzed vapor liquid–solid mechanism. The nanowires have a typical diameter of 200 nm. Spectrum of ... thin films [8–10]. Simulation of the emission spectrum of an ehp by a convolu- tion product of the density of states of the carriers affected by the Fermi–Dirac distr...

Ngày tải lên: 16/03/2014, 15:19

... 1 Chapter 2 Synthesis and Purification of Multi- Walled and Single-Walled Carbon Nanotubes M.Yumura 2 Chapter 3 Electron Diffraction and Microscopy of Carbon Nanotubes S. Amelinckx, ... a long time that carbon 5 fibre is synthesized by catalytic decomposition of hydrocarbon [36] in the reactor shown in Fig. 4. Endo et al. reported that MWCNT is contain...

Ngày tải lên: 05/03/2014, 17:20

... deposition of CdS film has been explored by various techniques, such as thermal evaporation [3], sputtering [4], molecular beam epitaxy [5], spray pyrolysis [6], chemical bath deposition [7]. Chemical ... The deposition time is chosen to be 2 h for the bath containing 25 ml of 1M CdSO 4 solution and 9 h for the bath with 3 ml of 1M CdSO 4 solution. 2.2. Characterization...

Ngày tải lên: 14/03/2014, 13:20

... project on carbon emission accounting models but have not yet published a conclusion. • In May 2008 the IASB scope discussion confirmed that the project will co ver all tradeable emission rights ... addressing those areas of concern and can provide insight into some of the key questions that businesses may be asking. To receive electronic copies or additional information ab...

Ngày tải lên: 15/03/2014, 16:20

... rates of silicon island growth on Si( 111) surfaces with the STM werealong the surface [18]. It is important to define the sort of conditions on the surface that are obtained as a function of tunneling ... Results and discussion on the STM tip at the initial stages of the tip– sample interaction very likely occurs in the growth The reproducible formation of the 3D silicon isla...

Ngày tải lên: 16/03/2014, 15:32