Ultrafine and uniform silicon nanowires grown with zeolites
Ultrafine and uniform silicon nanowires grown with zeolites
... Ultrafine and uniform silicon nanowires grown with zeolites C.P. Li a , X.H. Sun a,b , N.B. Wong a,b , C.S. Lee a , S.T. Lee a, * , Boon K. Teo c,1 a Department of Physics and Materials Science, ... in final form 21 August 2002 Abstract Ultrafine and uniform silicon nanowires (SiNWs), with a Si crystalline core of 1–5 nm (average 3 nm) in diameter and a SiO 2 outer la...
Ngày tải lên: 16/03/2014, 15:09
Highly efficient and stable photoluminescence from silicon nanowires coated with sic
... pro- cess, hydrocarbon and hydrogen ions react with silicon oxide to form carbon oxide and silicon car- bide. The carbon oxide gas was pumped out while silicon carbide remained on the silicon nanowire. Fig. ... Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong, People's Republic of China Received 23 June 2000 Abstract A reaction of silico...
Ngày tải lên: 16/03/2014, 15:05
Silicon nanowires grown on si(1 0 0) substrates via thermal reactions with carbon nanoparticles
... pyramidal-shaped defects of 2–7 lm with strongly reduced SiO 2 content with silicon wires of diameter ranging between 30 and 50 nm decorating the pyramid walls. The nucleation of the Si nanowires occurs via ... nanowires with diameter of several tens of nanometers and length of tens of micrometers, exhibit unusual quantum confinement effects and interesting electrical and op...
Ngày tải lên: 16/03/2014, 15:08
Polymer assisted synthesis of aligned amorphous silicon nanowires and their core shell structures with au nanoparticles
... Polymer-assisted synthesis of aligned amorphous silicon nanowires and their core/shell structures with Au nanoparticles Xing-bin Yan a,b , Tao Xu a , Shan Xu a,b , Gang ... SiNWs wrapped with Au nanoparticles was simply fabricated as well. The analytic results of the morphology and microstructure confirmed the orientation and the amorphous nature of the SiNWs, and the ... cryst...
Ngày tải lên: 16/03/2014, 15:06
Silicon carbide nanowires synthesized with phenolic resin and silicon powders
... Silicon carbide nanowires synthesized with phenolic resin and silicon powders Hongsheng Zhao à , Limin Shi, Ziqiang Li, Chunhe Tang Division of New Materials, Institute of Nuclear and New ... moulding, carbonization, and high-temperature sintering process, using silicon powder and phenolic resin as the starting materials. Ordinary SiC nanowires, bamboo-like SiC nanowires,...
Ngày tải lên: 16/03/2014, 15:20
Morphology and growth mechanism study of self assembled silicon nanowires synthesized by thermal evaporation
... indirect band gap of $1.1 eV and a small exciton binding energy ($15 eV). In contrast, silicon nanowires (SiNWs) of a few na- nometers in diameter have shown unusual photo- luminescence and Raman ... vapor-phase silicon atoms and/ or sili- con oxide clusters. When the Ni(Fe)Si 2 droplet reaches supersaturation after dissolving sucient silicon atoms from the gas phase, precipitat...
Ngày tải lên: 16/03/2014, 15:06
Oriented silicon nanowires on silicon substrates from oxide assisted growth and gold catalysts
... Oriented silicon nanowires on silicon substrates from oxide-assisted growth and gold catalysts Yuan Yao a , Fanghua Li b , Shuit-Tong Lee a, * a Center of Super-Diamond and Advanced Films (COSDAF) and ... as -grown SiNWs consist of a crystalline core and an amorphous silicon oxide sheath, similar to the SiNWs grown by the OAG method without Au catalyst. As illustrated in Fi...
Ngày tải lên: 16/03/2014, 15:06
Si nanowires grown from silicon oxide
... using with a Renishaw 2000 micro-Raman system. Fig. 1a shows the typical morphology of as -grown Ž Si nanowires. The nanowires major component in .Ž. the product are extremely long ) 10 mm with uniform ... 1999 237–242 Si nanowires grown from silicon oxide N. Wang, Y.H. Tang, Y.F. Zhang, C.S. Lee, I. Bello, S.T. Lee ) Center of Super Diamond and AdÕanced Films, Department of...
Ngày tải lên: 16/03/2014, 15:08
Synthesis of large scale sic–sio2 nanowires decorated with amorphous carbon nanoparticles and raman and PL properties
... strong carbon-related bands in Raman spectrum. The enhancement of blue emission band and a new yellow band were observed from SiC–SiO 2 core–shell nanowires decorated with carbon nanoparti- cles and considered ... of the SiC–SiO 2 nanowires decorated with carbon nanoparticles. In XRD pattern, five peaks indexed with (1 1 1), (2 0 0), (2 2 0), (3 1 1), and (2 2 2) are consistent...
Ngày tải lên: 16/03/2014, 15:08
Temperature dependence of morphology and diameter of silicon nanowires synthesized by laser ablation
... between crystal silicon core and outer layer of silicon oxide. When the forming rate of outer layer of silicon oxide exceeded the growth rate of crystal silicon, outer layer of silicon oxide will ... silicon nanowires was also observed, which may be attributed to renucleation of the crystal silicon in growth pro- cess. On the other hand, the diameter of each branch of the oct...
Ngày tải lên: 16/03/2014, 15:09