Si nanowires grown from silicon oxide
Si nanowires grown from silicon oxide
... decompositions of silicon oxide at the rela- tively low temperature of 9308C as shown below. Si O™ Si qSiO x)1 Ž. xxy1 and 2SiO™ SiqSiO . 2 These decompositions result in the precipitation of silicon ... substrate. Si nanoparticles were precipitated and surrounded by shells of silicon oxide. The Si nanowire nucleus consisted of a polycrystalline Si core with a high density...
Ngày tải lên: 16/03/2014, 15:08
![Structures and electronic properties of si nanowires grown along the [1 1 0] direction role of surface reconstruction](https://media.store123doc.com/images/document/14/rc/td/medium_tdu1394959072.jpg)
Structures and electronic properties of si nanowires grown along the [1 1 0] direction role of surface reconstruction
... online 9 August 2008 Keywords: Density functional calculation Surface energy Silicon Nanostructures abstract The atomic and electronic structures of silicon nanowires grown along the [110] direction ... supercell, l Si ( l H )is the chemical potential of an Si (H) atom, n Si (n H ) is the number of Si (H) atoms, and e z is the zero-point energy of Si H vibrations. The value o...
Ngày tải lên: 16/03/2014, 15:37
Formation of silicon oxide nanowires directly from au si and pd–au si substrates
... images of SiO x nanowires grown on Au /Si and Pd–Au /Si substrates, as well as an EDX spectrum of SiO x nanowires grown on the Au /Si substrate at 1100 1C. At this temperature, twisted SiO x nanowires ... 2006 Abstract Amorphous silicon oxide (SiO x ) nanowires were directly grown by thermal processing of Si substrates. Au and Pd–Au thin films with thicknesses of 3 nm de...
Ngày tải lên: 16/03/2014, 15:16
Silicon nanowires grown on si(1 0 0) substrates via thermal reactions with carbon nanoparticles
... decomposition of silicon monoxide 2SiO ! Si þ SiO 2 at 1050 °C followed by the precipitation of Si atoms which are expelled from the mixture as crystalline nanowires. A direct re- duction of the SiO 2 layer ... ¼ 0:7 is the intensity ratio of pure SiO 2 and Si [25]. This result differs from the previously re- ported 3 nm thick SiO 2 layer surrounding the Si core of the Si nan...
Ngày tải lên: 16/03/2014, 15:08
Highly efficient and stable photoluminescence from silicon nanowires coated with sic
... photophysics and device physics. SiNW were synthesized by thermal evapora- tion from a mixture of silicon and silicon dioxide powder [14,15]. The SiNWs deposited on a silicon wafer have an average ... cubic silicon carbide (b-SiC) using an ion beam deposition technique. High resolution transmission electron microscopy (HRTEM) showed that silicon oxide shells originally cladding...
Ngày tải lên: 16/03/2014, 15:05
Ultrafine and uniform silicon nanowires grown with zeolites
... of a single SiNW. In the TEM results, we found each SiNW has a very fine crystalline silicon core and a thick amorphous silicon dioxide outer layer. The diam- eters of the Si cores range from ... re- gime, SiO nanoclusters disproportionated to form Si and SiO 2 and resulted in the precipitation of silicon nanoparticles (the nuclei of Si nanowires) surrounded by shells of silic...
Ngày tải lên: 16/03/2014, 15:09
Báo cáo y học: "Does Flavanol Intake Influence Mortality from Nitric Oxide-Dependent Processes
... Medical diagnosis follows a well-defined se- quence in which suspicion is raised from findings ob- tained from a medical history and physical examina- tion, followed up with specific tests designed ... large. Our original hypothesis was that this would be the case if flavanol-rich cocoa and its influ- ence on nitric oxide synthesis had implications for disease pathogenesis, as has bee...
Ngày tải lên: 31/10/2012, 15:12
Amorphous silica nanowires grown by the vapor–solid mechanism
... of the silica nanowires significantly, indicating the Fig. 3. EDS spectra according to the positions of the silica nanowires: (b) from seeds; (c) from nanowires near to the seeds; (d) from nanowires. ... synthesized by using silica nanoparticles as a growth catalyst using a gas composed of CH 4 and H 2 at 1050 °C. Silica nanoparticles provide silicon and oxygen atoms for the form...
Ngày tải lên: 16/03/2014, 15:03
Deposition of carbon nanotubes on si nanowires by chemical vapor deposition
... new oxide- assisted growth method by which high-purity SiNWs can be synthesized in large scale from a mixture of Si and SiO 2 powders or from pure SiO powder [12± 15]. This supplied a good as -grown ... temperature of deposition increased to 1000°C, Si cores tended to transform into b-SiC cores and the carbon layers grown on b-SiC cores were distorted. When the temperature of depo...
Ngày tải lên: 16/03/2014, 15:04
High frequency FTIR absorption of sio2 si nanowires
... has no silicon single crystal core. Second, the difference comes from the interface structure of the SiO 2 /Si nano - wires. In SiO 2 /Si nanowires, the interface between silicon core and SiO 2 outer ... amorphous SiO 2 of silicon nanowires and in the interface be- tween silicon crystal and amorphous SiO 2 . How- ever, the detailed structural features of the surface of silico...
Ngày tải lên: 16/03/2014, 15:05