Infrared spectra of silicon nanowires
Infrared spectra of silicon nanowires
... Infrared spectra of silicon nanowires Junjie Niu a, ⁎ , Deren Yang b , Jian Sha b,c , Jian Nong Wang a , Ming Li b a School of Materials Science and Engineering, ... 310027, People's Republic of China Received 8 November 2005; accepted 7 June 2006 Available online 28 June 2006 Abstract Infrared (IR) spectra of the silicon nanowires (SiNWs) with oxide layer ... cry...
Ngày tải lên: 16/03/2014, 15:11
Carbon assisted synthesis of silicon nanowires
... char- acteristic of cubic silicon with a small impurity of silica. Reaction of silicon powder with activated car- bon in the absence of H 2 , by procedure (ii), yielded abundant quantities of SiNWs. ... to the (1 1 1) planes of silicon. The crystallinity of the nanowires is con- siderably higher when only argon was used instead of a mixture of argon and hydrogen. The...
Ngày tải lên: 16/03/2014, 15:04
Growth kinetics of silicon nanowires by platinum assisted vapour–liquid–solid mechanism
... HRTEM image of Si nanowire using Au. (d) HRTEM image of Si nanowire using Pt. Both were single crystal. (e) EDS line mapping of Si nanowires using Au catalyst. (f) EDS line mapping of Si nanowires ... degrade the performance of Si nanowire devices even if it diffuses into the nanowires. Some studies have reported on the growth of Si nanowires using Pt with a precursor of...
Ngày tải lên: 16/03/2014, 15:05
Optical spectroscopy of silicon nanowires
... 3 shows the Raman scattering spectra of the SiNWs and crystal silicon. A very sharp and Fig. 1. A typical SEM image of the morphology of aligned silicon nanowires of uniform diameter distribution ... linewidth of crystalline silicon, and D is the size of crystal. Eq. (1) was used to fit the Raman spectra. The continuous line in Fig. 3 shows the best-fit result, and the ave...
Ngày tải lên: 16/03/2014, 15:06
Temperature dependence of morphology and diameter of silicon nanowires synthesized by laser ablation
... oxide exceeded the growth rate of crystal silicon, outer layer of silicon oxide will surround the crystal sil- icon. As a result, the growth of crystal silicon ceased and silicon oxide of outer layer coalesced together ... The peculiar feature of the branch suggests that there may exist a competitive growth between crystal silicon core and outer layer of silicon oxide....
Ngày tải lên: 16/03/2014, 15:09
Temperature dependence of the quality of silicon nanowires produced over a titania supported gold catalyt
... °C. Silicon nanowires produced at this temperature have a well-crystal- lized silicon core with a very thin amorphous sili- con dioxide outer layer. The length of the nanowires is in the range of ... four different temperatures. Raman spectra of sil- icon wafer and of the fresh Au/TiO 2 catalyst are also included for comparison. Lower panel: Raman spectra of silicon nan...
Ngày tải lên: 16/03/2014, 15:09
A study in the growth mechanism of silicon nanowires with or without metal catalyst
... the catalytic growth. However, the growth of silicon nanowires with sulfide is chiefly affected by the compound decomposition, gas stream, and temperature difference. Silicon nanowires fabricated with metal ... typical sample of synthesis of SiNWs without a metal catalyst [17]. In this case, the SiO x vapor decomposes into Si atoms, which act as the nuclear of SiNWs covered by...
Ngày tải lên: 16/03/2014, 15:09
Synthesis and characterization of silicon nanowires using tin catalyst for solar cells application
... silicon nanowires were synthesized for solar cells application. Voluminous silicon nanowires were fabricated on single crystalline silicon wafer. Optical reflectance and solar cell efficiency of ... the synthesized silicon nanowires were explored. The reflectance of as-synthesized silicon nanowires was obtained approximately 5% in the short wavelength region (λb 500 nm). A...
Ngày tải lên: 16/03/2014, 15:12
Synthesis of silicon nanowires after hydrogen radical treatment
... Synthesis of silicon nanowires after hydrogen radical treatment Minsung Jeon ⁎ , Koichi Kamisako Department of Electronic and Information Engineering, Tokyo University of Agriculture and ... 2007 Accepted 16 May 2008 Available online 24 May 20 08 Keywords: Silicon nanowires Hydrogen radicals Metal oxide film Nanoparticles Silicon nanowires (SiNWs) were synthesized through the...
Ngày tải lên: 16/03/2014, 15:13
Dimensional evolution of silicon nanowires synthesized by au–si island catalyzed chemical vapor deposition
... tips of the NWs seem to be Au–Si droplets in Fig. 1(d). The diameters of the NWs are similar to those of the Au–Si droplets. The existence of a critical Au film thickness for initiation of NW ... dimensional silicon nanowires (Si-NWs) have recently become of interest for potential applications in various technologies such as optics, electronics, and chemical sensors. This is th...
Ngày tải lên: 16/03/2014, 15:15