Raman spectrum of array ordered crystalline silicon nanowires

... www.elsevier.com/locate/ph y se Physica E 23 (2004) 221–225 Raman spectrum of array- ordered crystalline silicon nanowires Jianxun Liu a , Junjie Niu b , Deren Yang b , Mi Yan c , Jian Sha a,b, * a Department of Physics, Zhejiang University, ... Si x O y has no contribution to Raman spectrum, we neglect the influence of silicon oxide sheath of SiNWs. It can be seen th...

Ngày tải lên: 16/03/2014, 15:19

... form of c-Si:Er material. Vinh et al.: Photonic Properties of Er-Doped Crystalline Silicon Vol. 97, No. 7, July 2009 | Proceedings of the IEEE 1273 Authorized licensed use limited to: Univ of Calif ... energy-level splitting of the J ¼ 15=2andJ ¼ 13=2 manifolds by a crystal field of C 2v symmetry. Vinh et al.: Photonic Properties of Er-Doped Crystalline Silicon 1274 Proc...

Ngày tải lên: 16/03/2014, 15:28

... 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 ... with the silicon nanowires and form 1D organic nanowires along the same direction. We propose that the adsorption process occurs be- tween the Si dimers of the...

Ngày tải lên: 16/03/2014, 15:35

... 3b, indicates the core to be of cubic silicon. The XRD pattern of the product, given in Fig. 2b, is char- acteristic of cubic silicon with a small impurity of silica. Reaction of silicon powder with activated ... 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 hyd...

Ngày tải lên: 16/03/2014, 15:04

... 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 ... the growth kinetics of Si nanowires fabricated with Pt via the VLS mecha- nism, and compared the results with those for nanowires fabri- cated with Au. 2. Experimental Silicon...

Ngày tải lên: 16/03/2014, 15:05

... morphology of the Si nanowires Ž. grown on a large area 10= 10 mm of 111 Si substrate after a 1 h period of growth. EDS analysis Ž. inset proved that the nanowires consist mainly of silicon. A ... consists of nanoparticles of a few Fig. 2. Schematic depiction of SiNW growth by the SLS mecha- Ž. Ž . nism: a deposition of a thin layer of Ni on the Si 111 substrate; Ž. Ž....

Ngày tải lên: 16/03/2014, 15:05

... SEM images of the nanowires grown on 5 nm Au±Pd deposited substrate. (a) Low-magni®cation images of silicon nanowires. (b) A magni®ed image of (a). Fig. 2. TEM images of the silicon nanowires ... of the nanowires is 30 nm. The alignment of the nanowires is improved. Compared with our previously work [17], we got amorphous aligned silicon nanowires instead of the...

Ngày tải lên: 16/03/2014, 15:05

... catalyst for the growth of silicon nanowires (SiNWs). Transmission electron microscopy studies of the materials showed that the nanowires have a diameter of 50–70 nm and a length of several micrometers. ... nanowires have excellent single-crys- tal characteristics. Both the CNTs and Fe play a key role in the growth process of the SiNWs. A growth mechanism was proposed for th...

Ngày tải lên: 16/03/2014, 15:06

... synthesis of SiNWs. The key point in these two methods is the formation of a sucient amount of silicon atoms and/or silicon oxide clusters in gas phase from the target powders of silicon or silicon ... properties at room temper- ature, because of its indirect band gap of $1.1 eV and a small exciton binding energy ($15 eV). In contrast, silicon nanowires (SiNWs) of a...

Ngày tải lên: 16/03/2014, 15:06

... sample. Fig. 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 ... 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...

Ngày tải lên: 16/03/2014, 15:06