Synthesis and photoluminescence property of silicon carbon nanowires synthesized by the thermal evaporation method
Synthesis and photoluminescence property of silicon carbon nanowires synthesized by the thermal evaporation method
... Synthesis and photoluminescence property of silicon carbon nanowires synthesized by the thermal evaporation method Enlei Zhang a , Yuanhong Tang a,b, Ã , Yong Zhang a , Chi Guo a a College of ... temperature to adjust the pore diameter and remove the barrier layer at the bottom of nanoholes. 2.2. Synthesis of SiC nanowires The preparation appara...
Ngày tải lên: 16/03/2014, 15:21
Large scale synthesis, characterization and photoluminescence properties of amorphous silica nanowires by thermal evaporation of silicon monoxide
... Large-scale synthesis, characterization and photoluminescence properties of amorphous silica nanowires by thermal evaporation of silicon monoxide Sanjay K. Srivastava a, Ã , ... 2009 PACS: 61.46.–w 81.07.–b Keywords: Silicon monoxide Silicon oxide nanowires Thermal evaporation Photoluminescence abstract A single step non-catalytic process based on thermal eva...
Ngày tải lên: 16/03/2014, 15:18
Preparation and photoluminescence properties of amorphous silica nanowires
... silica nanowires (SiONWs) have been synthesized by carbothermal reduction reaction between silicon dioxide and active carbons. Transmission electron microscopy (TEM) image shows the formation of the nanowires ... that of oxidized Si nanowires [16]. The growth process of the nanowires can be explained by the vapor±liquid±solid (VLS) mech- anism, since little d...
Ngày tải lên: 16/03/2014, 15:07
Characterization of tin catalyzed silicon nanowires synthesized by the hydrogen radical assisted deposition method
... FE-SEM images of the as -synthesized SiNWs at hydrogen gas flow of (a) 130 sccm, (b) 150 sccm and (c) 180 sccm. All the scale bars represent 2.5 µm. (d) XRD patterns of the as- synthesized SiNWs ... many orifices, and it is reacted with hydrogen radicals generated by microwave in the quartz discharge tube. In order to investigate the effect of synthesis conditions,...
Ngày tải lên: 16/03/2014, 15:10
Tailoring of amorphous siox nanowires grown by rapid thermal annealing
... reported that the Si L 23 ELNES of amorphous silicon monoxide appears to be a superposition of the spectra of elemental silicon and of SiO 2 [14]. The onset of the ne ar-edge structure of the nano- wire ... connected with the size of the Pt catalyst [12,13]. Fig. 2a shows the TEM micrograph of the nanowire grown after RTA at 900 °C. The seed particles...
Ngày tải lên: 16/03/2014, 15:09
Characteristics of siox nanowires synthesized via the thermal heating of cu coated si substrates
... the agglomeration of Cu layer and thus the formation of the island-like structures with a wide interspace. Therefore, nanowires may be formed independently from the locally present small islands. ... the growth process and to clearly understand the synthesis mechani sm. Fig. 4 shows the PL spectrum of the SiO x nanowires measured at room temperature, which is a...
Ngày tải lên: 16/03/2014, 15:14
hydrothermal synthesis and photoluminescence of tio2 nanowires
... indi- cated the nanowires are very copious in quantity and quite clean with no contamination attached to their surface. On the other hand, some of the nanowires aggregated into bundles in the solution Fig. ... 300–304 301 or during the preparation of SEM sample. This might explain why some of the nanowires looked wider than others. TEM and HRTEM were used to study...
Ngày tải lên: 19/03/2014, 16:48
Morphology and growth mechanism study of self assembled silicon nanowires synthesized by thermal evaporation
... [10±13] and ther- mal evaporation [14±17] are two methods nor- mally used for the synthesis of SiNWs. The key point in these two methods is the formation of a sucient amount of silicon atoms and/ or ... SiNWs reported before [5,6]. The average diameter of the main branch of SiNWs is in the range 40±60 nm, and that of the sub-branch of SiNWs is 30±40 nm....
Ngày tải lên: 16/03/2014, 15:06
Temperature dependence of morphology and diameter of silicon nanowires synthesized by laser ablation
... in the formation of chains of silicon nano- particles. The formation of the kinks of silicon nanoparticle chains resulted from a change of growth direction of the SiNWs. We examined the kinks by ... 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 si...
Ngày tải lên: 16/03/2014, 15:09
Formation of silicon oxide nanowires directly from au si and pd–au si substrates
... out for analysis of the morphology and atomic composition of the grown nanowires. 3. Results and discussion Fig. 1 shows FE-SEM images revealing the general morphologies of the thermally heated ... SiO x nanowires grown on the Au/Si substrate have an atomic ratio of Si/O higher than the 1 2 of SiO 2 . On the other hand, the atomic ratio of Si/O in the SiO...
Ngày tải lên: 16/03/2014, 15:16