Synthesis and Raman scattering of β-SiC/SiO2 core–shell nanowires

Meng, Alan; Li, Zhenjiang; Zhang, Jinli; Gao, Li; Li, Hejun

doi:10.1016/j.jcrysgro.2007.08.022

Cited by 70 publications

(46 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12), 25) An absorption peak at around 805 cm -1 corresponded to the transversal optic (TO) mode (Si-C stretching vibration) and shoulder at around 890-950 cm -1 (marked by small square) was related to the longitudinal optic (LO) vibration mode. 26) Together with STEM-EDX, TEM and XRD analyses, we believe that the produced nanowires consisted mainly of SiC core wrapped with thin layer of low crystallinity SiO2.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of .BETA.-SiC/SiO2 core-shell nanowires by simple thermal evaporation

Khongwong

Imai

Yoshida

et al. 2009

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

Beta-SiC/SiO2 core-shell nanowires were obtained in a mullite boat after the reaction between silicon nanopowder and CH4 gas at 1623 K (1350°C), without adding metal catalysts from outside. The as-grown nanowires were characterized by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, scanning TEM, and infrared-ray spectroscopy.The results showed that the typical nanowires consisted of single crystalline β -phase SiC core of 50-70 nm in diameter and a uniform wrapping layer of low crystallinity SiO2 of ~15 nm in thickness, and their lengths were up to several tens of micrometers. The nanowires axes lay along the [111] direction of β -SiC. Oxygen from the experimental setup or the raw powder should be a key factor to synthesize the core/shell nanowires.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis of .BETA.-SiC/SiO2 core-shell nanowires by simple thermal evaporation

Khongwong

Imai

Yoshida

et al. 2009

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

show abstract

“…3C-SiC/SiO 2 core-shell NW have been synthesized both by a direct heating method using WO 3 and graphite mixed powder as starting material and Ni as catalyst (Bark et al, 2006) and from a mixture of activated carbon and sol-gel derived silica embedded with Fe nanoparticles . They are also obtained using iron catalyst by chemical vapor reaction in a mixture of milled Si and SiO 2 powders and C 3 H 6 as raw materials in a graphite reaction cell (Meng et al, 2007). Alternatively, a CVD method can be employed making use of Fe as catalyst and methane as precursor (Zang et al, 2002).…”

Section: A Brief Review Of Nw Growth Methodsmentioning

confidence: 99%

Cubic SiC Nanowires: Growth, Characterization and Applications

Attolini¹,

Rossi²,

Fabbri³

et al. 2010

Nanowires

View full text Add to dashboard Cite

“…The nanowire will enhance the interfacial bonding strength of rubber and reinforcement. 15) In addition, coaxial SiC/ SiOx nanowires may be used as a good light emitting material since it can emit stable and strong intense blue-green 16) or violetblue 17) light. Therefore, synthesis and properties of SiC/SiO2 core-shell nanowires, including the effect of reaction conditions, should be attractive research fields.…”

Section: Introductionmentioning

confidence: 99%

“…Many approaches have been applied to synthesize SiC/SiO2 core-shell nanowires, such as using a one-step direct heating of Si powders and multiwall carbon nanotubes, 18) chemical vapor reaction via mixture of milled Si and SiO2 powders and C3H6, 15) reaction of SiO vapor and activated carbon fibers by high frequency induction heating, 19), 20) and so on. However, the effect of important reaction parameters on synthesis SiC/SiO2 coreshell nanowires has rarely been reported.…”

Section: Introductionmentioning

confidence: 99%

Influence of raw powder size, reaction temperature, and soaking time on synthesis of SiC/SiO2 coaxial nanowires via thermal evaporation

Khongwong

Imai

Yoshida

et al. 2009

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

High-yield SiC/SiO2 core-shell nanowires were synthesized without adding metal catalysts from outside through a simple thermal evaporation of silicon powders during decomposition of methane gas. The influence of three parameters, size of Si raw powder (50 nm and 5 μ m), reaction temperature (1573, 1623 and 1673 K), and soaking time (1, 3 and 6 h), was investigated.The typical synthesized nanowires from different conditions possess the diameter of no thicker than 100 nm with several tens micrometers in length. It was addressed that the condition using the smaller size Si powder, which contained the highest amount of oxygen, at higher temperature lead to more complete reaction to obtain a large quantity of nanowires. The synthesized nanowires at higher reaction temperature and longer soaking time possessed larger core than those nanowires prepared at lower reaction temperature and shorter soaking time. Oxidation of larger size Si powder improved yield of nanowires. Based on these results, it was suggested that the typical nanowires should be grown via the oxide-assisted growth mechanism.

show abstract

Synthesis and Raman scattering of β-SiC/SiO2 core–shell nanowires

Cited by 70 publications

References 36 publications

Synthesis of .BETA.-SiC/SiO2 core-shell nanowires by simple thermal evaporation

Synthesis of .BETA.-SiC/SiO2 core-shell nanowires by simple thermal evaporation

Cubic SiC Nanowires: Growth, Characterization and Applications

Influence of raw powder size, reaction temperature, and soaking time on synthesis of SiC/SiO2 coaxial nanowires via thermal evaporation

Contact Info

Product

Resources

About