Dimensional evolution of silicon nanowires synthesized by au–si island catalyzed chemical vapor deposition

... E 37 (2007) 153–157 Dimensional evolution of silicon nanowires synthesized by Au–Si island- catalyzed chemical vapor deposition D.W. Kwak, H.Y. Cho, W C. YangÃDepartment of Physics and Quantum-Functional ... morphological evolution of silicon nanowires (Si-NWs) on Si (0 0 1) and (1 1 1) substrates synthesized using nanoscale Au–Si island- catalyzed rapid thermal chemical vapor deposition. The Au–Si islands ... orientation of the evolving Si-NWs.In this study, we investigate the morphological evolution of Si-NW s on Si substrates grown by nanoscale Au–Si island- catalyzed rapid thermal chemical vapor deposition (RTCVD)....

Temperature dependence of morphology and diameter of silicon nanowires synthesized by laser ablation

... oxideexceeded the growth rate of crystal silicon, outerlayer of silicon oxide will surround the crystal sil-icon. As a result, the growth of crystal silicon ceased and silicon oxide of outer layer coalescedtogether ... Thepeculiar feature of the branch suggests that theremay exist a competitive growth between crystal silicon core and outer layer of silicon oxide. Whenthe forming rate of outer layer of silicon oxideexceeded ... dependence of themorphology of SiNWs synthesized by laser abla-tion. In this Letter, we present the results on thisproject. Our results show that the morphology anddiameter of SiNWs synthesized by...

Morphology and growth mechanism study of self assembled silicon nanowires synthesized by thermal evaporation

... study of self-assembled silicon nanowires synthesized by thermal evaporationZ. Zhang1, X.H. Fan, L. Xu, C.S. Lee, S.T. Lee*Center of Super-Diamond and Advanced Films & Department of Physics ... ther-mal evaporation [14±17] are two methods nor-mally used for the synthesis of SiNWs. The keypoint in these two methods is the formation of asucient amount of silicon atoms and/or silicon oxide ... gas phase from the target powders of silicon or silicon oxide by laser ablation or hightemperature evaporation. A growth mechanismfor these two cases is the vapor liquid±solid (VLS)model, in...

Characterization of tin catalyzed silicon nanowires synthesized by the hydrogen radical assisted deposition method

... Characterization of Tin -catalyzed silicon nanowires synthesized by the hydrogenradical-assisted deposition methodMinsung Jeon⁎, Hisashi Uchiyama, Koichi KamisakoDepartment of Electronic and ... online 9 October 2008Keywords:Tin catalyst Silicon nanowires Hydrogen radicalsVLS mechanismPhase diagramTin -catalyzed silicon nanowires (SiNWs) were synthesized at various hydrogen gas ﬂow rates ... have been synthesized by using various methods,such as chemical vapor deposition (CVD) [9], oxide-assisted [10],template-assisted [11] and laser ablation method [12] via well-known vapor liquid–solid...

Photoluminescence of silicon nanowires obtained by epitaxial chemical vapor deposition

... 2008PACS:71.35.Ee78.55.Ae78.67.ÀnKeywords: Nanowires Silicon PhotoluminescenceExcitonElectron-hole-plasmaabstractWe have carried out photoluminescence measurements of silicon nanowires (SiNWs) obtained by the chemical vapor deposition ... 20 0-nm-thick silicon oninsulator thin ﬁlms [8–10].Simulation of the emission spectrum of an ehp by a convolu-tion product of the density of states of the carriers affected by theFermi–Dirac ... Photoluminescence of silicon nanowires obtained by epitaxial chemical vapor deposition O. Demichela,Ã, F. Oehlera, V. Calvoa,P.Noe´a,...

structure of alumina nanowires synthesized by chemical etching

... structure of alumina nanowires (ANWs) synthesized by the chemical etching of an anodic alumina membrane (AAM).The AAM was prepared by the two-step anodization method followed by the lift-off process. ... etching rates of the various oxide layers of theAAM, as determined by their anion impurity concentration.In this work, we report the structure of ANWs synthesized by the chemical etching of an AAM.2. ... surrounded by the byproducts of the reactionbetween alumina and NaOH, and (d) core-shell structured ANWs.Fig. 7. XPS spectra of ANWs. The ANWs were synthesized by the chemical etching of the AAM...

Synthesis and photoluminescence property of silicon carbon nanowires synthesized by the thermal evaporation method

... Schematic illustration of synthesized b-SiC nanowires. Fig. 2. SEM image of the nanoporous AAO template surface.Fig. 3. SEM image of b-SiC nanowires synthesized by thermal evaporation: (a)with ... than those of SiC whiskers and bulk SiC.A variety of methods on the synthesis of SiC nanowires havebeen developed, including laser ablation [6,7], chemical vapor deposition via silicon precursor ... of SiC nanowires synthesized using the AAOtemplate by thermal evaporation. It reveals that large quantities of randomly distributed wire-like products have been obtained. The nanowires are of...

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 ... Au, without loss of components by chemical reactionor evaporation. Thus, it has been demonstrated that Pt is a stablecatalyst for the VLS mechanism. The growth rate of Si nanowires with Au ... with Au.2. Experimental Silicon nanowires were fabricated by the conventional CVD pro-cess using silicon tetrachloride (SiCl4) as a precursor. Using an E-beam evaporator, Si (111) wafers...

Iron catalytic growth of prism shaped single crystal silicon nanowires by chemical vapor deposition of silane

... 2005AbstractSingle-crystal silicon nanowires with the prism structures were synthesized by chemical vapor deposition of SiH4gas at 450 °C.Fe particles which were located at the tip of the CNTs were ... Iron-catalytic growth of prism-shaped single-crystal silicon nanowires by chemical vapor deposition of silaneChen Lia,b,1, Chi Gua,b,1, Zengtao Liua,b, ... Manyeﬀorts have been made to prepare silicon nanowires (SiNWs) by diﬀerent methods, such as laser ablation[6,7], thermal evaporation deposition [8], chemical vapor deposition (CVD) [9–11], and supercritical...

Si nanowires synthesized by laser ablation of mixed sic and sio2 powders

... typicalmorphology of the materials in the yellow web. Itcan be seen that the product consists of nanowires with an average diameter of 14 nm. Most of theSiNWs are consist of straight and smoothly ... morphology is a common characteristic of wxvarious nanowires, such as SiC nanowires 15 andwxcarbon nanowires 16 . Although the nanowires havea high ratio of length to diameter, the diameterremains ... diagram of the laser ablation apparatus.Fig. 2. Morphology of Si nanowires taken from the yellowŽ.product. a Low-magnitude TEM image of Si nanowires. TheŽ.inset is SAED pattern. b HRTEM image of...

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