Tailoring of amorphous siox nanowires grown by rapid thermal annealing

... Tailoring of amorphous SiOx nanowires grown by rapid thermal annealing Yi-Sheng Laia,*, Jyh-Liang Wangb, Sz-Chian Liouc, Chia-Hsun TudaDepartment of Materials Science ... demonstrate the growth of Pt-catalyzedSiOx nanowires by a simple procedure, i.e., rapid thermal annealing. The eﬀect of growth parameters on the evolu-tion of SiOx nanowires, as well as its ... electron microscopy images of (a) Pt nanoparticles onthe surface after rapid thermal annealing at 800 °C for 60 s. (b) Pt assistedSiOx nanowires grown after rapid thermal annealing at 900 °C for...

Amorphous silica nanowires grown by the vapor–solid mechanism

... 2a,shows the nanowires grown from the seed parti-cles. The diameter of the nanowires ranges be-tween 15 and 35 nm. Process time did not affect thelength and the diameter of the nanowires signifi-cantly. ... The profile resembles that of the standard EELS spectrum of amorphous silica. (c) A HRTEM photograph and a SAD patternshowing the amorphous characteristic of the nanowires. (d) A HRTEM and a ... length of the silica nanowires significantly, indicating theFig. 3. EDS spectra according to the positions of the silica nanowires: (b) from seeds; (c) from nanowires near to the seeds; (d) from nanowires. ...

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

... 1. 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 ... 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 ... pure nanowires (Fig. 5b). The presence of peaks demonstrates thatthe nanowires are composed of Si, C and small amount of O. It isfound that the molecular ratio of Si/C/O of the nanowires is about3:2:2,...

Direct growth of amorphous silica nanowires by solid state transformation of sio2 films

... and expedite the reduction of TiN by supply-ing extra hydrogen by thermal decomposition of Fig. 1. FESEM photographs of a-SiONWs nanowires grown on the substrates after annealing at 1050 °C in: ... were detected by the EELS in the nanowires. The carbon on the shell is supplied by thermal decom-position of CH4 by nickel. No carbon shells were ob-served from the silica nanowires grown in the ... formation of a titanium oxide (TiOx) phase by removal of oxygen from the silica layer [9]. The re-duction of TiN seems to be a critical factor in the growthkinetics of a-SiONWs. The growth of silica...

Large scale synthesis, characterization and photoluminescence properties of amorphous silica nanowires by thermal evaporation of silicon monoxide

... agglomerated clusters consisting of high density of nanowires. The magniﬁed view of a singlecluster is depicted in the inset of Fig. 2(d). These observationssuggest that growth of nanowires in the present ... we report large-scale synthesis of pure silica(SiO2) nanowires by a non-catalytic approach based on thermal evaporation of SiO under argon ambient with traces of oxygen.The process is simple ... Large-scale synthesis, characterization and photoluminescence properties of amorphous silica nanowires by thermal evaporation of silicon monoxideSanjay K. Srivastavaa,Ã, P.K. Singha, V.N. Singhb,...

Photoluminescence and growth mechanism of amorphous silica nanowires by vapor phase transport

... composition of the as -grown nanowires. Fig. 3(a) shows the EDXspectrum of the round tip on top of a nanowire (Fig. 2(b)),and Fig. 3(b) shows the EDX spectrum from long bundles of tangled silica nanowires ... O, 41.87 at% of Si,8.66 at% of V, 0.74 at% of Zn, and no Cl, for the catalysttip in Fig. 2(b), and 60.28 at% of O, 39.40 at% of Si,0.32 at% of V, and no Zn or Cl, for the long nanowires inFig. ... cotton-like nanowires has been obtained by Lee et al. [25] grown on TiN/Ni/Si and TiN/Ni/SiO2substrates.ARTICLE IN PRESSFig. 1. Low magniﬁcation SEM images of the amorphous silica nanowires deposited...

Growth of amorphous silicon nanowires via a solid–liquid–solid mechanism

... consists of nanoparticles of a fewFig. 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.b formation of the ... is not yetclear why the resultant nanowires are amorphous instead of crystalline, we think that the amorphous state is closely related to the more rapid speed of growth under the present conditions.Detailed ... diameter of 10; 50nm, and a length of up to a few tens of micrometers.Ž.The highly diffusive ring pattern inset of selectedŽ.area electron diffraction SAED revealed that the SiŽ.nanowires...

Growth of amorphous silicon nanowires

... of the nanowires is 30 nm. The alignment of the nanowires is improved.Compared with our previously work [17], wegot amorphous aligned silicon nanowires instead of the randomly distributed nanowires. ... SEM images of the nanowires grown on 5 nm Au±Pddeposited substrate. (a) Low-magni®cation images of silicon nanowires. (b) A magni®ed image of (a).Fig. 2. TEM images of the silicon nanowires ... observations show that the grown silicon nanowires are of an amorphous state and some of nanowires appear to bifurcate in the vertically growth process. Theeect of H2gas etchings on the catalytic...

Preparation and photoluminescence properties of amorphous silica nanowires

... that of oxidized Si nanowires [16].The growth process of the nanowires can beexplained by the vapor±liquid±solid (VLS) mech-anism, since little droplets can be seen at the tops of the nanowires ... shows the formation of the nanowires at a diameter of 60±110 nm and a length up to hundreds micrometers. Besides most smooth-surface polyp-shaped nanowires, two other forms of nanowires, named ... photoluminescence properties of amorphous silica nanowires X.C. Wu*, W.H. Song, K.Y. Wang, T. Hu, B. Zhao, Y.P. Sun, J.J. DuLaboratory of Internal Friction and Defects in Solids, Institute of Solid State...

Characteristics of siox nanowires synthesized via the thermal heating of cu coated si substrates

... report the production of SiOx nanowires by the simple heating of Cu-coated Sisubstrates. We have investigated the effect of Cu layerthickness on the growth of SiOx nanowires. We discuss thepossible ... morphology of SiOx nanowires (Arrow 1: helical nanowires or nanosprings; Arrow 2:nanoparticles). The lower right inset of (a) is the SAED pattern of SiOx nanowires. (c) HRTEM image of a single ... this raw material indeedconsists of aggregates of nanowires. Although most nanowires have straight or smoothly curved morphology,some nanowires indicated by arrow 1 exhibit the helicalstructure...

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