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Direct growth of amorphous silica nanowires by solid state transformation of sio2 films
Direct growth of amorphous silica nanowires by solid state transformation of sio2 films
... Direct growth of amorphous silica nanowires by solid state transformation of SiO2filmsKi-Hong Leea,*, Hyuck Soo Yanga, Kwang Hyeon ... 2003Published online: 5 December 2003Abstract Amorphous silica nanowires (a-SiONWs) were produced by direct solid state transformation from silica films. The silica nanowires grow on TiN/Ni/SiO2/Si substrates ... act-ing mechanism for the growth of silica nanowires [7,8].In this work, a novel growth mechanism for a-SiONWsis presented via direct solid state transformation from silica films. Titanium nitride...
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Photoluminescence and growth mechanism of amorphous silica nanowires by vapor phase transport
... that the growth process of amorphous silica nanowires is catalyst-assisted.EDX was applied to examine the chemical composition of the as-grown nanowires. Fig. 3(a) shows the EDXspectrum of the ... at% of 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 ... hydrogen-related species in the structure of SiOx(green band). The study on chemical reactions and growth of the SiOx nanowires revealed the formation process of silica nanowires in acidic environment...
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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 ... (PL) property of the as-deposited material has beeninvestigated and the growth of SiO2 nanowires is discussed on thebasis of tiny SiO2cluster formation via direct reaction of SiOvapors ... around 393 nm.Nucleation and growth of silica nanowires has been discussed on the basis of tiny oxide clusterformation that act s as nucleation centers for the nanowires growth. & 2009 Elsevier...
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Preparation and photoluminescence properties of amorphous silica nanowires
... 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 Physics, ... 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...
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Amorphous silica nanowires grown by the vapor–solid mechanism
... Conclusions Silica nanowires were synthesized by VSmechanism by using silica nanoparticles as a growth catalyst. Silica nanoparticles provide sili-con and oxygen atoms for the formation of the nanowires, ... 501formation of the nanowires is accomplished in ashort period of after starting the synthesis. Fig. 4bshows a typical growth pattern of the silica nanowires from the agglomerated silica nanopar-ticle ... 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. ...
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Growth of amorphous silicon nanowires via a solid–liquid–solid mechanism
... and growth of SiNWs through the liquid–Ž. Ž.wire LS interface; d final state of SiNW growth. The smoothsurface of the original substrate becomes rough at the end of SiNW growth. tens of nanometers. ... 224–228www.elsevier.nlrlocatercplett Growth of amorphous silicon nanowires via a solid liquid solid mechanismH.F. Yana, Y.J. Xinga,b, Q.L. Hanga, D.P. Yua,), Y.P. Wanga,J.Xua,Z.H. Xib, S.Q. FengaaDepartment of ... iscontrolled by the well-known vapor–liquid solid Ž.VLS mechanism, in which the vapor phase playsan important role in the growth of the SiNWs. Thecentral idea behind VLS growth of SiNWs is...
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Growth of amorphous silicon nanowires
... silicon nanowires are of an amorphous state and some of nanowires appear to bifurcate in the vertically growth process. Theeect of H2gas etchings on the catalytic size and the eect of catalytic ... growth of the nanowires. We think that vapor±liquid solid (VLS) mech-anism accounts for the amorphous state silicon nanowires growth in our experiment. The mecha-nism has been put forward by ... 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. ...
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Iron catalytic growth of prism shaped single crystal silicon nanowires by chemical vapor deposition of silane
... 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 proposedfor the growth of silicon nanowires ... 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, Jinxiao Mic, Yong Yanga,b,*a State Key...
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Tailoring of amorphous siox nanowires grown by rapid thermal annealing
... al. reported the fabrication of silica nanowires by solid state diffusion of silicon from the silica films [8]. The growth of SiOx nanowires via VLS mechanism or solid state diffusion is us ually ... nanowire growth. In this Letter, we demonstrate the growth of Pt-catalyzedSiOx nanowires by a simple procedure, i.e., rapid thermalannealing. The effect of growth parameters on the evolu-tion of ... result of their large surface-to-vol-ume ratio and quantum confinement effect. Numerousstudies of the growth of metal-catalyzed nanowires havebeen investigated by different groups using various growth techniques....
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