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

... Morphology and growth mechanism study of self- assembled silicon nanowires synthesized by thermal evaporation Z. Zhang1, X.H. Fan, L. Xu, C.S. Lee, S.T. Lee*Center of Super-Diamond and ... related to the morphology and growth temperature. We showthat the formation of SiNWs is indeed closely re-lated to the amorphous SiO particles, and the growth and self- assembling process of SiNWs ... silicon atoms and/ or silicon oxide clusters in gas phase from the target powders of silicon or silicon oxide by laser ablation or hightemperature evaporation. A growth mechanism for these two...

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 Information ... growth mechanism at temperatures higher than the Sn–Si eutectic temperature. This VLS mechanism has been introduced by Wagner et al. to growth single crystalline silicon [9]. A typical VLS growth ... online 9 October 2008Keywords:Tin catalyst Silicon nanowires Hydrogen radicalsVLS mechanism Phase diagramTin-catalyzed silicon nanowires (SiNWs) were synthesized at various hydrogen gas ﬂow rates...

Silicon nanowires fabricated by thermal evaporation of silicon monoxide

... crystalline silicon nanowires (SiNWs) with a diameter of ∼30 nm and length of tens of micrometers onAl2O3templates and silicon wafers were synthesized by the thermal evaporation of silicon monoxide ... successfully synthesized largequantity of uniform crystalline SiNWs on Al2O3templates and silicon wafers by thermal evaporation of silicon monoxide (SiO) at 1100◦C, respectively.The results of ... 134www.elsevier.com/locate/physe Silicon nanowires fabricated by thermal evaporation of silicon monoxideJunjie Niua, Jian Shaa; b, Deren Yanga;∗aState Key Lab of Silicon Materials, Zhejiang...

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 ... dependence of the morphology of SiNWs synthesized by laser abla-tion. In this Letter, we present the results on thisproject. Our results show that the morphology and diameter of SiNWs synthesized by ... by thermal evaporation of SiO powders. The study shows that the morphology and diameter of SiNWs synthesized by laser ablation not only correlate closely with the growth temperature of SiNWs,...

Sulfide assisted growth of silicon nano wires by thermal evaporation of sulfur powders

... 2004Abstract Silicon nanowires (SiNWs) with a diameter of B20 nm were synthesized by the thermal evaporation of sulfur powders on silicon wafers. The source of the SiNWs came from the silicon substrates. ... surfaceoxidation of nanowires. This suggests that the nanowires were composed of silicon and silicon oxide as sheath. Actually, some SiNWs could beoxidized to be silicon oxide nanowires because of the ... form silicon sulﬁdes by the reaction with silicon, canalso be used to assist the growth of SiNWs. Inprinciple, all of silicon compounds, such as silicon sulﬁde shown in this paper and silicon...

Temperature-Controlled Growth of Silicon-Based Nanostructures by Thermal Evaporation of SiO Powders

... VLS7-10 and laser ablation.11-15In thermal evaporation, oxides were found to play a dominant rolein the nucleation and growth of Si nanowires. The growth mechanism of Si nanowires from thermal evaporation ... Temperature-Controlled Growth of Silicon- Based Nanostructures by Thermal Evaporation of SiO PowdersZ. W. Pan,†Z. R. Dai,†L. Xu,‡S. T. Lee,‡,* and Z. L. Wang*,†,§School of Materials Science and Engineering, ... Si/SiO2target,11,15 and thermal evaporation of Si-SiO2mixture11,16,17or SiO pow-ders.11,18Among these techniques, the thermal evaporation techniquedeveloped by Lee et al.11is of particular interest and...

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

... 2006AbstractThis study explores the nucleation and 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 ... materials[3]. In metal island-catalyzed growth of Si-NWs via theVLS processes, the diameter and alignment of the NWs canbe readily controlled by the size of the catalytic metalislands and the substrate ... 153–157Dimensional evolution of silicon nanowires synthesized by Au–Si island-catalyzed chemical vapor depositionD.W. Kwak, H.Y. Cho, W C. YangÃDepartment of Physics and Quantum-Functional Semiconductor...

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

... (red band), and 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 ... 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. 1(b). Thus, it is conﬁrmed that, V acted as a catalyst inthe growth of silica nanowires; ... 218–223Photoluminescence and growth mechanism of amorphous silica nanowires by vapor phase transportY. Yanga, B.K. Taya, X.W. Suna,Ã, H.M. Fanb, Z.X. ShencaSchool of Electrical and Electronic...

hydrothermal synthesis and characterization of self - assembled h - wo3

... techniques. 1D self- assembled h-WO3nanowire bundles of ∼100 nm diameter and 1–2 ␮m lengthwere comprised of several individual uniform nanowires of 4–6nm diameter. These individual nanowires served ... two growth stages: the growth of aggregate particles is facilitated and followed by the growth of 1D nanorods to form the urchin-likestructure.TEM andHR-TEMmicrographs of h-WO3nanostructures ... and luminescence properties. Thesynthesis of 1D self- assembled h-WO3nanowire bundles and urchin-like structures was differentiated by means of Na+- and NH4+-based EDTA salt solutions.©...

morphology change of self-assembled zno 3d nanostructures with different ph

... attributed to the growth rates of spe-ciﬁc planes of the ZnO nanorods. At pH 10.5 and 11.0, the growth rate for the (0 0 2) plane was large, and the growth rates of the(1 00) and (1 1 0) planes ... property and crystalquality of self- assembled ZnO 3D nanostructure were obtained atpH 10.5.AcknowledgmentsThis study was supported by the ERC (Center for Materials and Processes of Self- Assembly) ... other activator.In this study, a simple hydrothermal synthesis was developedto produce self- assembled ZnO three-dimensional (3D) nanostruc-tures, and the morphology of the ZnO 3D nanostructures...

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