synthesis of bundled tungsten oxide nanowires with controllable morphology

... Synthesis of bundled tungsten oxide nanowires with controllable morphology Shibin Suna,b,⁎, Zengda Zoua, Guanghui MinaaSchool of Materials Science and Engineering, ... successful synthesis of ultra-thin bundled tungsten oxide nanowires via a solvothermalmethod. In addition, the morphology and phase transforma-tion behaviour of the ultra-thin bundled nanowires ... lowersupersaturation of the tungsten source, promoting the growth of tungsten oxide nanowires [11]. At higher concentration, thehighly saturated WCl6could prohibit the growth of tungsten oxide nanowires...

Polymer assisted synthesis of aligned amorphous silicon nanowires and their core shell structures with au nanoparticles

... the high dispersion of Au nanoparticles on the surface of the SiNWswithout any aggregation. The formation of the SiNWs was explained on the basis of the reaction of carbon with the native silicalayer ... of SiNWs are obtained by heating a Sisubstrate coated with carbon nanoparticles at 1050 °Cunder vacuum [11]. Wherein, the role of carbon is toreact with the oxide probably producing a suboxide-typespecies.Although ... curlywire with the average diameter of 400 nm, revealingthe typical structure of wire-like spherical particleagglomerates at the end of the wire. Fig. 3c shows amagniﬁed TEM image of a part of individual...

synthesis and optical properties of colloidal tungsten oxide nanorods

... properties of the oxide nanorod itself as well as of inorganicderivatives prepared from the oxide. Herein we report a simplelarge-scale preparation of soluble and highly crystalline tungsten oxide ... dimension of oxide nanorod is directly transferred to the resulting WS2nanotube afterreaction with H2/H2S. Thus far, preparation of single-crystalline,1-D nanostructured tungsten oxide in ... Synthesis and Optical Properties of Colloidal Tungsten Oxide NanorodsKwangyeol Lee, Won Seok Seo, and Joon T. Park*National Research Laboratory, Department of Chemistry and School of Molecular...

Preparation and photoluminescence of high density siox nanowires with fe3o4 nanoparticles catalyst

... SiOx nanowires consist of Si and O elements in an atomic ratio of approximately x=1.4–1.7. Thevapor–liquid–solid (VLS) mechanism is the main formation mechanism of SiOx nanowires. The SiOx nanowires ... been developed to prepare silicon oxide nanowires. Sincethe majority of silicon oxide nanowires fabrication methods arecatalyst-based methods, different kinds of catalysts have been used,such ... images of the nanowires, (c) The higher magniﬁcation SEM image of nanowire tops, (d) EDS of the nanowires. 115 0 X.J. Wang et al. / Materials Letters 63 (2009) 1149–115 2intensities of Fe3O4nanoparticles...

gas sensing properties of nanocrystalline tungsten oxide synthesized by acid

... ammonia gas sensing prop-erties of nanocrystalline tungsten oxide with and withoutplatinumdoping under different processing conditions.2. Experimental Tungsten trioxide powder was prepared by ... calcinations are in the range of 30–150 nm.The gas sensing properties of these powders in the form of thick ﬁlm were investigated with and withoutplatinum doping. Gas response of thick ﬁlms sintered ... element showed polycrystalline grain morphology consisting of mostly of spherical grains with grainsizesranging from 130 to 600 nm. The average grain size of this sen-sor element is 300 nm....

nitrogen - doped tungsten oxide nanowires

... high-quality tungsten oxide nanowires on a Siwafer. The growth of the WO3 nanowires is conducted bythe VS mechanism, in which tungsten oxide vapor can begenerated by reducing the tungsten oxide ... electricalproperties of tungsten oxide reported that the resistivity of amorphous tungsten oxide is about 106W cm and that of thecrystallized WO3is about 10À2–10À3W cm.[23, 26a]The lowerresistivity of ... vacuum of 10À2Torr. A tungsten filament with a diameter of several milli-meters as the heater reacted with the residual oxygen during an-nealing to form a tungsten oxide source on the surface of...

stability of anodic aluminum oxide membranes with nanopores

... properties of the AAOMs preparedin sulphuric acid and phosphoric acid are similar with that of the AAOMs prepared in the oxalic acid.In the stability studies of the AAOMs, a sulphuricacid with 1 ... 440–444www.elsevier.com/locate/plaStability of anodic aluminum oxide membranes with nanoporesS.G. Yanga,∗,T.Lia,L.S.Huanga,T.Tanga, J.R. Zhanga,B.X.Gua,Y.W.Dua,S.Z. Shib,Y.N.LubaNational Laboratory of Solid ... minutes immersing.Both of the two pieces of AAOMs were washed manytimes immediately by distilled water after they weredraw out from the testing solution.The morphology of the AAOMs was performed...

Synthesis of large scale sic–sio2 nanowires decorated with amorphous carbon nanoparticles and raman and PL properties

... origins of severalPL bands were discussed. A synthesis process of SiC–SiO2core–shell nanowires decorated with carbon nanoparticles wasexplained.2. Experiment procedureThe synthesis of SiC–SiO2 nanowires ... surface morphology. It is obvious that such highcarbon content is due to the existence of carbon nanoparticles onthe surface of nanowires. The existence of carbon nanoparticleson the surface of nanowires ... forSiC–SiO2 nanowires decorated with carbon nanoparticles has sameorigin with that reported by Ishikawa et al.At the end, we brieﬂy discuss the synthesis process of SiC–SiO2 nanowires decorated with...

facile synthesis and no2 gas sensing of tungsten oxide nanorods assembled microspheres

... report the synthesisof tungsten oxide nanorodsassembled microspheres by a facile hydrothermal method. To ourknowledge, there isno report on thegas sensing of the microsphere-like tungsten oxide ... [2,3].Nanostructures of well-established gas sensing materials like tin oxide [4–6], zinc oxide [7], tungsten oxide [8–10], titanium oxide [11,12], and indium oxide [13,14] have shown higher sensitivity,faster ... composition, the morphology of theproducts synthesized with different OA/W ratio is very different.Fig. 2 presents the FESEM images of the samples synthesized with OA/W ratio of 2:1, 3:1, 4:1,...

highly reproducible synthesis of very large-scale tin oxide nanowires

... responses of all the measured sensorsare increased linearly with increasing of concentration of ethanolgas with a small ﬂuctuation. The linear dependence of the responseto ethanol gas of Q1D ... reports [6,20]. This could offer a suitable application of Please cite this article in press as: N. Van Hieu, Highly reproducible synthesis of very large-scale tin oxide nanowires used for screen-printed ... online xxxKeywords:Gas sensor Nanowires sensorTin oxide abstractA truly simple procedure was presented for highly reproducible synthesis of very large-scale SnO2 nanowires (NWs) on silicon and...

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