nitrogen - doped tungsten oxide nanowires

... Li-Jen Chou,* Yu-Lun Chueh, Yu-Chen Lee, Chin-Hua Hsieh, Chii-Dong Chen, Yann-Wen Lan, and Lih-Juann Chen Very dense and uniformly distributed nitrogen- doped tungsten oxide (WO 3 ) nanowires were ... field-emission behavior of tungsten oxide nanowires. small 2007, 3, No. 4, 658 – 664  2007 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim www.small-journal.com 663 Nitrogen- Do...

Ngày tải lên: 20/03/2014, 13:05

... synthesis of ultra-thin bundled tungsten oxide nanowires via a solvothermal method. In addition, the morphology and phase transforma- tion behaviour of the ultra-thin bundled nanowires under thermal ... lower supersaturation of the tungsten source, promoting the growth of tungsten oxide nanowires [11]. At higher concentration, the highly saturated WCl 6 could prohibit the grow...

Ngày tải lên: 20/03/2014, 13:08

... imaging and energy dispersive X-ray spectroscopy (EDX). Addi- tionally, the chemical bonding structure of the as-prepared products was determined by X-ray photoelectron spectro- scopy (XPS) employing ... in the as- prepared nanorods for original surface and surface after argon-ion etching for 150 s, respectively. The original surface consists of WO 3 and non-stoichiometric tungsten oxide...

Ngày tải lên: 20/03/2014, 13:08

... which indicates that the N -doped ZnO film is still n-type. The resistivity of N -doped ZnO film is estimated to be 5 Â 10 4 O cm by I–V measurement. 4. Conclusions High quality N -doped and non -doped ZnO films ... author. Tel. +8 6-4 3 1-8 922331. E-mail address: ysr@mail.jlu.edu.cn (X. Wang). 002 2-0 248/01/$ - see front matter # 2001 Published by Elsevier Science B.V. PII: S 00...

Ngày tải lên: 05/03/2014, 21:20

... of silicon oxide nanowires directly from Au/Si and Pd–Au/Si substrates Hyun-Kyu Park a , Beelyong Yang a , Sang-Woo Kim a,Ã , Gil-Ho Kim b , Doo-Hyeb Youn c , Sang-Hyeob Kim c , Sung-Lyul Maeng c a School ... as-synthesized products were characterized by field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and transmission electron microscopy measurements. The...

Ngày tải lên: 16/03/2014, 15:16

... attentions [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 ... their large surface area-to-volume ratio and the size effect. Since the report of enhanced gas sensing performance of tin oxide nano-crystallites in 1990s [1], nanomate- rial...

Ngày tải lên: 19/03/2014, 16:48

... ammonia gas sensing prop- erties of nanocrystalline tungsten oxide with and withoutplatinum doping under different processing conditions. 2. Experimental Tungsten trioxide powder was prepared ... water and dried to obtain pow- ders C and D. X-ray powder diffraction (XRD) analysis on powder A and B were carried out using Bruker Analytical X-ray diffrac- 092 5-4 005/$ – see front matter...

Ngày tải lên: 19/03/2014, 16:48

... patterns of tungsten oxide nanoparticles, nanoplatelets and nanowires. 3. Results and discussion The X-ray diffraction (XRD) patterns of tungsten oxide nanoparticles, nanoplatelets and nanowires ... properties were mea- sured using a home-built computer-controlled characterization system consisting of a test chamber, a sensor holder, a Keith- ley multimeter-2700, a Keithley electr...

Ngày tải lên: 19/03/2014, 16:48

... carrier gas-line (Ar) and O 2 gas-line were connected to the left-end of a quartz tube and their flow-rate was modulated by a digital mass-flow-control system (Aalborg, Model: GFC17S-VALD2-A0200, ... on the substrates from the up-stream (d) and the down-stream (h); FE-SEM image of SnO 2 nanowires with Au catalyst cap on the substrates from up-stream (i) and down-stream (l); EDX spectrum measu...

Ngày tải lên: 19/03/2014, 16:48

... formation mechanism of tungsten oxide nanobelts is proposed. © 2006 Elsevier B.V. All rights reserved. Keywords: Hydrothermal; Tungsten oxide; Nanobelts 1. Introduction As a new family of one-dimensional ... developed a sim ple method to prepare tungsten oxide nanobelts via physical vapor deposition process [14]. In this work, we successfully synthe- sized tungsten oxide nanobe...

Ngày tải lên: 20/03/2014, 13:04