improved electrochromical properties of sol–gel wo3 thin films by doping

... Improved electrochromical properties of sol–gel WO 3 thin films by doping gold nanocrystals N. Naseri a , R. Azimirad b , O. Akhavan a , A.Z. Moshfegh a,c, ⁎ a Department of Physics, ... films Optical properties Electrochromic properties Coloration time In this investigation, the effect of gold nanocrystals on the electrochromical properties of sol –gel Au doped WO...

Ngày tải lên: 20/03/2014, 13:04

... 2 Behaviour-type, sensor response, and times of adsorption/desorption of screen- printed and dip-coated films sensing a flux of 150 mL of N 2 with a charge of 1% NH 3 . Material Behavior-type SR (%) ... mass increment suggests further oxidation of Ti 3+/2+ states, in accordance with previous XPS studies of sol–gel TiO 2 thin films where the abundance of Ti 3+ and Ti 2+ was ob...

Ngày tải lên: 20/03/2014, 13:07

Ngày tải lên: 01/04/2014, 10:40

... determined by Micro-Kjeldahl method.  Determination of moisture content by standard AOAC.  Determination of ash content by standard AOAC  Determination of foaming possibility by method Tsumuraa ... economic efficiency for producers and reducing the amount of by- products cause environmental pollution. After hydrolysis of these by- products by enzyme Alcalase 2.4L,...

Ngày tải lên: 31/12/2013, 10:33

... preparation of large area thin films [8]. In this study, we report the preparation of CdS thin films onto microscope glass slides by CBD method. The structural, morphological and optical properties of ... Fig. 1. Typical X-ray diffractogram of CdS thin films as grown. Inset shows XRD pattern of the CdS thin films reported in [9]. B.X. Hop et al. / VNU Journa...

Ngày tải lên: 14/03/2014, 13:20

... observed during annealing of WO thin films. 3 The thin films were obtained by evaporation under vacuum of WO powder and deposition on a (0001) 3 Al O substrate. The as-deposited films are so-called 23 amorphous, ... evaporation of WO powder w 7,11 x , 3 chemical vapour deposition w 12 x or reactive sputtering of metallic tungsten by ArqO plasma w 8,13–15 x . The 2 degree...

Ngày tải lên: 20/03/2014, 13:05

... aims of this work are to prepare WO 3 thin films via a sol–gel process, using WCl 6 as a precursor and test the sensing properties of thin films to TMA gas at the low operating temperature of 70 ◦ C. 2. ... incompatible with the industrial technology of integrated circuits. Such problems can be overcome by thin films [4,5]. The thin film sensors can be fabricated by a numb...

Ngày tải lên: 20/03/2014, 13:12

... been used in the ®eld of catalysis for oxidation reactions of hydrocarbons [7]. MoO 3 has a bandgap of 3.2 eV and electrical resistivity at room tem- perature is of the order of 10 10 O cm. Multi-metal ... a response of 2.3 and a time response of 60 s to 1 ppm of NO 2 as shown in Fig. 5. 4.5. Ethanol vapor sensing The sensors where exposed to 100±600 ppm of ethanol and to 10...

Ngày tải lên: 19/03/2014, 16:47

... NO 2 sensitivity of WO 3 thin film gas sensors. Part 1. Thin film devices, sensors and actuators, Thin Solid Films 287 (1996) 258–265. [7] V. Demarne, A. Grisel, An integrated low-power thin film CO ... process of NO 2 molecules because of the cap- illary pore and large surface area. This implies the conclu- sion that this type of film will offer a good sensitivity to NO 2 gas....

Ngày tải lên: 20/03/2014, 13:07