gas sensing properties of nanoparticle indium - doped wo3 thick films

... Spain b Department of Microelectronics, Technical University of Brno, 60200 Brno, Czech Republic Available online 11 August 2005 Abstract The gas sensing properties of pure and indium- doped nanoparticle WO 3 thick ... reserved. Keywords: Pure and indium- doped tungsten oxide thick film; WO 3 gas sensor; Gas sensing properties 1. Introduction Nowadays, WO 3 -bas...

Ngày tải lên: 19/03/2014, 16:48

... temperatures Fig. 2. TEM image of SnO 2 nanoparticles (a); FE-SEM image of a SnO 2 thin film heat-treated at 500 ◦ C (b); TEM image of an MWCNTs -doped SnO 2 sol (c); FE-SEM image of an MWCNTs -doped SnO 2 (d). Please ... that for recovery (t 90% (gas- to-air) ) were calculated from the resistance- time data shown in Fig. 3d. The t 90%(air-to -gas) values are around 23 s, while the...

Ngày tải lên: 19/03/2014, 16:48

... Gas sensing properties of WO 3 doped rutile TiO 2 thick film at high operating temperature Sung-Eun Jo, Byeong-Geun Kang, Sungmoo Heo, Soonho Song, Yong-Jun Kim * School of Mechanical ... morphological properties of the sensing film were characterized with scanning electron microscopy (SEM), atomic force microscopy (AFM) and X-ray diffraction (XRD). The gas sensing prope...

Ngày tải lên: 19/03/2014, 16:48

... Electrical and gas- sensing properties of WO 3 semiconductor material Wang Yu-De * , Chen Zhan-Xian, Li Yan-Feng, Zhou Zhen-Lai, Wu Xing-Hui Department of Materials Science and Engineering, ... dierent temper- ature (350±800°C) for 1 h in air. Thickness of the sen- sitive bodies after sintering was approximately 0.6±0.8 mm. 2.4. Measurement of sensing properties The gas- s...

Ngày tải lên: 19/03/2014, 16:48

... 67 2000 270–274 271 Fig. 1. Change of gas sensitivity with firing temperature. This paper described the effect of NH on gas sensing 3 properties of Pt dispersed-TiO derived from precursor. 2 2. ... follows. Ž.Ž. A 75% isopropanol solution of Ti O-iPr AcAc , Nisso: 22 T-50, was used as a Ti source. Methanol solution of L-Lysine was reacted with that of T-50. Platinum salt,...

Ngày tải lên: 19/03/2014, 16:48

... 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 without platinum doping. Gas response of thick films sintered ... before measurements were carried out. Gas sensing properties of the thick films were carried out at operating temperatures ranging from 250 to 450 ◦ C. The gas...

Ngày tải lên: 19/03/2014, 16:48

... NH 3 decreased when the thickness of the gas- sensing layer was too thin. The response and recovery time of the sensor in the present study were all measured at the optimizing thickness of gas- sensing layer, ... online xxx Keywords: Nitrogen dioxide Ammonia Gas- sensing properties PbS Sensor abstract In the present paper, the gas- sensing characteristics of novel gas...

Ngày tải lên: 20/03/2014, 13:06

... material and gas- sensing properties of room-temperature tungsten oxide nanorod sensors Yong Shin Kim ∗ Department of Applied Chemistry, Hanyang University, Ansan 42 6-7 91, Republic of Korea article ... purpose of this study is to find thermal treatment con- ditions that can optimize gas- sensing performance in a tungsten oxide nanorod system. In addition, thermal treatment-...

Ngày tải lên: 20/03/2014, 13:11

... Considera- tions ofthis kind may explain theenhanced sensing capability for the Al -doped films at room temperature. For high-temperature sensing, the significant water desorption makes the neutraliza- tion ... [1]. Materials of this type can be produced by a variety of techniques including gas deposition [2], sputtering [3], sol–gel technology [4], microbi- ological preparation [5],...

Ngày tải lên: 19/03/2014, 16:48

... www.elsevier.com/locate/snb Glucose-mediated hydrothermal synthesis and gas sensing characteristics of WO 3 hollow microspheres Choong-Yong Lee, Sun-Jung Kim, In-Sung Hwang, Jong-Heun Lee ∗ Department of Materials ... the effective gas diffusion (Fig. 5). The gas response was improved fur- Fig. 7. Dynamic sensing transients of (a) R30-RH and (b) R30 sensors and (c) gas respo...

Ngày tải lên: 19/03/2014, 16:48