WO3 nanoparticle and Polypyrrole nanowire

... sensing properties of Polypyrrole nanowires” [9] M. Brie, R. Turcu, C. Neamtu, S. Pruneanu, “The effect of initial conductivity and doping anions on gas sensitivity of conducting polypyrrole films ... large-scale WO3 nanowire- like structure for high sensitivity NH3 gas sensor through a simple route”, Current Applied Physics 11 (2011) 657e661 [6] Janarthanan Rajeswari, Pilli Satyana...

Ngày tải lên: 23/04/2014, 23:16

... as-deposited state and after sintering at a temperature T between 100 and 600 ◦ C. Peaks denoted by m, t, and (*)Al 2 O 3 are characteristic for the mon- oclinic and tetragonal phases of WO 3 and for the ... 525, and 700 K for H 2 S, NO 2 , and CO, respectively. Importantly, the sensor did Fig. 8. Conductance response of an as-deposited Au-activated WO 3 sensor upon CO (50 and...

Ngày tải lên: 19/03/2014, 16:48

... 2004 Abstract Low-level detection of ethanol and H 2 S was achieved with thermally modulated WO 3 nanoparticle gas sensors. Nanoparticle WO 3 films, with a mean grain size of ∼5 nm and a thickness of ∼20 ␮m, were ... by WO 3 nanoparticle gas sensors, and it was shown that even lower detection limits could be achieved [4,19,20]. In the present paper, we go further and realise a ca...

Ngày tải lên: 20/03/2014, 13:04

... whereas (1 0 0) and (1 1 1) nanowires converge towards the G2X value. Figs. 2 and 3 show the band dispersion along the nanowire direction for Si and Ge nanowires with D$20 ˚ A. The Si nanowires maintain ... the band structures for both Ge and Si nanowires oriented along the (1 0 0), (1 1 0) and (1 1 1) directions. We show that the nature of the band gap and the variation of the...

Ngày tải lên: 16/03/2014, 15:18

... applied voltage and temperature by analyzing the transition rate W(E,T)of electron/hole from deep center to conduction band and using in this manner dependences on the field strength and on temperature, ... the I–V characteristics in the amor- phous silicon nanostructures and GaAs nanowires recently published in Refs. [1,9]. 2. Theory and a comparison with experimental data If the cu...

Ngày tải lên: 16/03/2014, 15:18

... in SiNWs and GeNWs: quantum confinement and anisotropy effects In this section, we will describe the electronic properties of hydrogen passivated, free standing silicon and germa- nium nanowires ... between the Ge and Si nanowires is related to the dif- ferent character of the conduction band minima (CBM) in the two cases. These CBM are obtained through the folding of the bulk energy ba...

Ngày tải lên: 16/03/2014, 15:33

... formation of WO 3 nanoparticles. Fig. 3. (a)–(c) FE-SEM images of WO 3 nanoparticles deposited at 1, 3, and 10 kPa, respectively, and annealed at 600 8C. (d)–(f) FE-SEM images of WO 3 nanoparticles ... deposited at 1 kPa and annealed at 400, 600, and 800 8C, respectively. Fig. 2. XRD patterns of WO 3 nanoparticles prepared at different conditions. (a) WO 3 nanoparticles deposited at 1...

Ngày tải lên: 20/03/2014, 13:06

... compatibility with organism and its electrical and magnetic characteristics of its size and morphology. Therefore, the preparation of Fe 3 O 4 nanos- tructures and its properties research ... the sample, and the results can be seen in Figure 4(d). It can be clearly identified that the nanorods were composed of Fe and O elements, and the ratio of the number of atoms Fe and...

Ngày tải lên: 20/03/2014, 13:11

... of ITO layers about 150nm to 350nm clearly effects on the Raman and XRD spectrograms of WO 3 films. Keywords: WO3 structure, WO3 /ITO/glass, Raman spectroscopy. 1. Introduction WO 3 thin ... technique [15], thermal evaporation [15-21]. And different preparation methods have respective advantages in film quality and application. Besides optical and electrical properties, WO...

Ngày tải lên: 13/02/2014, 03:20

... some protozoa, and several species of eubacteria and archeubacteria, and are highly similar (86–91% deduced amino acid identity) [1,3,4]. V-PPase requires Mg 2+ as a cofactor, and the binding ... height. The mean width and height [± standard deviation (SD), n = 21] of purified V-PPase were 22.5 ± 3.2 nm and 1.6 ± 0.4 nm, respectively. Furthermore, major peaks on height and width...

Ngày tải lên: 16/03/2014, 02:20