Nio-Gassensor

20181128· We compared the gas sensing properties of samples in the certain ethanol, We can found that hollow structure NiO gas sensor showed the best gassensing performance toward ethanol at 350 °C, and the porous sphere also had superior properties. Besides, we also studied intensively the growth mechanism and proposed the sensing process in this work. Experimental section. Preparations of …

20181016· Overcoming ineffective resistance modulation in ptype NiO gas sensor by nanoscale Schottky contacts Yuna Lee1,3, Hyunah Kwon1,3, JunSik Yoon2 and Jong Kyu Kim1 1Department of Materials Science and Engineering, POSTECH, Pohang 790784, Republic of Korea 2Information Research Laboratories, POSTECH, Pohang 790784, Republic of Korea Email: kimjk

20190615· The morphology of the mesoporous NiO is uniform straight rods, which can be confirmed by SEM images in Fig. wideangle Xray diffraction (XRD) pattern of the synthesized mesoporous NiO is shown in Fig. 3a. All the diffraction peaks of the sample can be well identified as the facecentered cubic NiO phase (JCPDS 471049) [41,42].In addition, no other peaks of impurities can be found.

A novel mesoporous NiO gas sensitive material was synthesized by a facile sol–gel method at room temperature. • Mesoporous NiO based sensor performed the …

20190503· Introduction Cerium oxide (CeO 2) is a most abundant rare earth metal oxide in the earth''s crust (about wt%) which usually presents in a cubic fluorite structure. 1 The unique properties of CeO 2 like high oxygen storage capacity, existing in two oxidation states (Ce 4+ and Ce 3+), large number of oxygen vacancies, and redox chemistry between Ce 4+ and Ce 3+ make it a ubiquitous ...

Download Table | Show response and recovery times of NiO gas sensor. from publication: Influence of discharge voltage on the sensitivity of the resultant sputtered NiO thin films toward hydrogen ...

NiO gas sensor. January 2016; Photonics and Nanostructures Fundamentals and Applications 18:59; Authors: Ausama Khudiar. Karlsruhe Institute of Technology; Request fulltext PDF. To read the ...

20190122· The schematic drawing of the H 2 gas sensor having nanoscale Schottky contacts on NiO NHs is shown in figure 1(a). The device is composed of an array of NiO NHs sandwiched between top and bottom electrodes, and pad electrodes, all of which are patterned by using conventional photolithography and deposited by using electronbeam evaporation.

20211122· The 3D crystal morphologies of NiO gas sensor and constantly improved sensing properties to ethanol. Journal of Materials Science: Materials in Electronics., 30 (2) (2019), pp. 17941802, /s1085401804519. CrossRef View Record in Scopus Google Scholar. H. Steinebach, S. Kannan, L. Rieth, F. Solzbacher. H 2 gas sensor performance of NiO at high temperatures in gas …

20200901· Dense nickel oxide layer on Ni foam was prepared via a facile heating method and SnO 2 nanostructures was attached to NiO through a simple dipcoating process. Construction of optimized SnO 2 thin layer, which achieved by rationally adjusting of dipcoating times of Sn(OH) 4, leads to a prominently enhanced sensing properties to sensor based on NiO foam with two times of …

The maximum sensitivity for NO2 gas is around % per ppm at moderate operating temperature of 150 °C for % Ce:NiO thin film gas sensor. The enhanced gas sensing performance for Ce:NiO is ...

The nickel oxide (NiO) thin films were deposited by dc reactive magnetron sputtering from Ni target. Investigation of surface NiO was carried out by AFM measurements. NiO films are smooth and have an average roughness of nm and nm for 100 nm and 50 nm thickness of NiO film, respectively. Measured NiO films demonstrate to detect low concentration H2 at temperature 250°C.

20200315· The pattern of XRay diffraction for the sensor material is presented in Fig. 1(a). It is confirmed from JCPDS card no. 0471049 matching that sensor material formed the facecentered cubic (FCC) structure of NiO .The structural properties of the sensor material such as crystal size, dislocation densities, and texture coefficient have a remarkable influence on the gas sensing properties of ...

gas sensing characteristics of the NiO gas sensor at 10 ppm Cl 2. A very fast response within 12 s was found with recovery time of 27 s at 10 ppm Cl 2 gas. The influence of humidity on the ...

Realtime detection of npropanol vapour is important in human health protection. Thus, we report on the influence of large surface area and crystallinity of ptype NiO nanostructures on propanol sensing characteristics. Structural properties of ptype NiO were investigated by using an Xray diffractometer and the morphology was analysed by scanning electron microscopy.

In recent years, lot of efforts was made to develop many types of nitrogen oxide gas sensors. Among them, most interesting are WO3, V2O5, TiO2, SnO2 and NiO thin films as gas sensing layers. Relatively small effort has been done to examine nickel oxide. But reasonably good electrical properties and stability in air make it feasible for the fabrication of nickel oxide thin film based gas sensors.

20200901· Novel ZnSe/NiO heterostructure nanocomposites were successfully prepared by onestep hydrothermal method. The ZnSe/NiObased sensor exhibits a response of ~ % to 8 × 10−6 NO2 at 140 °C, which is significantly higher than those of intrinsic ZnSebased (no response) and NiObased (~ %) sensors. The theoretical detection limit (LOD) of the sensor is calculated to be × 10−9 ...

Theo. Exp. NANOTECHOLOGY 4 (2020) 143147 144 by the chemical precipitation process. Where, NiO/nPSi/Si heterojunction of the gas sensor has been investigated using the chemical method.

20200601· Employed in manufacturing many industrial products, volatile organic compounds (VOCs) are often highly toxic. A diode based device has been developed that …

Optica Applicata, Vol. XLI, No. 2, 2011 Electrical and optical properties of NiO films deposited by magnetron sputtering MAREK GUZIEWICZ1*, JAKUB GROCHOWSKI1, 2, MICHAL BORYSIEWICZ1, ELIANA KAMINSKA1, JAROSLAW Z. DOMAGALA1, 3, WITOLD RZODKIEWICZ1, BARTLOMIEJ S. WITKOWSKI3, KRYSTYNA GOLASZEWSKA1, RENATA KRUSZKA1, MAREK EKIELSKI1, ANNA …

20200125· The sensing properties of NiO, Pt/NiO, and core–shell PtNiO were investigated, and PtNiO () was observed to have a higher response than Pt/NiO () and NiO () to 5000 ppm H2. The sensor response was –5000 ppm H 2 on PtNiO at room temperature with a short recovery time (Tr 90 = 8 s).