ZnO Nanorod Arrays and Hollow Spheres through a Facile Room-Temperature Solution Route and Their Enhanced Ethanol Gas-Sensing Properties

ChemPlusChem ◽  
2013 ◽  
Vol 78 (10) ◽  
pp. 1266-1272 ◽  
Author(s):  
Di Bao ◽  
Peng Gao ◽  
Longqiang Wang ◽  
Ying Wang ◽  
Yujin Chen ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Hollow Spheres ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Temperature Solution ◽  
Solution Route

ZnO-Based Gas Sensors Prepared by EPD and Hydrothermal Growth

2015 ◽  
Vol 654 ◽  
pp. 94-98 ◽  
Author(s):  
Roman Yatskiv ◽  
María Verde ◽  
Jan Grym
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Gas Sensing ◽  
Low Cost ◽  
Zno Nanorods ◽  
Zno Films ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Current Voltage ◽  
Gas Sensing Properties

Arrays of vertically well aligned ZnO nanorods (NRs) were prepared on nanostructured ZnO films using a low temperature hydrothermal method. We propose the use of the low cost, environmentally friendly electrophoretic deposition technique (EPD) as seeding procedure, which allows the obtaining of homogeneous, well oriented nanostructured ZnO thin films. ZnO nanorod arrays were covered with graphite in order to prepare graphite/ZnO NRs junctions. These nanostructured junctions showed promising current-voltage rectifying characteristics and gas sensing properties at room temperature.

Soft Solution Route to Directionally Grown ZnO Nanorod Arrays on Si Wafer; Room-Temperature Ultraviolet Laser

2003 ◽  
Vol 15 (22) ◽  
pp. 1911-1914 ◽  
Author(s):  
J.-H. Choy ◽  
E.-S. Jang ◽  
J.-H. Won ◽  
J.-H. Chung ◽  
D.-J. Jang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Ultraviolet Laser ◽  
Solution Route ◽  
Si Wafer

A Comparative Study of N-Type ZnO and P-Type NiO Nanostructures for the Detection of Aqueous Ethanol Solution

2013 ◽  
Vol 573 ◽  
pp. 127-130
Author(s):  
Min Ren Zhang ◽  
Hong Hui Lai ◽  
Yi Mu Lee ◽  
Chun Hung Lai ◽  
Yi Der Wu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Aqueous Ethanol ◽  
Ethanol Solution ◽  
Electrical Impedance Spectroscopy ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Sensing Properties ◽  
Conduction Process ◽  
P Type

N-type ZnO nanorod arrays and p-type NiO thin films have been prepared on the ITO substrates by chemical bath deposition (CBD) and sol-gel spin coating method, respectively, then followed by thermal treatment at 400 °C for 1 h. The ZnO nanorod arrays have length of around 1.5 μm and diameter of around 55 nm; the thickness of the NiO film is around 340 nm with average grain size of 22 nm. The sensing properties of the n-type ZnO and the p-type NiO for the detection of aqueous ethanol solutions at room temperature are investigated using electrical impedance spectroscopy (EIS). The EIS results reveal that the series resistance (Rs) is as low as 27 Ω; the charge-transfer resistance (Rct) remarkably contributes to the sensing properties of the ethanol sensor, and decreases with a decreasing concentration (99.5%-1%) from 17.0 kΩ to 2.6 kΩ. An equivalent circuit with capacitors and resistors was developed to investigate the conduction process according to complex impedance (Nyquist) diagrams. In low concentration range, the electron conduction process is dominated by the Rct and a constant phase element (CPE); however, in high concentration ethanol solution, the conduction process is dominated by polarization and decomposition of the absorbed water with larger Rct observed. Moreover, I-V measurements were carried out to evaluate the sensitivity of n-ZnO and p-NiO nanostructures at room temperature.

A facile microwave synthesis of rGO, ZrO2 and rGO–ZrO2 nanocomposite and their room temperature gas sensing properties

2019 ◽  
Vol 30 (18) ◽  
pp. 17094-17105
Author(s):  
Akshay Krishnakumar ◽  
Parthasarathy Srinivasan ◽  
Arockia Jayalatha Kulandaisamy ◽  
K. Jayanth Babu ◽  
John Bosco Balaguru Rayappan
Keyword(s):  
Microwave Synthesis ◽  
Room Temperature ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties
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