UV-illumination and Au-nanoparticles enhanced gas sensing of p-type Na-doped ZnO nanowires operating at room temperature

2018 ◽  
Vol 274 ◽  
pp. 565-574 ◽  
Author(s):  
Cheng-Liang Hsu ◽  
Bo-Yu Jhang ◽  
Cheng Kao ◽  
Ting-Jen Hsueh
Keyword(s):  
Room Temperature ◽  
Au Nanoparticles ◽  
Gas Sensing ◽  
Zno Nanowires ◽  
Uv Illumination ◽  
Doped Zno ◽  
P Type

Butane Sensing Property of Si-ZnO Nanowires p-n Junction

2011 ◽  
Vol 364 ◽  
pp. 260-265 ◽  
Author(s):  
T.Y. Tiong ◽  
Chang Fu Dee ◽  
M.M. Salleh ◽  
Majlis B. Yeop ◽  
M. Yahaya
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Zno Nanowires ◽  
Vapour Transport ◽  
Initial State ◽  
Resistance Change ◽  
Boron Doped ◽  
Doped Silicon ◽  
Minimum Power Consumption ◽  
P Type

The p-n junction has been formed by using p-type boron doped silicon and n-type ZnO nanowires (NWs). It was prepared by using simple vapour-transport deposition method. Gas sensing property has been examined by measuring the resistance change of the junction sample towards 1 % of butane gas at room temperature. Significant improvement of sensing behaviour was observed from the fabricated junction sample when it was compared to sample of non-p-n junction ZnO NWs. The increase in the sensitivity of the p-n junction ZnO NWs and the ability to regain the sensing power by returning back to the initial state at room temperature are useful for future sensing device with minimum power consumption. Keywords: ZnO nanowires, Si-ZnO nanowires p-n junction, room temperature sensing and butane gas

UV-illumination room-temperature gas sensing activity of carbon-doped ZnO microspheres

2012 ◽  
Vol 161 (1) ◽  
pp. 292-297 ◽  
Author(s):  
Jiali Zhai ◽  
Lingling Wang ◽  
Dejun Wang ◽  
Yanhong Lin ◽  
Dongqing He ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Carbon Doped ◽  
Uv Illumination ◽  
Doped Zno

UV-enhanced NO2 gas sensing properties of polystyrene sulfonate functionalized ZnO nanowires at room temperature

2019 ◽  
Vol 6 (1) ◽  
pp. 176-183 ◽  
Author(s):  
Jing Wang ◽  
Mingying Yu ◽  
Xian Li ◽  
Yi Xia
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Zno Nanowires ◽  
Polystyrene Sulfonate ◽  
Sensing Properties ◽  
Uv Illumination ◽  
Highly Sensitive ◽  
Gas Sensing Properties

PSS-functionalized ZnO nanowires exhibited a highly sensitive, fast, reversible and stable optoelectronic response to NO2 under UV illumination.

Synergistic effects of SnO2 and Au nanoparticles decorated on WS2 nanosheets for flexible, room-temperature CO gas sensing

2021 ◽  
Vol 332 ◽  
pp. 129493
Author(s):  
Jae-Hun Kim ◽  
Jin-Young Kim ◽  
Ali Mirzaei ◽  
Hyoun Woo Kim ◽  
Sang Sub Kim
Keyword(s):  
Room Temperature ◽  
Au Nanoparticles ◽  
Gas Sensing ◽  
Synergistic Effects ◽  
Ws2 Nanosheets ◽  
Co Gas

scholarly journals Gold and ZnO-Based Metal-Semiconductor Network for Highly Sensitive Room-Temperature Gas Sensing

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3815
Author(s):  
Renyun Zhang ◽  
Magnus Hummelgård ◽  
Joel Ljunggren ◽  
Håkan Olin
Keyword(s):  
Solar Cells ◽  
Gas Sensor ◽  
Network Structure ◽  
Room Temperature ◽  
Gas Sensing ◽  
Zno Nanowires ◽  
Gold Particles ◽  
Highly Sensitive ◽  
Semiconductor Electronics ◽  
New Type

Metal-semiconductor junctions and interfaces have been studied for many years due to their importance in applications such as semiconductor electronics and solar cells. However, semiconductor-metal networks are less studied because there is a lack of effective methods to fabricate such structures. Here, we report a novel Au–ZnO-based metal-semiconductor (M-S)n network in which ZnO nanowires were grown horizontally on gold particles and extended to reach the neighboring particles, forming an (M-S)n network. The (M-S)n network was further used as a gas sensor for sensing ethanol and acetone gases. The results show that the (M-S)n network is sensitive to ethanol (28.1 ppm) and acetone (22.3 ppm) gases and has the capacity to recognize the two gases based on differences in the saturation time. This study provides a method for producing a new type of metal-semiconductor network structure and demonstrates its application in gas sensing.

Intrinsic n- and p-Type MgZnO Nanorods for Deep-UV Detection and Room-Temperature Gas Sensing

2015 ◽  
Vol 119 (52) ◽  
pp. 29186-29192 ◽  
Author(s):  
Ruey-Chi Wang ◽  
Yu-Xian Lin ◽  
Jia-Jun Wu
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Uv Detection ◽  
Deep Uv ◽  
P Type

DEFECT FORMATION AND MAGNETIC PROPERTIES OF COPPER DOPED ZnO NANOWIRES

2012 ◽  
Vol 26 (13) ◽  
pp. 1250081 ◽  
Author(s):  
LI-BIN SHI
Keyword(s):  
Magnetic Properties ◽  
Density Functional ◽  
Oxygen Vacancies ◽  
Defect Formation ◽  
Zno Nanowires ◽  
Energy Calculation ◽  
Generalized Gradient ◽  
Total Energies ◽  
Doped Zno ◽  
P Type

Theoretical calculation based on density functional theory (DFT) and generalized gradient approximation (GGA) has been carried out in studying defect formation energies, ionization energies and magnetic properties of copper doped ZnO nanowires (NW). It is found from formation energy calculation that n-type Cu-doped ZnO NW is non-FM and p-type Cu-doped ZnO NW could be FM. The results show that total energies of FM coupling are lower than those of AFM coupling for majority of 12 configurations, indicating that the FM coupling between Cu atoms is more stable than AFM coupling. The FM stability is interpreted by Cu 3d energy level coupling. In addition, zinc and oxygen vacancies affecting FM coupling is also discussed. It is found that FM coupling can be tuned by zinc and oxygen vacancies.

Characteristics of point defects on the room temperature ferromagnetic and highly NO2 selectivity gas sensing of p-type Mn3O4 nanorods

2019 ◽  
Vol 285 ◽  
pp. 92-107 ◽  
Author(s):  
Ioannis Kortidis ◽  
Hendrik C. Swart ◽  
Suprakas Sinha Ray ◽  
David E. Motaung
Keyword(s):  
Point Defects ◽  
Room Temperature ◽  
Gas Sensing ◽  
P Type

scholarly journals Self-Assembled Vanadium Oxide Nanoflakes for p-Type Ammonia Sensors at Room Temperature

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 317 ◽  
Author(s):  
Haihong Yin ◽  
Changqing Song ◽  
Zhiliang Wang ◽  
Haibao Shao ◽  
Yi Li ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Room Temperature ◽  
Gas Sensing ◽  
Electron Microscopies ◽  
Ammonia Sensing ◽  
Transmission Electron ◽  
Order Of Magnitude ◽  
Self Assembled ◽  
Ammonia Sensors ◽  
P Type

VO2(B), VO2(M), and V2O5 are the most famous compounds in the vanadium oxide family. Here, their gas-sensing properties were investigated and compared. VO2(B) nanoflakes were first self-assembled via a hydrothermal method, and then VO2(M) and V2O5 nanoflakes were obtained after a heat-phase transformation in nitrogen and air, respectively. Their microstructures were evaluated using X-ray diffraction and scanning and transmission electron microscopies, respectively. Gas sensing measurements indicated that VO2(M) nanoflakes were gas-insensitive, while both VO2(B) and V2O5 nanoflakes were highly selective to ammonia at room temperature. As ammonia sensors, both VO2(B) and V2O5 nanoflakes showed abnormal p-type sensing characteristics, although vanadium oxides are generally considered as n-type semiconductors. Moreover, V2O5 nanoflakes exhibited superior ammonia sensing performance compared to VO2(B) nanoflakes, with one order of magnitude higher sensitivity, a shorter response time of 14–22 s, and a shorter recovery time of 14–20 s. These characteristics showed the excellent potential of V2O5 nanostructures as ammonia sensors.

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