On-chip growth of wafer-scale planar-type ZnO nanorod sensors for effective detection of CO gas

Khoang, Nguyen Duc; Hong, Hoang Si; Trung, Do Dang; Duy, Nguyễn Văn; Hòa, Nguyễn Đức; Thinh, Dao Duc; Hieu, Nguyen Van

doi:10.1016/j.snb.2013.02.047

Cited by 76 publications

(40 citation statements)

References 34 publications

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“…For example, Wang et al [3] reported that when exposed to toluene or benzene, the depletion layer produced on the surface of ZnO nanowires became thin, leading to a resistance increase and the functionalized Au served as catalyst for the enhanced gas sensing performance. On the other hand, as an important semiconductor material with wide and direct band gap (E g = 3.37 eV), ZnO has been widely used in the detection for various gases [11][12][13][14][15][16][17][18][19][20][21][22][23]. Additionally it is widely accepted that a high selectivity toward a specific VOCs of interest has been a goal of gas sensors.…”

Section: Introductionmentioning

confidence: 99%

Mechanism for toluene detection of flower-like ZnO sensors prepared by hydrothermal approach: Charge transfer

Tang

Wang

2015

Sensors and Actuators B: Chemical

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Section: Introductionmentioning

confidence: 99%

Mechanism for toluene detection of flower-like ZnO sensors prepared by hydrothermal approach: Charge transfer

Tang

Wang

2015

Sensors and Actuators B: Chemical

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“…The on-chip growth of ZnO NRs/NWs also requires a kind of seed or catalyst layer on any surface. Unfortunately, this process leads to the risk of current leakage through the seed or catalyst layer when sensing, which results in a decrease in sensitivity [24]. However, the possibility of controlling the length and density of NWs, and thus the number of NW-NW junctions that form directly on the chips, may influence gas sensor performance because a higher number of NW-NW junctions is expected to enhance the gas sensing properties of the sensors.…”

Section: Introductionmentioning

confidence: 99%

Controllable growth of ZnO nanowires grown on discrete islands of Au catalyst for realization of planar-type micro gas sensors

Nguyen

Quy

Hòa

et al. 2014

Sensors and Actuators B: Chemical

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Controllable growth of ZnO nanowires grown on discrete islands of Au catalyst for realization of planar-type micro gas sensors. Chemical, http://dx.doi. org/10.1016/j.snb.2013.11.043 Access to the published version may require subscription. N.B. When citing this work, cite the original published paper. Sensors and actuators. B, Abstract:The proper engineering design of gas sensors and the controlled synthesis of sensing materials for the high-performance detection of toxic gas are very important in the fabrication of handheld devices. In this study, an effective design for gas sensor chips is developed to control the formation of grown ZnO nanowires (NWs). The design utilizes the dendrite islands of Au catalyst deposited on and between Pt electrodes of a planar-type micro gas sensor so that NWs can grow on instead of a continuous Au seed layer. This method results in an increase of NW-NW junctions on the device and also eliminates current leakage through the seed layer, which results in a higher sensitivity. The results show that the developed gas-sensing devices could be used to monitor NO 2 at moderate temperature (~250 °C) and/or ethanol at a high temperature (~400 °C).

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“…The mode of synthesis of the sensor materials using various precursors for sensing ammonia can be divided principally into two categories: Using ammonia containing precursors (Khoang et al., ; Rao & Rao, ; Renganathan, Sastikumar, Gobi, Yogamalar, & Bose, , 2011b; Tang et al., ) and Using precursors without ammonia containing materials (Aslam et al., ; Chang, Weng, Hsu, & Hsueh, ; Han, Huang, Shi, & Yu, ; Patil, Patil, & Patil, ; Raj et al., ; Raj, Nimal, Parmar, Sharma, & Gupta, ; Rambu et al., ; Tang et al., ; Tulliani, Cavalieri, Musso, Sardella, & Geobaldo, ; Wang, Zhang, & Zhu, ; Wang, Zhang, Zhu, & Zhu, ). …”

Section: Synthesis Of Zno‐based Sensor Materialsmentioning

confidence: 99%

“…Khoang et al. () prepared ZnO nanorods using an equimolar ratio of zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) and hexamethylenetetramine (HMTA) by the hydrothermal method (Han et al., ; Van Quy, Minh, Van Luan, Hung, & Van Hieu, ). Separate batches of the mixture were heated at 90°C for 3, 6, and 9 hr followed by washing using deionized (DI) water and ethanol, dried at 60°C, and annealed at 600°C for 5 hr.…”

Section: Synthesis Of Zno‐based Sensor Materials Using Ammonia‐contaimentioning

confidence: 99%

Development of Zinc Oxide Sensors for Detecting Ammonia Gas in the Ambient Air: A Critical Short Review

Chatterjee¹,

Bandyopadhyay

2016

Environmental Quality Mgmt

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Ammonia (NH3) is emitted into the atmosphere by various industries and other sources and causes environmental pollution. Considering the hazards of ammonia, detecting leakage from vessels and pipes demands the use of sensors. Therefore, the development of NH3 gas sensors assumes considerable importance to researchers and regulators and to industry, businesses, and facilities that make, store, or use ammonia. The use of metal oxide sensors (MOS) for detecting NH3 gas, such as zinc oxide (ZnO), has been a topic of interest to researchers seeking methods to detect NH3 gas, even at low concentrations. In this article, an attempt has been made to review the research thus far published on the synthesis of ZnO‐based NH3 gas sensor materials, their characterization, and analyses of their performance. Finally, we make several recommendations regarding the scope of future research. For example, the kinetics of the sensor materials shouldbe determined. Furthermore, extensive studies of gas–solid (NH3–ZnO) adsorption are proposed to ascertain the exact adsorption mechanism in terms of isotherm, kinetics, and diffusive mass transport, and to determine “reversibility” and “recovery” of sensor materials so they can continue sensing and activating alarms when necessary for practical applications.

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On-chip growth of wafer-scale planar-type ZnO nanorod sensors for effective detection of CO gas

Cited by 76 publications

References 34 publications

Mechanism for toluene detection of flower-like ZnO sensors prepared by hydrothermal approach: Charge transfer

Mechanism for toluene detection of flower-like ZnO sensors prepared by hydrothermal approach: Charge transfer

Controllable growth of ZnO nanowires grown on discrete islands of Au catalyst for realization of planar-type micro gas sensors

Development of Zinc Oxide Sensors for Detecting Ammonia Gas in the Ambient Air: A Critical Short Review

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