The Experts below are selected from a list of 8148 Experts worldwide ranked by ideXlab platform
Noboru Yamazoe - One of the best experts on this subject based on the ideXlab platform.
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water oxygen interplay on Tin Dioxide surface implication on gas sensing
Chemical Physics Letters, 2005Co-Authors: Dorota Koziej, Nicolae Bârsan, Udo Weimar, Jacek Szuber, Kengo Shimanoe, Noboru YamazoeAbstract:Abstract Resistance measurements and direct spectroscopic investigations were used to monitor the surface reaction path between oxygen and water at the surface of SnO 2 . The experiments were carried out at high sensor operation temperature (330 and 400 °C) and at a constant background of water vapour. We found that there is a significant interaction between adsorbed oxygen ions and water vapour, which results in formation of terminal hydroxyl groups on Tin Dioxide surface. This observation is an evidence of water–oxygen interaction and so brings a new insight to the mechanistic modelling of the sensing with Tin Dioxide based sensors.
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Water–oxygen interplay on Tin Dioxide surface: Implication on gas sensing
Chemical Physics Letters, 2005Co-Authors: Dorota Koziej, Nicolae Bârsan, Udo Weimar, Jacek Szuber, Kengo Shimanoe, Noboru YamazoeAbstract:Abstract Resistance measurements and direct spectroscopic investigations were used to monitor the surface reaction path between oxygen and water at the surface of SnO 2 . The experiments were carried out at high sensor operation temperature (330 and 400 °C) and at a constant background of water vapour. We found that there is a significant interaction between adsorbed oxygen ions and water vapour, which results in formation of terminal hydroxyl groups on Tin Dioxide surface. This observation is an evidence of water–oxygen interaction and so brings a new insight to the mechanistic modelling of the sensing with Tin Dioxide based sensors.
Dorota Koziej - One of the best experts on this subject based on the ideXlab platform.
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water oxygen interplay on Tin Dioxide surface implication on gas sensing
Chemical Physics Letters, 2005Co-Authors: Dorota Koziej, Nicolae Bârsan, Udo Weimar, Jacek Szuber, Kengo Shimanoe, Noboru YamazoeAbstract:Abstract Resistance measurements and direct spectroscopic investigations were used to monitor the surface reaction path between oxygen and water at the surface of SnO 2 . The experiments were carried out at high sensor operation temperature (330 and 400 °C) and at a constant background of water vapour. We found that there is a significant interaction between adsorbed oxygen ions and water vapour, which results in formation of terminal hydroxyl groups on Tin Dioxide surface. This observation is an evidence of water–oxygen interaction and so brings a new insight to the mechanistic modelling of the sensing with Tin Dioxide based sensors.
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Water–oxygen interplay on Tin Dioxide surface: Implication on gas sensing
Chemical Physics Letters, 2005Co-Authors: Dorota Koziej, Nicolae Bârsan, Udo Weimar, Jacek Szuber, Kengo Shimanoe, Noboru YamazoeAbstract:Abstract Resistance measurements and direct spectroscopic investigations were used to monitor the surface reaction path between oxygen and water at the surface of SnO 2 . The experiments were carried out at high sensor operation temperature (330 and 400 °C) and at a constant background of water vapour. We found that there is a significant interaction between adsorbed oxygen ions and water vapour, which results in formation of terminal hydroxyl groups on Tin Dioxide surface. This observation is an evidence of water–oxygen interaction and so brings a new insight to the mechanistic modelling of the sensing with Tin Dioxide based sensors.
Himadri Sekhar Maiti - One of the best experts on this subject based on the ideXlab platform.
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Effect of alumina addition on methane sensitivity of Tin Dioxide thick films
Sensors and Actuators B-chemical, 2001Co-Authors: Manjushree Saha, A Banerjee, A Halder, J Mondal, Amarnath Sen, Himadri Sekhar MaitiAbstract:Alumina is often used as a binder and/or stabilizer in Tin Dioxide gas sensors. In the present work, we have studied the role of alumina on the electrical properties and gas (methane) sensitivity of Tin Dioxide thick films. It has been observed that alumina, even without entering into the lattice of Tin Dioxide, can improve the sensitivity of Tin Dioxide sensors. Such behaviour can be interpreted by considering electronic interaction between the semiconducTing Tin Dioxide grains and the Lewis acid sites of alumina grains in close contact.
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Tin Dioxide thin film gas sensor
Ceramics International, 2000Co-Authors: Anoop Kumar Mukhopadhyay, Partha Mitra, A Chatterjee, Himadri Sekhar MaitiAbstract:Abstract Tin Dioxide (SnO 2 ) is the singular, most important material utilised in commercially manufactured sensors for toxic and combustible gases. In the present work, Tin Dioxide thin film sensors with porous microstructure and thickness of 0.22 μ m have been fabricated on commercially available glass slides by a novel, low-cost, modified chemical deposition technique. Here we report, for the first time, the details of structural and deposition characteristics of the same films as a function of experimental parameters such as the number of dippings, bath temperature and bath concentration. In addition, the electrical properties were studied for both as deposited and palladium sensitised films as a function of temperature (300–500 K) in a closed quartz tube furnace. Further, the gas sensitivity of the palladium sensitised Tin Dioxide thin film sensors was evaluated in air inside the same closed quartz tube furnace as a function of the operaTing temperature (150–300°C) for a fixed concentration (3 vol%) of hydrogen gas with nitrogen as the carrier gas. The sensor response could be recorded at an operaTing temperature of as low as 150°C. Maximum sensitivity of 90% was found to occur at a low temperature of only 200°C. Above this cut-off temperarure, sensitivity of the present thin film sensors was found to suffer only moderate degradation.
Zhiwen Chen - One of the best experts on this subject based on the ideXlab platform.
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Multifunctional Tin Dioxide materials: advances in preparation strategies, microstructure, and performance
Chemical communications (Cambridge England), 2015Co-Authors: Zhiwen Chen, Chan-hung Shek, Joseph K. L. LaiAbstract:Tin oxide materials are a class of unique semiconductor materials with widespread technological applications because of their valuable semiconducTing, gas sensing, electrical and optical properties in the fields of macro/mesoscopic materials and micro/nanodevices. In this review, we describe the efforts toward understanding the synthetic strategies and formation mechanisms of the micro/nanostructures of various Tin Dioxide thin films prepared by pulsed laser ablation, highlighTing contributions from our laboratory. First, we present the preparation and formation processes of tetragonal-phase Tin Dioxide thin films with interesTing fractal clusters. In addition, the quantum-dot formation and dynamic scaling behavior in tetragonal-phase Tin Dioxide thin films induced by pulsed delivery will be discussed experimentally and theoretically. Finally, we emphasize the fabrication, properties and formation mechanism of orthorhombic-phase Tin Dioxide thin films by using pulsed laser deposition. This research may provide a novel approach to modulate their competent performance and promote rational design of micro/nanodevices. Once mastered, Tin Dioxide thin films with a variety of fascinaTing micro/nanostructures will offer vast and unforeseen opportunities in the semiconductor industry as well as in other fields of science and technology.
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Assembling Tin Dioxide quantum dots to graphene nanosheets by a facile ultrasonic route.
Langmuir : the ACS journal of surfaces and colloids, 2013Co-Authors: Chen Chen, Zheng Jiao, Zhiwen Chen, Dengyu Pan, Lijun Wang, Yanyu Liu, Chan-hung ShekAbstract:Nanocomposites have significant potential in the development of advanced materials for numerous applications. Tin Dioxide (SnO2) is a functional material with wide-ranging prospects because of its ...
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Electron-Beam Irradiation Strategies for Growth Behavior of Tin Dioxide Nanocrystals
The Journal of Physical Chemistry C, 2011Co-Authors: Jian Wang, Zheng Jiao, Chan-hung Shek, Joseph K. L. Lai, Chen Chen, Zhiwen ChenAbstract:Tin oxide is a unique material of widespread technological applications, particularly in the field of strategic functional materials. Versatile strategies for growth of Tin Dioxide nanocrystals are...
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Insight on fractal assessment strategies for Tin Dioxide thin films.
ACS nano, 2010Co-Authors: Zhiwen Chen, Zheng Jiao, Bing Zhao, Chan-hung Shek, Dengyu Pan, Guoji Ding, Joseph K. L. LaiAbstract:Tin oxide is a unique material of widespread technological applications, particularly in the field of environmental functional materials. New strategies of fractal assessment for Tin Dioxide thin films formed at different substrate temperatures are of fundamental importance in the development of microdevices, such as gas sensors for the detection of environmental pollutants. Here, Tin Dioxide thin films with interesTing fractal features were successfully prepared by pulsed laser deposition techniques under different substrate temperatures. Fractal method has been first applied to the evaluation of this material. The measurements of carbon monoxide gas sensitivity confirmed that the gas sensing behavior is sensitively dependent on fractal dimensions, fractal densities, and average sizes of the fractal clusters. The random tunneling junction network mechanism was proposed to provide a rational explanation for this gas sensing behavior. The formation process of Tin Dioxide nanocrystals and fractal clusters c...
Joseph K. L. Lai - One of the best experts on this subject based on the ideXlab platform.
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Multifunctional Tin Dioxide materials: advances in preparation strategies, microstructure, and performance
Chemical communications (Cambridge England), 2015Co-Authors: Zhiwen Chen, Chan-hung Shek, Joseph K. L. LaiAbstract:Tin oxide materials are a class of unique semiconductor materials with widespread technological applications because of their valuable semiconducTing, gas sensing, electrical and optical properties in the fields of macro/mesoscopic materials and micro/nanodevices. In this review, we describe the efforts toward understanding the synthetic strategies and formation mechanisms of the micro/nanostructures of various Tin Dioxide thin films prepared by pulsed laser ablation, highlighTing contributions from our laboratory. First, we present the preparation and formation processes of tetragonal-phase Tin Dioxide thin films with interesTing fractal clusters. In addition, the quantum-dot formation and dynamic scaling behavior in tetragonal-phase Tin Dioxide thin films induced by pulsed delivery will be discussed experimentally and theoretically. Finally, we emphasize the fabrication, properties and formation mechanism of orthorhombic-phase Tin Dioxide thin films by using pulsed laser deposition. This research may provide a novel approach to modulate their competent performance and promote rational design of micro/nanodevices. Once mastered, Tin Dioxide thin films with a variety of fascinaTing micro/nanostructures will offer vast and unforeseen opportunities in the semiconductor industry as well as in other fields of science and technology.
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Electron-Beam Irradiation Strategies for Growth Behavior of Tin Dioxide Nanocrystals
The Journal of Physical Chemistry C, 2011Co-Authors: Jian Wang, Zheng Jiao, Chan-hung Shek, Joseph K. L. Lai, Chen Chen, Zhiwen ChenAbstract:Tin oxide is a unique material of widespread technological applications, particularly in the field of strategic functional materials. Versatile strategies for growth of Tin Dioxide nanocrystals are...
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Insight on fractal assessment strategies for Tin Dioxide thin films.
ACS nano, 2010Co-Authors: Zhiwen Chen, Zheng Jiao, Bing Zhao, Chan-hung Shek, Dengyu Pan, Guoji Ding, Joseph K. L. LaiAbstract:Tin oxide is a unique material of widespread technological applications, particularly in the field of environmental functional materials. New strategies of fractal assessment for Tin Dioxide thin films formed at different substrate temperatures are of fundamental importance in the development of microdevices, such as gas sensors for the detection of environmental pollutants. Here, Tin Dioxide thin films with interesTing fractal features were successfully prepared by pulsed laser deposition techniques under different substrate temperatures. Fractal method has been first applied to the evaluation of this material. The measurements of carbon monoxide gas sensitivity confirmed that the gas sensing behavior is sensitively dependent on fractal dimensions, fractal densities, and average sizes of the fractal clusters. The random tunneling junction network mechanism was proposed to provide a rational explanation for this gas sensing behavior. The formation process of Tin Dioxide nanocrystals and fractal clusters c...
