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Graphene as the active layer for gas detection
Zach, Pavel ; Prášek, Jan (referee) ; Gablech, Imrich (advisor)
The aim of this bachelor thesis is to sum up theoretical knowledge concerning gas detection by sensor with a graphene active layer. It is focused on principles and construction of selected sensors. Furthermore, this work describes values characterizing the measurement results. Both crystallographic and electrical properties of graphene are discussed as well. This thesis explains the methods of production of graphene and its derivatives and also gives a look into selected characterization methods for the study of graphene. Furthermore, this work describes the phenomena behind the sensor's ability to detect gas. At the end of this study, the results of gas measurements (NO2, NH3, H2 etc.) by a graphene transistor are interpreted.
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Gas sensors based on 1D and 2D materials
Brodský, Jan ; Glowacki, Eric Daniel (referee) ; Gablech, Imrich (advisor)
In this work, general properties of fundamental gas sensors are described. Thesis is mainly focused on chemoresistive and ChemFET types, which are further used in experimental part. Subsequently, properties, preparation and transfer methods of chosen 1D and 2D materials are described. Experimental part of this work describes design and fabrication of chips, which combine the sensing principals mentioned above for utilization of 1D and 2D materials as an active layer. Transfer methods of individual materials on fabricated chips are described and these materials are characterized by Raman spectroscopy and field effect transistor characteristics measurements. Finally, the response of chosen materials to oxidative and reductive gases is measured.
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Graphene as the active layer for gas detection
Zach, Pavel ; Prášek, Jan (referee) ; Gablech, Imrich (advisor)
The aim of this bachelor thesis is to sum up theoretical knowledge concerning gas detection by sensor with a graphene active layer. It is focused on principles and construction of selected sensors. Furthermore, this work describes values characterizing the measurement results. Both crystallographic and electrical properties of graphene are discussed as well. This thesis explains the methods of production of graphene and its derivatives and also gives a look into selected characterization methods for the study of graphene. Furthermore, this work describes the phenomena behind the sensor's ability to detect gas. At the end of this study, the results of gas measurements (NO2, NH3, H2 etc.) by a graphene transistor are interpreted.
|
|
|
Gas sensors based on 1D and 2D materials
Brodský, Jan ; Glowacki, Eric Daniel (referee) ; Gablech, Imrich (advisor)
In this work, general properties of fundamental gas sensors are described. Thesis is mainly focused on chemoresistive and ChemFET types, which are further used in experimental part. Subsequently, properties, preparation and transfer methods of chosen 1D and 2D materials are described. Experimental part of this work describes design and fabrication of chips, which combine the sensing principals mentioned above for utilization of 1D and 2D materials as an active layer. Transfer methods of individual materials on fabricated chips are described and these materials are characterized by Raman spectroscopy and field effect transistor characteristics measurements. Finally, the response of chosen materials to oxidative and reductive gases is measured.
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