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Gas sensors based on diamond heterostructures for air quality monitoring
Kočí, Michal ; Szabó, Ondrej ; Izsák, T. ; Sojková, M. ; Godzierz, M. ; Wróbel, P. ; Husák, M. ; Kromka, Alexander
Currently, great emphasis is placed on air quality and the presence of pollutants. Attention is therefore focused on new gas-sensing materials enabling detection even at low (up to room) temperatures with sufficient response and short reaction time. Here, we investigate the suitability of H-NCD films and their heterostructures with MoS2, GO, rGO, SH-GO, or Au NPs for gas sensing applications. Electrical properties are measured for oxidizing gas NO2, reducing gas NH3, and chemical vapor of ethanol, and at temperatures varied from room temperature to 125 °C. In contrast to the individual forms of employed materials with limited response to the exposed gases, the HNCD heterostructures revealed better sensing properties. In particular, the Au NPs/H-NCD heterostructures revealed a higher response at 125 °C in contrast to H-NCD, MoS2/H-NCD had quite good response even at room temperature and GO/H-NCD revealed high sensitivity to chemical vapor, which further improved for the SH-GO/HNCD.
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Monitoring the living environment in the house
Dlugoš, Daniel ; Ježek, Michal (referee) ; Staněk, Kamil (advisor)
This work, tries to create a small, rechargeable and portable device that senses temperature, humidity, barometric pressure, dust particles, carbon dioxide and VOC concentration. The air quality monitor can reliably measure the physical quantities encountered in every indoor environment, evaluate them and display them to the user. The sensors, data storage module and OLED display are housed on a custom-made PCB board.
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Device for Monitoring of Air Quality
Jašek, Filip ; Drahanský, Martin (referee) ; Goldmann, Tomáš (advisor)
The thesis deals with the design and implementation of air quality monitoring devic using selected sensors (RHT03, MQ-2, MQ-7) on STM Nucleo F446RE microcontroller platform. The next section describes the development of a mobile application to read out measured data using Bluetooth Low Energy created with the NativeScript framework primarily for the Android platform. Part of the thesis is the test operation of the measuring device and evaluation of the results.
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Monitoring the living environment in the house
Dlugoš, Daniel ; Ježek, Michal (referee) ; Staněk, Kamil (advisor)
This work, tries to create a small, rechargeable and portable device that senses temperature, humidity, barometric pressure, dust particles, carbon dioxide and VOC concentration. The air quality monitor can reliably measure the physical quantities encountered in every indoor environment, evaluate them and display them to the user. The sensors, data storage module and OLED display are housed on a custom-made PCB board.
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Device for Monitoring of Air Quality
Jašek, Filip ; Drahanský, Martin (referee) ; Goldmann, Tomáš (advisor)
The thesis deals with the design and implementation of air quality monitoring devic using selected sensors (RHT03, MQ-2, MQ-7) on STM Nucleo F446RE microcontroller platform. The next section describes the development of a mobile application to read out measured data using Bluetooth Low Energy created with the NativeScript framework primarily for the Android platform. Part of the thesis is the test operation of the measuring device and evaluation of the results.
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