ALD nano-catalyst for micro-calorimetric detection of hydrocarbons

Bíró, Ferenc; Dücső, Csaba; Radnóczi, G.; Baji, Zsófia; Takács, Máté; Bársony, I.

doi:10.1016/j.snb.2017.03.075

Cited by 20 publications

(11 citation statements)

References 32 publications

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“…In addition to MOS sensors other sensors are also available for CH 4 detection such as optical sensors [219], calorimetric sensors [220], pyroelectric sensors [221], electrochemical [222] and photoacoustic detection [223]. Li et al [224] reported CH 4 detection based on QEPAS using a high-power continuous wave, single-mode diode laser with an emission wavelength at 2.3 µm and demonstrated the minimum detection limit of a CH 4 -QEPAS sensor is 7.9 ppm.…”

Section: Metal Oxide Semiconductor-based Methane Gas Sensorsmentioning

confidence: 99%

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Nanostructured metal oxide semiconductor-based sensors for greenhouse gas detection: progress and challenges

Gautam¹,

Sharma²,

Tyagi³

et al. 2021

R. Soc. open sci.

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Climate change and global warming have been two massive concerns for the scientific community during the last few decades. Anthropogenic emissions of greenhouse gases (GHGs) have greatly amplified the level of greenhouse gases in the Earth's atmosphere which results in the gradual heating of the atmosphere. The precise measurement and reliable quantification of GHGs emission in the environment are of the utmost priority for the study of climate change. The detection of GHGs such as carbon dioxide, methane, nitrous oxide and ozone is the first and foremost step in finding the solution to manage and reduce the concentration of these gases in the Earth's atmosphere. The nanostructured metal oxide semiconductor (NMOS) based technologies for sensing GHGs emission have been found most reliable and accurate. Owing to their fascinating structural and morphological properties metal oxide semiconductors become an important class of materials for GHGs emission sensing technology. In this review article, the current concentration of GHGs in the Earth's environment, dominant sources of anthropogenic emissions of these gases and consequently their possible impacts on human life have been described briefly. Further, the different available technologies for GHG sensors along with their principle of operation have been largely discussed. The advantages and disadvantages of each sensor technology have also been highlighted. In particular, this article presents a comprehensive study on the development of various NMOS-based GHGs sensors and their performance analysis in order to establish a strong detection technology for the anthropogenic GHGs. In the last, the scope for improved sensitivity, selectivity and response time for these sensors, their future trends and outlook for researchers are suggested in the conclusion of this article.

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Section: Metal Oxide Semiconductor-based Methane Gas Sensorsmentioning

confidence: 99%

Section: Greenhosue Gas Sensorsmentioning

confidence: 99%

Nanostructured metal oxide semiconductor-based sensors for greenhouse gas detection: progress and challenges

Gautam¹,

Sharma²,

Tyagi³

et al. 2021

R. Soc. open sci.

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“…Calorimetric sensors are generally used to detect explosion threshold limits of hydrocarbons and other VOCs in enclosed environments. Therefore, these devices are generally optimized to detect high concentrations of organic compounds (>1000 ppm) [ 114 ]. For this reason, calorimetric devices might not be suitable for the monitoring of odors, due to the high sensitivities normally required in this type of applications.…”

Section: Gas Sensors For Vocs Detectionmentioning

confidence: 99%

“…For this reason, calorimetric devices might not be suitable for the monitoring of odors, due to the high sensitivities normally required in this type of applications. Other common disadvantages of thermal gas sensors are short lifetime and high power-consumption rates of several Watts, since they normally operate at elevated temperatures of several hundreds of degrees Celsius [ 114 ]. Nonetheless, recent efforts in the miniaturization of these devices have contributed to obtain portable and small calorimetric sensors with enhanced performance [ 115 ].…”

Section: Gas Sensors For Vocs Detectionmentioning

confidence: 99%

“…Nonetheless, recent efforts in the miniaturization of these devices have contributed to obtain portable and small calorimetric sensors with enhanced performance [ 115 ]. The fabrication of microthermal sensors using MEMS technology has shown great potential and several advantages, such as very low power consumption (

mW), higher sensitivities, lower detection limits (e.g., 4–20 ppm) [ 116 ], and faster response times (e.g., t < 15 s) [ 114 ]. Nonetheless, the miniaturization of these devices can be tedious and costly to deploy, which is an important concern for their easy and practical implementation [ 117 ].…”

Section: Gas Sensors For Vocs Detectionmentioning

confidence: 99%

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Advancements in Microfabricated Gas Sensors and Microanalytical Tools for the Sensitive and Selective Detection of Odors

Ollé

Farré-Lladós

Casals‐Terré

2020

Sensors

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In recent years, advancements in micromachining techniques and nanomaterials have enabled the fabrication of highly sensitive devices for the detection of odorous species. Recent efforts done in the miniaturization of gas sensors have contributed to obtain increasingly compact and portable devices. Besides, the implementation of new nanomaterials in the active layer of these devices is helping to optimize their performance and increase their sensitivity close to humans’ olfactory system. Nonetheless, a common concern of general-purpose gas sensors is their lack of selectivity towards multiple analytes. In recent years, advancements in microfabrication techniques and microfluidics have contributed to create new microanalytical tools, which represent a very good alternative to conventional analytical devices and sensor-array systems for the selective detection of odors. Hence, this paper presents a general overview of the recent advancements in microfabricated gas sensors and microanalytical devices for the sensitive and selective detection of volatile organic compounds (VOCs). The working principle of these devices, design requirements, implementation techniques, and the key parameters to optimize their performance are evaluated in this paper. The authors of this work intend to show the potential of combining both solutions in the creation of highly compact, low-cost, and easy-to-deploy platforms for odor monitoring.

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