Low power consumption solid electrochemical-type micro CO2 gas sensor

Lee, J.; Choi, N-J.; Lee, Hyung-Kun; Kim, J.; Lim, SangYong; Kwon, Jong-Kee; Lee, S.M.; Moon, Seung Eon; Jong, Jaap J. D. de; Yoo, Dohyuk

doi:10.1016/j.snb.2017.02.040

Cited by 27 publications

(14 citation statements)

References 11 publications

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“…The power consumption of this is at least lower by 10 times lower in magnitude when compared to the standard reference device. Furthermore, the device has lower power consumption than the CO 2 monitor reported in [40]. This validates the low-power consumption of the device reported in this work.…”

Section: ∫ ∫supporting

confidence: 86%

CLIP: Carbon Dioxide testing suitable for Low power microelectronics and IOT interfaces using Room temperature Ionic Liquid Platform

Bhide

Jagannath

Tanak

et al. 2020

Sci Rep

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Health and safety considerations of room occupants in enclosed spaces is crucial for building management which entails control and stringent monitoring of co 2 levels to maintain acceptable air quality standards and improve energy efficiency. Smart building management systems equipped with portable, low-power, non-invasive co 2 sensing techniques can predict room occupancy detection based on co 2 levels exhaled by humans. In this work, we have demonstrated the development and proof-offeasibility working of an electrochemical RtiL-based sensor prototype for co 2 detection in exhaled human breath. The portability, small form factor, embedded RTIL sensing element, integrability with low-power microelectronic and iot interfaces makes this co 2 sensor prototype a potential application for passive room occupancy monitoring. This prototype exhibits a wide dynamic range of 400-8000 ppm, a short response time of ~10 secs, and a reset time of ~6 secs in comparison to commercial standards. The calibration response of the prototype exhibits an R 2 of 0.956. With RTIL as the sensing element, we have achieved a sensitivity of 29 pF/ppm towards CO 2 at ambient environmental conditions and a three times greater selectivity towards co 2 in the presence of n 2 and o 2. CO 2 detection is accomplished by quantifying the capacitance modulations arising within the electrical double layer from the RtiL-co 2 interactions through Ac-based electrochemical impedance spectroscopy and Dcbased chronoamperometry. Monitoring of CO 2 levels has been a crucial subject of research interest worldwide in regard to efficient building occupancy management for indoor occupancy comfort and energy-savings 1. In the US, indoor air quality monitoring and occupancy comforts account for 40% of the total energy usage 2. Intelligent buildings have adopted system controls that communicate with the deployed sensor network within the building to optimize occupancy comforts and energy consumption. IOT based sensor technology is gaining attraction and has made its way into building management systems to monitor vital indoor environmental parameters such as acoustics, CO, VOC, small particulate matter, CO 2 , temperature, and humidity. Information collected from all these sensors can be utilized to predict patterns for preventing mishaps and take corrective actions in advance for effective building maintenance 3. The smart sensor network should be capable of automatically modulating its air ventilation to avoid excessive ventilation for energy savings in areas with highly variable and dense occupancy 4. Exhaled human breath is the main source of CO 2 production in indoor spaces and is a widely used indicator of room occupancy. CO 2 is regarded as a toxic contaminant with acceptable exposure limit of 5000 ppm over an 8-hour window or a short exposure limit of 15,000-30,000 ppm for 15-minutes according to OSHA and ASHREA standards. The CO 2 levels produced by humans are much higher than the CO 2 present in outdoor environment. Studies show that the indoor CO 2 concent...

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Section: ∫ ∫supporting

confidence: 86%

CLIP: Carbon Dioxide testing suitable for Low power microelectronics and IOT interfaces using Room temperature Ionic Liquid Platform

Bhide

Jagannath

Tanak

et al. 2020

Sci Rep

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“…Our study showed that sensor responses to NO 2 and response/regeneration times are comparable from sensor to sensor in air and nitrogen conditions, which suggests that the proposed simple technology connected with well-chosen operation conditions is repeatable. The operating temperature is comparable with other similar approaches, however the energy consumption can be limited through miniaturization of the transducers, for example using MEMS (microelectromechanical system) technology [ 54 , 55 ].…”

Section: Discussionmentioning

confidence: 99%

Impact of Temperature and UV Irradiation on Dynamics of NO2 Sensors Based on ZnO Nanostructures

2017

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The main object of this study is the improvement of the dynamics of NO2 sensors based on ZnO nanostructures. Investigations presented in this paper showed that the combination of temperature and ultraviolet (UV) activation of the sensors can significantly decrease the sensor response and regeneration times. In comparison with the single activation method (elevated temperature or UV), these times for 1 ppm of NO2 decreased from about 10 min (or more) to less than 40 s. In addition, at the optimal conditions (200 °C and UV), sensors were very stable, were fully scalable (in the range on NO2 concentration of 1–20 ppm) and baseline drift was significantly reduced. Furthermore, in this paper, extensive studies of the influence of temperature and carrier gas (nitrogen and air) on NO2 sensing properties of the ZnO nanostructures were conducted. The NO2 sensing mechanisms of the sensors operating at elevated temperatures and under UV irradiation were also discussed. Our study showed that sensor responses to NO2 and response/regeneration times are comparable from sensor to sensor in air and nitrogen conditions, which suggests that the proposed simple technology connected with well-chosen operation conditions is repeatable. The estimated limit of detection of the sensors is within the level of ≈800 ppb in nitrogen and ≈700 ppb in air.

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“…(5) The nickel etchback technique adopted by Bhattacharyya et al (6) decreased the power consumption to about 40 mW at 100 ℃. Furthermore, the closed-membrane-type design greatly reduced the power consumption, which was about 60 to 100 mW at 400 ℃, as was reported by Blaschke et al (7) and Baroncini et al (8) The suspended-membrane-type design had also been investigated widely: Lee et al reported a low-power-consumption microscale CO 2 gas sensor (9) fabricated by Si dry etching, which showed a power consumption of 59 mW. The suspended-membrane-type MHP was investigated by Rajeswara Rao et al (11) using molybdenum microheaters.…”

Section: Introductionmentioning

confidence: 68%

“…Low power consumption is an important parameter in evaluating the properties of MEMS gas sensors. It has been widely reported that researchers can improve the performance of gas sensors by constantly optimizing the micro-hotplatform (MHP) (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) structure and the morphology of sensing materials. (15)(16)(17)(18)(19) For example, in earlier research on MEMS gas sensors, Lee et al (4) described the great advantage of low power consumption compared with traditional gas sensors.…”

Section: Introductionmentioning

confidence: 99%

Integration of SnO2 Nanoparticles with Micro-hotplatform for Low-power-consumption Gas Sensors

Peng¹,

Xie²,

Wang³

et al. 2018

Sensors and Materials

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A gas sensor with low power consumption was manufactured using a suspended microhotplatform (MHP) fabricated by MEMS technology. Tin oxide nanoparticles, synthesized by the hydrothermal method, were deposited on the MHP by dip coating in the form of slurry. The obtained SEM images indicated that nanoparticles were well connected and uniform in size. The gas sensing performance was also investigated in both dynamic and static test systems. In the dynamic test system, the response (R air /R gas) of the sensor exhibited a representative linear relationship with hydrogen at a power of 14.42 mW and changed from 1.17 to 4.51 at 5 to 100 ppm hydrogen. In the static test system, the sensor demonstrated an obvious response to ethanol, ammonia, and glycol; the response to the target gas of ammonia at a concentration of 120 ppm reached up to 23.94. The power consumption of the sensor was only 16 mW with a platinum (Pt) heating resistor at 255 ℃.

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Low power consumption solid electrochemical-type micro CO2 gas sensor

Cited by 27 publications

References 11 publications

CLIP: Carbon Dioxide testing suitable for Low power microelectronics and IOT interfaces using Room temperature Ionic Liquid Platform

CLIP: Carbon Dioxide testing suitable for Low power microelectronics and IOT interfaces using Room temperature Ionic Liquid Platform

Impact of Temperature and UV Irradiation on Dynamics of NO2 Sensors Based on ZnO Nanostructures

Integration of SnO2 Nanoparticles with Micro-hotplatform for Low-power-consumption Gas Sensors

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