21.5 A portable micro gas chromatography system for volatile compounds detection with 15ppb of sensitivity

Tzeng, Te-Hsuen; Kuo, Chia‐Jung; Wang, San-Yuan; Huang, Po-Kai; Kuo, Ping Lin; Huang, Yen‐Ming; Hsieh, Wei-Che; Yu, Shih-An; Tseng, Yufeng J.; Tian, Weiqian; Lee, Si‐Chen; Lu, Shey‐Shi

doi:10.1109/isscc.2015.7063089

Cited by 10 publications

(7 citation statements)

References 3 publications

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“…5b where 21 different VOCs are separated within 200 s by a GC-flame ionization detector (FID, red chromatogram) and the micro GC-sensor system (blue chromatogram). 167 They have been tested with a variety of analyte mixtures, including indoor air pollutants, 168 lung cancer biomarkers, 169 chemical warfare agents, 170 aromatics, 171 trichloroethylene in indoor air, 172 explosive markers 173 or VOCs for workplace exposure safety. 174 However, GC-sensor devices with proven performance under real conditions validated with a benchtop device (e.g., as shown in Fig.…”

Section: Analyte Separation In Timementioning

confidence: 99%

Highly selective gas sensing enabled by filters

et al. 2021

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Section: Analyte Separation In Timementioning

confidence: 99%

Highly selective gas sensing enabled by filters

et al. 2021

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“…All operating processes of the ZnO detectors occur at room temperature (<30 °C). It is our goal to develop an universal detector for gas chromatography system [30]. In this study, toluene was chosen as a representative VOC to demonstrate the feasibility of the proposed nanostructured detectors.…”

Section: Introductionmentioning

confidence: 99%

A Photoactivated Gas Detector for Toluene Sensing at Room Temperature Based on New Coral-Like ZnO Nanostructure Arrays

Yeh

Luo

Chen

et al. 2016

Sensors

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A photoactivated gas detector operated at room temperature was microfabricated using a simple hydrothermal method. We report that the photoactivated gas detector can detect toluene using a UV illumination of 2 μW/cm2. By ultraviolet (UV) illumination, gas detectors sense toluene at room temperature without heating. A significant enhancement of detector sensitivity is achieved because of the high surface-area-to-volume ratio of the morphology of the coral-like ZnO nanorods arrays (NRAs) and the increased number of photo-induced oxygen ions under UV illumination. The corresponding sensitivity (ΔR/R0) of the detector based on coral-like ZnO NRAs is enhanced by approximately 1022% compared to that of thin-film detectors. The proposed detector greatly extends the dynamic range of detection of metal-oxide-based detectors for gas sensing applications. We report the first-ever detection of toluene with a novel coral-like NRAs gas detector at room temperature. A sensing mechanism model is also proposed to explain the sensing responses of gas detectors based on coral-like ZnO NRAs.

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“…Therefore, total energy of 76 J can to be harvested from the employed DSSC module in one day, which is sufficient for the developed multi-sensor platform (0.277 J). Compared with other previous works [ 29 , 30 , 31 ], the developed sensing system consumes the lowest power consumption and is self-sustained.…”

Section: Resultsmentioning

confidence: 93%

A Self-Sustained Wireless Multi-Sensor Platform Integrated with Printable Organic Sensors for Indoor Environmental Monitoring

Chuang

et al. 2017

Sensors

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A self-sustained multi-sensor platform for indoor environmental monitoring is proposed in this paper. To reduce the cost and power consumption of the sensing platform, in the developed platform, organic materials of PEDOT:PSS and PEDOT:PSS/EB-PANI are used as the sensing films for humidity and CO2 detection, respectively. Different from traditional gas sensors, these organic sensing films can operate at room temperature without heating processes or infrared transceivers so that the power consumption of the developed humidity and the CO2 sensors can be as low as 10 μW and 5 μW, respectively. To cooperate with these low-power sensors, a Complementary Metal-Oxide-Semiconductor (CMOS) system-on-chip (SoC) is designed to amplify and to read out multiple sensor signals with low power consumption. The developed SoC includes an analog-front-end interface circuit (AFE), an analog-to-digital convertor (ADC), a digital controller and a power management unit (PMU). Scheduled by the digital controller, the sensing circuits are power gated with a small duty-cycle to reduce the average power consumption to 3.2 μW. The designed PMU converts the power scavenged from a dye sensitized solar cell (DSSC) module into required supply voltages for SoC circuits operation under typical indoor illuminance conditions. To our knowledge, this is the first multiple environmental parameters (Temperature/CO2/Humidity) sensing platform that demonstrates a true self-powering functionality for long-term operations.

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21.5 A portable micro gas chromatography system for volatile compounds detection with 15ppb of sensitivity

Cited by 10 publications

References 3 publications

Highly selective gas sensing enabled by filters

Highly selective gas sensing enabled by filters

A Photoactivated Gas Detector for Toluene Sensing at Room Temperature Based on New Coral-Like ZnO Nanostructure Arrays

A Self-Sustained Wireless Multi-Sensor Platform Integrated with Printable Organic Sensors for Indoor Environmental Monitoring

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