Transient response of a transistor-based hydrogen sensor

Tsai, Yi Ju; Lin, Kun-Wei; Chen, Huey-Ing; Liu, I-Ping; Hung, Ching‐Wen; Chen, Tzu-Pin; Tsai, Tsung-Han; Chen, Li‐Yang; Chu, Kuei-Yi; Liu, Wen‐Chau

doi:10.1016/j.snb.2008.06.034

Cited by 12 publications

(7 citation statements)

References 15 publications

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“…By putting the H 2 gas, the drain current increases rapidly. After few minutes, a quasi-saturation phenomenon becomes deceptive due to dynamic equilibrium between the H 2 absorption and desorption 38 , 39 . Under this condition, the maximum variation in drain current was 8 µA.…”

Section: Resultsmentioning

confidence: 99%

MEMS based highly sensitive dual FET gas sensor using graphene decorated Pd-Ag alloy nanoparticles for H2 detection

Sharma

Kim

2018

Sci Rep

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A low power, dual-gate field-effect transistor (FET) hydrogen gas sensor with graphene decorated Pd-Ag for hydrogen sensing applications was developed. The FET hydrogen sensor was integrated with a graphene-Pd-Ag-gate FET (GPA-FET) as hydrogen sensor coupled with Pt-gate FET as a reference sensor on a single sensor platform. The sensing gate electrode was modified with graphene by an e-spray technique followed by Pd-Ag DC/MF sputtering. Morphological and structural properties were studied by FESEM and Raman spectroscopy. FEM simulations were performed to confirm the uniform temperature control at the sensing gate electrode. The GPA-FET showed a high sensing response to hydrogen gas at the temperature of 25~254.5 °C. The as-proposed FET H2 sensor showed the fast response time and recovery time of 16 s, 14 s, respectively at the operating temperature of 245 °C. The variation in drain current was positively related with increased working temperature and hydrogen concentration. The proposed dual-gate FET gas sensor in this study has potential applications in various fields, such as electronic noses and automobiles, owing to its low-power consumption, easy integration, good thermal stability and enhanced hydrogen sensing properties.

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Section: Resultsmentioning

confidence: 99%

MEMS based highly sensitive dual FET gas sensor using graphene decorated Pd-Ag alloy nanoparticles for H2 detection

Sharma

Kim

2018

Sci Rep

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“…Several studies showed that the presence of O 2 in synthetic air promotes desorption of H 2 [23,24]. This probably due to existence of oxygen in synthetic air which creates a chemical potential causing the diffusion of hydrogen atoms from the sensing layer via hydroxyl and water forming process [24]. Reproducibility was observed when a second pulse of 1% H 2 was introduced into the chamber.…”

Section: Resultsmentioning

confidence: 99%

Hydrogen gas sensor based on highly ordered polyaniline nanofibers☆

Arsat

et al. 2009

Sensors and Actuators B: Chemical

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“…Besides carboxyl groups, CNTs are often modified by amino groups. Tsai and co-authors investigated the sensitivity of the single-walled carbon nanotubes modified by amino functional group to carbon dioxide [18].…”

Section: Introductionmentioning

confidence: 99%

“…Amino-functionalized carbon nanotubes are potentially useful as sensors for other chemical species, including metals, as well as metal ions that are part of salts and alkalis. We have previously conducted research into carbon nanotubes that were boundary modified by carboxyl [17,18], amino and nitro groups [19,20]. It was found that boundary modification of CNTs by the above mentioned functional groups results in increased sensitivity which arises due to charge transfer [21].…”

Section: Introductionmentioning

confidence: 99%

Sensors Based on Amino Group Surface-Modified CNTs

et al. 2019

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This article discusses the possibility of the fabrication of a highly sensitive sensor based on single-walled carbon nanotubes surface modified with functional amino groups (-NH2). The sensor potential for detection of alkali (sodium, lithium, and potassium) metals was investigated. The results of computer simulation of the interaction process between the sensor and an arbitrary surface of the modified tube containing atoms of the studied metals are presented. The calculations were carried out within the framework of the density functional theory (DFT) method using the molecular cluster model. It has been proved that surface-modified ammonium carbon nanotubes show high sensitivity for the metal atoms under study.

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Transient response of a transistor-based hydrogen sensor

Cited by 12 publications

References 15 publications

MEMS based highly sensitive dual FET gas sensor using graphene decorated Pd-Ag alloy nanoparticles for H2 detection

MEMS based highly sensitive dual FET gas sensor using graphene decorated Pd-Ag alloy nanoparticles for H2 detection

Hydrogen gas sensor based on highly ordered polyaniline nanofibers☆

Sensors Based on Amino Group Surface-Modified CNTs

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