Highly sensitive hydrogen gas sensors using single-walled carbon nanotubes grafted with Pd nanoparticles

Ju, Seonghwa; Lee, Jun Min; Jung, YunJae; Lee, Eunsongyi; Lee, Wooyoung; Kim, Sung Jin

doi:10.1016/j.snb.2010.01.055

Cited by 54 publications

(48 citation statements)

References 36 publications

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“…Response times and recovery times obtained for the samples are in good agreement [17,19,20,21,23] or lower [40] than those found for similar devices in other works.…”

Section: Tests In Synthetic Airsupporting

confidence: 86%

“…The response time as presented in this study has been defined by previous authors as the time needed by the sensor to reach a resistance value of e -1 (36.8 % of the maximum signal measured under the described experimental conditions) [21]. Likewise, the recovery time analyzed in our work has been defined as the time that the sensor needs for the measured signal to reach the Ro value after the H 2 switch [24].…”

Section: H 2 Detection Testsmentioning

confidence: 92%

“…Often, these works need a purification step of the CNTs with oxidizing agents, like H 2 SO 4 or HNO 3 , where the CNTs can be degraded and oxidized [17,21 ]. In addition, most of the reports use very difficult and expensive techniques to deposit the metal, such as sputtering, electron beam evaporation or synthesis using dendrimers to link the metal nanoparticles [14,21,22,23].…”

Section: Introductionmentioning

confidence: 99%

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Single wall carbon nanotubes loaded with Pd and NiPd nanoparticles for H2 sensing at room temperature

García-Aguilar

Miguel-García

Berenguer-Murcia

et al. 2014

Carbon

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Pd and bimetallic Ni 50 Pd 50 nanoparticles protected by polyvinylpyrrolidone (PVP) have been synthesized by the reduction-by-solvent method and deposited on single wall carbon nanotubes (SWCNTs) to be tested as H 2 sensors. The SWCNTs were deposited by drop casting from different suspensions. The Pd nanoparticles-based sensors show a very reproducible performance with good sensitivity and very low response times (few seconds) for different H 2 concentrations, ranging from 0.2 to 5 % vol. H 2 in air at atmospheric pressure. The influence of the metal nanoparticle composition, the quality of SWCNTs suspension and the metal loading have been studied, observing that all these parameters play an important role in the H 2 sensor performance. Evidence for water formation during the H 2 detection on Pd nanoparticles has been found, and its repercussion on the behaviour of the assembled sensors is discussed.The sensor preparation procedure detailed in this work has proven to be simple and reproducible to prepare cost-effective and highly efficient H 2 sensors that perform very well under real application conditions. * Corresponding author. Fax: +34 965 903454 E-mail: a.berenguer@ua.es (Á. Berenguer-Murcia) 2 1. Introduction.

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“…Response times and recovery times obtained for the samples are in good agreement [17,19,20,21,23] or lower [40] than those found for similar devices in other works.…”

Section: Tests In Synthetic Airsupporting

confidence: 86%

Section: H 2 Detection Testsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Single wall carbon nanotubes loaded with Pd and NiPd nanoparticles for H2 sensing at room temperature

García-Aguilar

Miguel-García

Berenguer-Murcia

et al. 2014

Carbon

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“…As a sensor satisfying this demand, a resistive sensor using carbon natotube (CNT) with Pd nano-particles (NPs) 2) was developed, and achieved the measurement in the concentration range from 1000 to 10 ppm. Moreover, a planar surface acoustic wave (SAW) sensor is another candidate, and the detectability was 0.1% order, using a Pd film 3) and a composite film between Pd and copper-phthalocyanine.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the response times from 10 to 90% were typically hundreds of seconds at 100 ppm. 2,5,6) Although the ball SAW sensor may be realize the widest detection range, both the dissociation and the diffusion of hydrogen atoms into the sensitive film should be promoted to shorten the response time. They may be enhanced by increasing surface area such as porous structure and by alloying catalytic element such as Pt.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Ball Surface Acoustic Wave Hydrogen Sensor with Porous Pd-Alloy Film

et al. 2014

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In order to commonly use explosive H 2 gas as an energy source, fast, sensitive, and low-power consumption sensor is required. We developed a ball surface acoustic wave (SAW) sensor with porous PdPt alloy film to realize such a sensor. The sensor with 20% Pt alloying film was useful for the suppression of a phase transition of Pd and the detection of ppm order concentration at 35°C. The amplitude response was proportional to the square root of the concentration, which was demonstrated for the first time in the field of SAW sensor, resulting in the detection limit of 3.7 ppm at signal to noise ratio of 3. The response time decreased to 1/5, compared with those of pioneering H 2 sensors working at room temperature. From these results, it was shown that the fastest and most sensitive hydrogen sensor working at room temperature could be realized using the ball SAW sensor with porous Pd alloy film.

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Dendrimers as Chemical Sensors

Caminade

2011

Dendrimers

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Highly sensitive hydrogen gas sensors using single-walled carbon nanotubes grafted with Pd nanoparticles

Cited by 54 publications

References 36 publications

Single wall carbon nanotubes loaded with Pd and NiPd nanoparticles for H2 sensing at room temperature

Single wall carbon nanotubes loaded with Pd and NiPd nanoparticles for H2 sensing at room temperature

Highly Sensitive Ball Surface Acoustic Wave Hydrogen Sensor with Porous Pd-Alloy Film

Dendrimers as Chemical Sensors

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