Room temperature hydrogen gas sensor nanocomposite based on Pd-decorated multi-walled carbon nanotubes thin films

Zilli, D.; Bonelli, Pablo Ricardo; Cukierman, Ana Lea

doi:10.1016/j.snb.2011.03.045

Cited by 55 publications

(37 citation statements)

References 26 publications

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“…Consistently, the amounts of acetylene near the sensor were varied from 5,000 ppm, for 2 sccm nominal concentration to 25,000 ppm for 10 sccm. The electrical resistance of the chips was recorded as a function of time and later the data was transformed to ‘sensitivity’ defined as the variation of resistance due to the gas mixture (Δ R = R i - R 0 ) normalized by the resistance of the baseline ( R 0 , pure Ar in this case) in percentage, S (%) [58]. The resulting data of this experiment is presented in Figure 10.…”

Section: Resultsmentioning

confidence: 99%

Gold nanoparticles grown inside carbon nanotubes: synthesis and electrical transport measurements

et al. 2014

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The hybrid structures composed of gold nanoparticles and carbon nanotubes were prepared using porous alumina membranes as templates. Carbon nanotubes were synthesized inside the pores of these templates by the non-catalytic decomposition of acetylene. The inner cavity of the supported tubes was used as nanoreactors to grow gold particles by impregnation with a gold salt, followed by a calcination-reduction process. The samples were characterized by transmission electron microscopy and X-ray energy dispersion spectroscopy techniques. The resulting hybrid products are mainly encapsulated gold nanoparticles with different shapes and dimensions depending on the concentration of the gold precursor and the impregnation procedure. In order to understand the electronic transport mechanisms in these nanostructures, their conductance was measured as a function of temperature. The samples exhibit a ‘non-metallic’ temperature dependence where the dominant electron transport mechanism is 1D hopping. Depending on the impregnation procedure, the inclusion of gold nanoparticles inside the CNTs can introduce significant changes in the structure of the tubes and the mechanisms for electronic transport. The electrical resistance of these hybrid structures was monitored under different gas atmospheres at ambient pressure. Using this hybrid nanostructures, small amounts of acetylene and hydrogen were detected with an increased sensibility compared with pristine carbon nanotubes. Although the sensitivity of these hybrid nanostructures is rather low compared to alternative sensing elements, their response is remarkably fast under changing gas atmospheres.

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Section: Resultsmentioning

confidence: 99%

Gold nanoparticles grown inside carbon nanotubes: synthesis and electrical transport measurements

et al. 2014

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“…The present work aims at enhancing the electrical response, response time, and recovery for In 2 O 3 -doped SnO 2 sensor in high humid condition by coating the sensor with three different types of polymer. The novelty of the approach lies in modifying the sensor surface for selective sensing of hydrogen in humid environment without mandating any change in the sensor architecture [132].…”

Section: Detection and Quantificationmentioning

confidence: 99%

“…Zilli et al [132] have shown that the nanocomposite films prepared with the Pd-decorated oxidized multi-wall carbon nanotubes (MWCNTs) have potentialities for their use as room temperature H 2 sensor devices.…”

Section: Detection and Quantificationmentioning

confidence: 99%

A review on production, storage of hydrogen and its utilization as an energy resource

Dutta

2014

Journal of Industrial and Engineering Chemistry

664

188

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“…The response of sensors is characterized as the percentage of the resistance change due to the exposure to a gas containing H 2 S against the resistance measured without the presence of sulfuretted hydrogen, expressed as [67]

S = \frac{R - R_{0}}{R_{0}} \times 100 %

where R represents the real-time resistance of the sensors immersed in H 2 S, and R 0 represents resistance measured in the initial vacuum environment. In this study, three concentrations, namely 300 ppm, 50 ppm, and 100 ppm, of H 2 S were detected to obtain the sensitivity–time curves for further analysis, expressed in Figure 6.…”

Section: Application Of Graphene-based Sensorsmentioning

confidence: 99%

Synthesis of Graphene-Based Sensors and Application on Detecting SF6 Decomposing Products: A Review

Zhang

Cui

Gui

2017

Sensors

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Graphene-based materials have aroused enormous focus on a wide range of engineering fields because of their unique structure. One of the most promising applications is gas adsorption and sensing. In electrical engineering, graphene-based sensors are also employed as detecting devices to estimate the operation status of gas insulated switchgear (GIS). This paper reviews the main synthesis methods of graphene, gas adsorption, and sensing mechanism of its based sensors, as well as their applications in detecting SF6 decomposing products, such as SO2, H2S, SO2F2, and SOF2, in GIS. Both theoretical and experimental researches on gas response of graphene-based sensors to these typical gases are summarized. Finally, the future research trend about graphene synthesis technique and relevant perspective are also given.

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Room temperature hydrogen gas sensor nanocomposite based on Pd-decorated multi-walled carbon nanotubes thin films

Cited by 55 publications

References 26 publications

Gold nanoparticles grown inside carbon nanotubes: synthesis and electrical transport measurements

Gold nanoparticles grown inside carbon nanotubes: synthesis and electrical transport measurements

A review on production, storage of hydrogen and its utilization as an energy resource

Synthesis of Graphene-Based Sensors and Application on Detecting SF6 Decomposing Products: A Review

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