Mechanism and Application of Carbon Nanotube Sensors in SF6 Decomposed Production Detection: a Review

Zhang, Xiaoxing; Cui, Hao; Gui, Yingang; Tang, Ju

doi:10.1186/s11671-017-1945-8

Cited by 87 publications

(40 citation statements)

References 63 publications

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“…Morphologies (own artwork) of different CNT solids from single CNTs via CNT bundles (or ropes, fibers, yarns) to CNT networks and thin films in a homologue series of their increasingly complex order: top view (upper row), cross section (center row), and estimated prevalence of intrinsic versus extrinsic sensor effects (lower row). Cross sections and respective terminology according to Zhang et al, Tsareva et al ., and Muris et al…”

Section: Cnt Strain Sensor Technologymentioning

confidence: 99%

Carbon Nanotubes for Mechanical Sensor Applications

Wagner

Blaudeck

Meszmer

et al. 2019

Physica Status Solidi (a)

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Herein, the evolution of carbon nanotubes (CNTs) as functional material in nano‐ and microelectromechanical systems (N/MEMS) is featured. Introducing material morphologies for the CNTs in a homologue series (single CNTs—bundles, fibers, yarns—networks and thin films), different concepts for mechanical sensors based on the intrinsic and extrinsic properties of the CNT materials are introduced (piezoresistive effect, strain‐induced band bending, charge tunneling). In a rigorous theoretical treatment, the limits of the achievable sensor performance (i.e., gauge factor) are derived and discussed in the context of applications. A careful literature survey shows that highest sensitivity is reached for devices exploiting the intrinsic transport properties of single CNTs. For reliability tests of such sensor systems made from nanomaterials and classical MEMS, the specimen‐centered approach (SCA) is introduced to give viable insights into the structure property relationships and failure modes of CNT mechanical sensors. CNT actuation occurs on the macro‐, micro‐, and nanoscales via atomic force microscopy, electrostatic gating, integration in N/MEMS systems, or through substrate bending.

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Section: Cnt Strain Sensor Technologymentioning

confidence: 99%

Carbon Nanotubes for Mechanical Sensor Applications

Wagner

Blaudeck

Meszmer

et al. 2019

Physica Status Solidi (a)

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“…Appreciable responses have been observed using field emitter transistor (FET) gas sensors based on CNTs for detecting NO 2 and NH 3 , carbon monoxide (CO), H 2 S, and volatile organic compounds such as ethanol and methanol [19][20][21]. The functionalization of CNTs by metal nanoparticles, metal oxides (MOXs), and different polymers proved to cause an appreciable variation in the electronics properties and to enhance the selectivity and gas sensitivity [13,[22][23][24]. Hybrid CNTs-metal oxides-based gas sensors typically show impressive and superior performance with respect to the pristine material, showing a significant reduction of the sensors' working temperature [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Detection of NO2 by Au and TiO2 Nanoparticles Decorated SWCNTs Sensors

Fort

Panzardi

Al‐Hamry

et al. 2019

Sensors

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The aim of this work is to investigate the gas sensing performance of single wall carbon nanotubes (SWCNTs)-based conductive sensors operating at low-medium temperatures (<250 • C). The investigated sensing films consists of an SWCNT network obtained by drop-casting a SWCNT suspension. Starting from this base preparation, different sensing devices were obtained by decorating the SWCNT network with materials suitable for enhancing the sensitivity toward the target gas. In particular, in this paper, nano-particles of gold and of TiO 2 were used. In the paper, the performance of the different sensing devices, in terms of response time, sensitivity toward NO 2 and cross-sensitivity to O 2 , CO and water vapor, were assessed and discussed. Sensors based on decorated SWCNT films showed high performance; in particular, the decoration with Au nano-particles allows for a large enhancement of sensitivity (reaching 10%/1 ppm at 240 • C) and a large reduction of response time. On the other hand, the addition of TiO 2 nanoparticles leads to a satisfactory improvement of the sensitivity as well as a significant reduction of the response time at moderate temperatures (down to 200 • C). Finally, the suitability of using Au decorated SWCNTs-based sensors for room temperature sensing is demonstrated.

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“…It is widely applied in gas-insulated switchgear (GIS) of power system as electrical insulator as well as arc-quenching medium (Beroual and Haddad, 2017; Zhang X. et al, 2017). However, partial discharge and disruptive discharge might occur in GIS equipment during the long run, accounting for the SF 6 gas decomposing to various decomposition components, such as H 2 S, SO 2 , SOF 2 , SO 2 F 2 (Tsai, 2007; Liu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Electrospun ZnO–SnO2 Composite Nanofibers and Enhanced Sensing Properties to SF6 Decomposition Byproduct H2S

Zhou

Wang

et al. 2018

Front. Chem.

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Hydrogen sulfide (H2S) is an important decomposition component of sulfur hexafluoride (SF6), which has been extensively used in gas-insulated switchgear (GIS) power equipment as insulating and arc-quenching medium. In this work, electrospun ZnO-SnO2 composite nanofibers as a promising sensing material for SF6 decomposition component H2S were proposed and prepared. The crystal structure and morphology of the electrospun ZnO-SnO2 samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The composition of the sensitive materials was analyzed by energy dispersive X-ray spectrometers (EDS) and X-ray photoelectron spectroscopy (XPS). Side heated sensors were fabricated with the electrospun ZnO-SnO2 nanofibers and the gas sensing behaviors to H2S gas were systematically investigated. The proposed ZnO–SnO2 composite nanofibers sensor showed lower optimal operating temperature, enhanced sensing response, quick response/recovery time and good long-term stability against H2S. The measured optimal operating temperature of the ZnO–SnO2 nanofibers sensor to 50 ppm H2S gas was about 250°C with a response of 66.23, which was 6 times larger than pure SnO2 nanofibers sensor. The detection limit of the fabricated ZnO–SnO2 nanofibers sensor toward H2S gas can be as low as 0.5 ppm. Finally, a plausible sensing mechanism for the proposed ZnO–SnO2 composite nanofibers sensor to H2S was also discussed.

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Mechanism and Application of Carbon Nanotube Sensors in SF6 Decomposed Production Detection: a Review

Cited by 87 publications

References 63 publications

Carbon Nanotubes for Mechanical Sensor Applications

Carbon Nanotubes for Mechanical Sensor Applications

Highly Sensitive Detection of NO2 by Au and TiO2 Nanoparticles Decorated SWCNTs Sensors

Electrospun ZnO–SnO2 Composite Nanofibers and Enhanced Sensing Properties to SF6 Decomposition Byproduct H2S

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