Spray deposited carbon nanotubes for organic vapor sensors

Pascali, G. De; Melisi, D.; Valentini, M.; Valentini, A.; Nitti, Maria Angela; Nasi, Roberto; Casamassima, G.; Ambrico, P F; Cardone, Antonio

doi:10.1016/j.mejo.2014.09.007

Cited by 8 publications

(3 citation statements)

References 10 publications

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“…In a previous study, many electrical measurements were carried out in manually CNT-doped adhesive films to prove the viability of the technology. In this study, the addition of CNTs to an adhesive film is carried out by spraying an aqueous dispersion of CNTs over the surface as it has been proved an effective way of CNT deposition onto thin films. , In this regard, CNT dispersion, which is a critical factor for sensing capabilities, is controlled by the addition of a surfactant (sodium dodecyl sulfate, SDS) which improves the dispersion state of CNTs. − In addition, SDS content was previously optimized to get the highest electrical and mechanical properties of the joint.…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube-Doped Adhesive Films for Detecting Crack Propagation on Bonded Joints: A Deeper Understanding of Anomalous Behaviors

Sánchez–Romate

Molinero

Jiménez‐Suárez

et al. 2017

ACS Appl. Mater. Interfaces

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A novel nanoreinforced adhesive film has been developed to detect adhesive deformation and crack propagation along the bonding line by means of the electrical response of the material. Adhesive films were doped by spraying an aqueous dispersion of carbon nanotubes (CNTs) over the surface. To determine the sensitivity of bonded joints, single lap shear (SLS) and mode-I fracture energy tests have been carried out while their electrical response has been measured. It has been found that CNT-doped adhesive films are able to detect adhesive deformation and final failure for SLS specimens and crack initiation and propagation along the bonding line for mode-I specimens with a high sensitivity. Sudden increases on electrical resistance are correlated to a rapid growing of the crack length due to instability on crack propagation in a tick-slip case, whereas specimens with a more uniform crack propagation are linked to a steadier increase on electrical resistance, and both of them are properly correlated to the mechanical response. By analyzing more in detail the electrical response and comparing with theoretical approaches, the stick-slip behavior is associated with the presence of porosity and lack of adhesives because of possible manufacturing issues such as adhesive overflowing. These statements are also validated by microstructural analysis. Therefore, the potential and applicability of the proposed adhesive films for evaluating the structural integrity has been demonstrated.

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Section: Introductionmentioning

confidence: 99%

Carbon Nanotube-Doped Adhesive Films for Detecting Crack Propagation on Bonded Joints: A Deeper Understanding of Anomalous Behaviors

Sánchez–Romate

Molinero

Jiménez‐Suárez

et al. 2017

ACS Appl. Mater. Interfaces

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“…Then, it is impregnated by the precursor vapor. A well-known approach for integrating MWCNTs in gas sensing applications consists in depositing the MWCNTs over a resistive substrate with interdigitated electrodes conforming a chemiresistive sensor (CHRs) and measure its electrical resistance change in the presence of a gas [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Vapor-phase impregnation decomposition technique as an alternativeto decorate MWCNTs withPt and PdNPs for ammonia gas detection

Capula-Colindres

Torres-Santillan

Aguir

et al. 2021

Colloid and Interface Science Communications

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“…Many research groups use SWNTs for NO x [3] , Organic vapor [4] , O 3 [5] detection and MWNTs for SF 6 [6] , CO [7] , H 2 S [8,9] , H 2 [10,11] , VOC [12] detection. The recovery time of SWNTs gas sensors are actually long, although the majority of their performances are better than the traditional ones.…”

Section: Introductionmentioning

confidence: 99%

The gas sensing performances of gas sensors based on the dielectrophoretically manipulated multi-wall carbon nanotubes with various functionalized groups towards NH3

Wang

Feng

2015

Proceedings of the 4th International Conference on Information Technology and Management Innovation

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Gas sensors based on raw multi-wall carbon nanotubes (raw MWNTs) and functionalized multi-wall carbon nanotubes (MWNTs-x) were fabricated on the chromium-silver-gold microelectrode chips by dielectrophoresis process. The positive dielectrophoresis was observed for the particles of carbon nanotubes. The gas sensing performances of the fabricated gas sensors towards different concentrations of NH 3 were tested at room temperature. It was found that the response time, recovery time and sensitivity of gas sensors towards NH 3 were increased with the increase of NH 3 concentrations. We demonstrated that functionalizing MWNTs does not change the adsorption properties of NH 3 on MWNTs. In addition, We conclude that the interactions between MWNTs and NH 3 such as surface area and small diameter are influential factors for the gas sensing performances of these gas sensors.

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Spray deposited carbon nanotubes for organic vapor sensors

Cited by 8 publications

References 10 publications

Carbon Nanotube-Doped Adhesive Films for Detecting Crack Propagation on Bonded Joints: A Deeper Understanding of Anomalous Behaviors

Carbon Nanotube-Doped Adhesive Films for Detecting Crack Propagation on Bonded Joints: A Deeper Understanding of Anomalous Behaviors

Vapor-phase impregnation decomposition technique as an alternativeto decorate MWCNTs withPt and PdNPs for ammonia gas detection

The gas sensing performances of gas sensors based on the dielectrophoretically manipulated multi-wall carbon nanotubes with various functionalized groups towards NH3

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