Gas sensing at the nanoscale: Engineering SWCNT-ITO nano-heterojunctions for the selective detection of NH3 and NO2 target molecules

Federica Rigoni; Giovanni Drera; Stefania Pagliara; E. Perghem; Chiara Pintossi; A. Goldoni; Andrea Goldoni; Luigi Ermenegildo Sangaletti

doi:10.1088/1361-6528/28/3/035502

Gas sensing at the nanoscale: Engineering SWCNT-ITO nano-heterojunctions for the selective detection of NH3 and NO2 target molecules

Federica Rigoni, Giovanni Drera, Stefania Pagliara, E. Perghem, Chiara Pintossi, A. Goldoni, Andrea Goldoni, Luigi Ermenegildo Sangaletti

Sincrotrone Trieste

Risultato della ricerca: Contributo in rivista › Articolo in rivista

11 Citazioni (Scopus)

Abstract

The gas response of single-wall carbon nanotubes (SWCNT) functionalized with indium tin oxide (ITO) nanoparticles (NP) has been studied at room temperature and an enhanced sensitivity to ammonia and nitrogen dioxide is demonstrated. The higher sensitivity in the functionalized sample is related to the creation of nano-heterojunctions at the interface between SWCNT bundles and ITO NP. Furthermore, the different response of the two devices upon NO2 exposure provides a way to enhance also the selectivity. This behavior is rationalized by considering a gas sensing mechanism based on the build-up of space-charge layers at the junctions. Finally, full recovery of the signal after exposure to NO2 is achieved by UV irradiation for the functionalized sample, where the ITO NP can play a role to hinder the poisoning effects on SWCNT due to NO2 chemisorption.

Lingua originale	English
pagine (da-a)	N/A-N/A
Numero di pagine	7
Rivista	Nanotechnology
Volume	28
DOI	https://doi.org/10.1088/1361-6528/28/3/035502
Stato di pubblicazione	Pubblicato - 2017

Keywords

Bioengineering
Chemistry (all)
Electrical and Electronic Engineering
ITO nanoparticles
Materials Science (all)
Mechanical Engineering
Mechanics of Materials
ammonia gas sensing
carbon nanotubes
gas sensing
heterojunction
indium tin oxide nanoparticles
nano-heterojunction

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10.1088/1361-6528/28/3/035502

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title = "Gas sensing at the nanoscale: Engineering SWCNT-ITO nano-heterojunctions for the selective detection of NH3 and NO2 target molecules",

abstract = "The gas response of single-wall carbon nanotubes (SWCNT) functionalized with indium tin oxide (ITO) nanoparticles (NP) has been studied at room temperature and an enhanced sensitivity to ammonia and nitrogen dioxide is demonstrated. The higher sensitivity in the functionalized sample is related to the creation of nano-heterojunctions at the interface between SWCNT bundles and ITO NP. Furthermore, the different response of the two devices upon NO2 exposure provides a way to enhance also the selectivity. This behavior is rationalized by considering a gas sensing mechanism based on the build-up of space-charge layers at the junctions. Finally, full recovery of the signal after exposure to NO2 is achieved by UV irradiation for the functionalized sample, where the ITO NP can play a role to hinder the poisoning effects on SWCNT due to NO2 chemisorption.",

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author = "Federica Rigoni and Giovanni Drera and Stefania Pagliara and E. Perghem and Chiara Pintossi and A. Goldoni and Andrea Goldoni and Sangaletti, {Luigi Ermenegildo}",

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T1 - Gas sensing at the nanoscale: Engineering SWCNT-ITO nano-heterojunctions for the selective detection of NH3 and NO2 target molecules

AU - Rigoni, Federica

AU - Drera, Giovanni

AU - Pagliara, Stefania

AU - Perghem, E.

AU - Pintossi, Chiara

AU - Goldoni, A.

AU - Goldoni, Andrea

AU - Sangaletti, Luigi Ermenegildo

PY - 2017

Y1 - 2017

N2 - The gas response of single-wall carbon nanotubes (SWCNT) functionalized with indium tin oxide (ITO) nanoparticles (NP) has been studied at room temperature and an enhanced sensitivity to ammonia and nitrogen dioxide is demonstrated. The higher sensitivity in the functionalized sample is related to the creation of nano-heterojunctions at the interface between SWCNT bundles and ITO NP. Furthermore, the different response of the two devices upon NO2 exposure provides a way to enhance also the selectivity. This behavior is rationalized by considering a gas sensing mechanism based on the build-up of space-charge layers at the junctions. Finally, full recovery of the signal after exposure to NO2 is achieved by UV irradiation for the functionalized sample, where the ITO NP can play a role to hinder the poisoning effects on SWCNT due to NO2 chemisorption.

AB - The gas response of single-wall carbon nanotubes (SWCNT) functionalized with indium tin oxide (ITO) nanoparticles (NP) has been studied at room temperature and an enhanced sensitivity to ammonia and nitrogen dioxide is demonstrated. The higher sensitivity in the functionalized sample is related to the creation of nano-heterojunctions at the interface between SWCNT bundles and ITO NP. Furthermore, the different response of the two devices upon NO2 exposure provides a way to enhance also the selectivity. This behavior is rationalized by considering a gas sensing mechanism based on the build-up of space-charge layers at the junctions. Finally, full recovery of the signal after exposure to NO2 is achieved by UV irradiation for the functionalized sample, where the ITO NP can play a role to hinder the poisoning effects on SWCNT due to NO2 chemisorption.

KW - Bioengineering

KW - Chemistry (all)

KW - Electrical and Electronic Engineering

KW - ITO nanoparticles

KW - Materials Science (all)

KW - Mechanical Engineering

KW - Mechanics of Materials

KW - ammonia gas sensing

KW - carbon nanotubes

KW - gas sensing

KW - heterojunction

KW - indium tin oxide nanoparticles

KW - nano-heterojunction

KW - Bioengineering

KW - Chemistry (all)

KW - Electrical and Electronic Engineering

KW - ITO nanoparticles

KW - Materials Science (all)

KW - Mechanical Engineering

KW - Mechanics of Materials

KW - ammonia gas sensing

KW - carbon nanotubes

KW - gas sensing

KW - heterojunction

KW - indium tin oxide nanoparticles

KW - nano-heterojunction

UR - http://hdl.handle.net/10807/98142

UR - http://iopscience.iop.org/article/10.1088/1361-6528/28/3/035502/pdf

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DO - 10.1088/1361-6528/28/3/035502

M3 - Article

SN - 0957-4484

VL - 28

SP - N/A-N/A

JO - Nanotechnology

JF - Nanotechnology

ER -

Gas sensing at the nanoscale: Engineering SWCNT-ITO nano-heterojunctions for the selective detection of NH3 and NO2 target molecules

Abstract

Keywords

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