Surface Sensitivity of Ultrasonically Treated Carbon Nanotube Network towards Ammonia

Petro Lutsyk, Prabakaran Shankar, Oleksiy Rozhin, Sergei A. Kulinich

Research output: Contribution to journalLetter

Abstract

Detection of ammonia by carbon nanotubes is an extensively studied area where tremendous progress was achieved so far in their sensing performance. In this paper, we focused on carbon nanotube network sensors of NH 3 aiming to develop better understanding of their gas detection behavior and improved sensing response. Our experiments showed improved sensing performance for single-walled carbon nanotubes of (6,5) chirality ultrasonically treated at high power and then forming bundled nanotube network upon thermal annealing. Two chemiresistive sensing pathways were observed for such networks resulting in increased and decreased resistance in presence of different ammonia concentrations from 10 2 to 10 4 ppm. This multidirectional chemiresistive response was comprehensively explained via various phenomena, such as partial and full neutralization of p-type conductivity of the nanotubes, change of the Schottky barrier, and dipoles at the interface between nanotubes and gold electrodes. The proposed sensing mechanisms are believed to provide strong support for further development of ammonia sensors with optimized performance.
Original languageEnglish
Article number100363
JournalSurfaces and Interfaces
Volume17
Early online date22 Jul 2019
DOIs
Publication statusPublished - 1 Dec 2019

Fingerprint

Carbon Nanotubes
Ammonia
Nanotubes
ammonia
Carbon nanotubes
carbon nanotubes
Chirality
nanotubes
Single-walled carbon nanotubes (SWCN)
Gold
Sensor networks
Gases
Annealing
Electrodes
Sensors
sensors
chirality
Experiments
gold
dipoles

Bibliographical note

© 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • Ammonia
  • Bundled nanotube networks
  • Carbon nanotubes
  • Sensing

Cite this

Lutsyk, Petro ; Shankar, Prabakaran ; Rozhin, Oleksiy ; Kulinich, Sergei A. / Surface Sensitivity of Ultrasonically Treated Carbon Nanotube Network towards Ammonia. In: Surfaces and Interfaces. 2019 ; Vol. 17.
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abstract = "Detection of ammonia by carbon nanotubes is an extensively studied area where tremendous progress was achieved so far in their sensing performance. In this paper, we focused on carbon nanotube network sensors of NH 3 aiming to develop better understanding of their gas detection behavior and improved sensing response. Our experiments showed improved sensing performance for single-walled carbon nanotubes of (6,5) chirality ultrasonically treated at high power and then forming bundled nanotube network upon thermal annealing. Two chemiresistive sensing pathways were observed for such networks resulting in increased and decreased resistance in presence of different ammonia concentrations from 10 2 to 10 4 ppm. This multidirectional chemiresistive response was comprehensively explained via various phenomena, such as partial and full neutralization of p-type conductivity of the nanotubes, change of the Schottky barrier, and dipoles at the interface between nanotubes and gold electrodes. The proposed sensing mechanisms are believed to provide strong support for further development of ammonia sensors with optimized performance.",
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Surface Sensitivity of Ultrasonically Treated Carbon Nanotube Network towards Ammonia. / Lutsyk, Petro; Shankar, Prabakaran; Rozhin, Oleksiy; Kulinich, Sergei A.

In: Surfaces and Interfaces, Vol. 17, 100363, 01.12.2019.

Research output: Contribution to journalLetter

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T1 - Surface Sensitivity of Ultrasonically Treated Carbon Nanotube Network towards Ammonia

AU - Lutsyk, Petro

AU - Shankar, Prabakaran

AU - Rozhin, Oleksiy

AU - Kulinich, Sergei A.

N1 - © 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

PY - 2019/12/1

Y1 - 2019/12/1

N2 - Detection of ammonia by carbon nanotubes is an extensively studied area where tremendous progress was achieved so far in their sensing performance. In this paper, we focused on carbon nanotube network sensors of NH 3 aiming to develop better understanding of their gas detection behavior and improved sensing response. Our experiments showed improved sensing performance for single-walled carbon nanotubes of (6,5) chirality ultrasonically treated at high power and then forming bundled nanotube network upon thermal annealing. Two chemiresistive sensing pathways were observed for such networks resulting in increased and decreased resistance in presence of different ammonia concentrations from 10 2 to 10 4 ppm. This multidirectional chemiresistive response was comprehensively explained via various phenomena, such as partial and full neutralization of p-type conductivity of the nanotubes, change of the Schottky barrier, and dipoles at the interface between nanotubes and gold electrodes. The proposed sensing mechanisms are believed to provide strong support for further development of ammonia sensors with optimized performance.

AB - Detection of ammonia by carbon nanotubes is an extensively studied area where tremendous progress was achieved so far in their sensing performance. In this paper, we focused on carbon nanotube network sensors of NH 3 aiming to develop better understanding of their gas detection behavior and improved sensing response. Our experiments showed improved sensing performance for single-walled carbon nanotubes of (6,5) chirality ultrasonically treated at high power and then forming bundled nanotube network upon thermal annealing. Two chemiresistive sensing pathways were observed for such networks resulting in increased and decreased resistance in presence of different ammonia concentrations from 10 2 to 10 4 ppm. This multidirectional chemiresistive response was comprehensively explained via various phenomena, such as partial and full neutralization of p-type conductivity of the nanotubes, change of the Schottky barrier, and dipoles at the interface between nanotubes and gold electrodes. The proposed sensing mechanisms are believed to provide strong support for further development of ammonia sensors with optimized performance.

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