Application of dielectrophoresis to fabrication of carbon nanohorn gas sensor

Junya Suehiro, Noriaki Sano, Guangbin Zhou, Hiroshi Imakiire, Kiminobu Imasaka, Masanori Hara

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

This paper describes an electrokinetic fabrication method for a gas sensor composed of single-wall carbon nanohorns (SWCNHs) using dielectrophoresis (DEP). The authors have previously demonstrated that DEP manipulation of carbon nanotubes (CNTs) can be applied to the fabrication of a CNT gas sensor. In the present study, we further explored the possibility of electrokinetic manipulation of SWCNHs. The latter have different structures and properties compared to CNTs. The SWCNHs were synthesized using the 'arc in water with gas injection' method. The SWCNH aggregates were dispersed in ethanol and trapped in an interdigitated microelectrode gap under the action of positive DEP. After the DEP process, the ethanol was evaporated and the microelectrode retaining the SWCNHs was exposed to nitrogen dioxide (NO2) or ammonia (NH3) gas while the electrode impedance was monitored. It was found that conductance of the DEP-fabricated SWCNH sensor increased or decreased upon exposure to ppm-levels of NO2 or NH3, respectively. These results were similar to those previously obtained for CNT gas sensors and suggest that the SWCNH aggregate behaves as a p-type semiconductor. The comparison reveals that intrinsic NO2 sensitivity of the SWCNHs is lower than that of single-wall CNTs (SWCNTs) but comparable with the intrinsic sensitivity of multiple-wall CNTs (MWCNTs).

Original languageEnglish
Pages (from-to)408-415
Number of pages8
JournalJournal of Electrostatics
Volume64
Issue number6
DOIs
Publication statusPublished - Jun 1 2006

Fingerprint

Nanohorns
Electrophoresis
Chemical sensors
Carbon Nanotubes
Carbon
Gases
Fabrication
Carbon nanotubes
fabrication
carbon
sensors
gases
carbon nanotubes
Microelectrodes
electrokinetics
Ethanol
manipulators
Nitrogen Dioxide
ethyl alcohol
Semiconductors

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

Cite this

Application of dielectrophoresis to fabrication of carbon nanohorn gas sensor. / Suehiro, Junya; Sano, Noriaki; Zhou, Guangbin; Imakiire, Hiroshi; Imasaka, Kiminobu; Hara, Masanori.

In: Journal of Electrostatics, Vol. 64, No. 6, 01.06.2006, p. 408-415.

Research output: Contribution to journalArticle

Suehiro, Junya ; Sano, Noriaki ; Zhou, Guangbin ; Imakiire, Hiroshi ; Imasaka, Kiminobu ; Hara, Masanori. / Application of dielectrophoresis to fabrication of carbon nanohorn gas sensor. In: Journal of Electrostatics. 2006 ; Vol. 64, No. 6. pp. 408-415.
@article{888fdbece0554bc890e749f9d33d236b,
title = "Application of dielectrophoresis to fabrication of carbon nanohorn gas sensor",
abstract = "This paper describes an electrokinetic fabrication method for a gas sensor composed of single-wall carbon nanohorns (SWCNHs) using dielectrophoresis (DEP). The authors have previously demonstrated that DEP manipulation of carbon nanotubes (CNTs) can be applied to the fabrication of a CNT gas sensor. In the present study, we further explored the possibility of electrokinetic manipulation of SWCNHs. The latter have different structures and properties compared to CNTs. The SWCNHs were synthesized using the 'arc in water with gas injection' method. The SWCNH aggregates were dispersed in ethanol and trapped in an interdigitated microelectrode gap under the action of positive DEP. After the DEP process, the ethanol was evaporated and the microelectrode retaining the SWCNHs was exposed to nitrogen dioxide (NO2) or ammonia (NH3) gas while the electrode impedance was monitored. It was found that conductance of the DEP-fabricated SWCNH sensor increased or decreased upon exposure to ppm-levels of NO2 or NH3, respectively. These results were similar to those previously obtained for CNT gas sensors and suggest that the SWCNH aggregate behaves as a p-type semiconductor. The comparison reveals that intrinsic NO2 sensitivity of the SWCNHs is lower than that of single-wall CNTs (SWCNTs) but comparable with the intrinsic sensitivity of multiple-wall CNTs (MWCNTs).",
author = "Junya Suehiro and Noriaki Sano and Guangbin Zhou and Hiroshi Imakiire and Kiminobu Imasaka and Masanori Hara",
year = "2006",
month = "6",
day = "1",
doi = "10.1016/j.elstat.2005.11.001",
language = "English",
volume = "64",
pages = "408--415",
journal = "Journal of Electrostatics",
issn = "0304-3886",
publisher = "Elsevier",
number = "6",

}

TY - JOUR

T1 - Application of dielectrophoresis to fabrication of carbon nanohorn gas sensor

AU - Suehiro, Junya

AU - Sano, Noriaki

AU - Zhou, Guangbin

AU - Imakiire, Hiroshi

AU - Imasaka, Kiminobu

AU - Hara, Masanori

PY - 2006/6/1

Y1 - 2006/6/1

N2 - This paper describes an electrokinetic fabrication method for a gas sensor composed of single-wall carbon nanohorns (SWCNHs) using dielectrophoresis (DEP). The authors have previously demonstrated that DEP manipulation of carbon nanotubes (CNTs) can be applied to the fabrication of a CNT gas sensor. In the present study, we further explored the possibility of electrokinetic manipulation of SWCNHs. The latter have different structures and properties compared to CNTs. The SWCNHs were synthesized using the 'arc in water with gas injection' method. The SWCNH aggregates were dispersed in ethanol and trapped in an interdigitated microelectrode gap under the action of positive DEP. After the DEP process, the ethanol was evaporated and the microelectrode retaining the SWCNHs was exposed to nitrogen dioxide (NO2) or ammonia (NH3) gas while the electrode impedance was monitored. It was found that conductance of the DEP-fabricated SWCNH sensor increased or decreased upon exposure to ppm-levels of NO2 or NH3, respectively. These results were similar to those previously obtained for CNT gas sensors and suggest that the SWCNH aggregate behaves as a p-type semiconductor. The comparison reveals that intrinsic NO2 sensitivity of the SWCNHs is lower than that of single-wall CNTs (SWCNTs) but comparable with the intrinsic sensitivity of multiple-wall CNTs (MWCNTs).

AB - This paper describes an electrokinetic fabrication method for a gas sensor composed of single-wall carbon nanohorns (SWCNHs) using dielectrophoresis (DEP). The authors have previously demonstrated that DEP manipulation of carbon nanotubes (CNTs) can be applied to the fabrication of a CNT gas sensor. In the present study, we further explored the possibility of electrokinetic manipulation of SWCNHs. The latter have different structures and properties compared to CNTs. The SWCNHs were synthesized using the 'arc in water with gas injection' method. The SWCNH aggregates were dispersed in ethanol and trapped in an interdigitated microelectrode gap under the action of positive DEP. After the DEP process, the ethanol was evaporated and the microelectrode retaining the SWCNHs was exposed to nitrogen dioxide (NO2) or ammonia (NH3) gas while the electrode impedance was monitored. It was found that conductance of the DEP-fabricated SWCNH sensor increased or decreased upon exposure to ppm-levels of NO2 or NH3, respectively. These results were similar to those previously obtained for CNT gas sensors and suggest that the SWCNH aggregate behaves as a p-type semiconductor. The comparison reveals that intrinsic NO2 sensitivity of the SWCNHs is lower than that of single-wall CNTs (SWCNTs) but comparable with the intrinsic sensitivity of multiple-wall CNTs (MWCNTs).

UR - http://www.scopus.com/inward/record.url?scp=33645998085&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645998085&partnerID=8YFLogxK

U2 - 10.1016/j.elstat.2005.11.001

DO - 10.1016/j.elstat.2005.11.001

M3 - Article

AN - SCOPUS:33645998085

VL - 64

SP - 408

EP - 415

JO - Journal of Electrostatics

JF - Journal of Electrostatics

SN - 0304-3886

IS - 6

ER -