A pH sensor based on electric properties of nanotubes on a glass substrate

• Takeda, Seiji

• Nakamura, Motonori

• Ishii, Atsushi

• Subagyo, Agus

• Hosoi, Hirotaka

• Sueoka, Kazuhisa

• Mukasa, Koichi

抄録

We fabricated a pH-sensitive device on a glass substrate based on properties of carbon nanotubes. Nanotubes were immobilized specifically on chemically modified areas on a substrate followed by deposition of metallic source and drain electrodes on the area. Some nanotubes connected the source and drain electrodes. A top gate electrode was fabricated on an insulating layer of silane coupling agent on the nanotube. The device showed properties of an n-type field effect transistor when a potential was applied to the nanotube from the top gate electrode. Before fabrication of the insulating layer, the device showed that the p-type field effect transistor and the current through the source and drain electrodes depend on the buffer pH. The current increases with decreasing pH of the CNT solution. This device, which can detect pH, is applicable for use as a biosensor through modification of the CNT surface.

収録刊行物

• Nanoscale Research Letters

  Nanoscale Research Letters 2 (4), 207-212, 2007-04

  Springer

キーワード

• carbon nanotube
• field effect transistor
• pH
• glass
• immobilization

詳細情報

• CRID: 1050001338995234176
• NII論文ID: 120000952612
• ISSN: 1556276X
• ISSN: 19317573
• HANDLE: 2115/33770
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles