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A pH sensor based on electric properties of nanotubes on a glass substrate
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 dr...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer
2007
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3246224/ https://www.ncbi.nlm.nih.gov/pubmed/21806848 http://dx.doi.org/10.1007/s11671-007-9053-9 |
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author | Takeda, Seiji Nakamura, Motonori Ishii, Atsushi Subagyo, Agus Hosoi, Hirotaka Sueoka, Kazuhisa Mukasa, Koichi |
author_facet | Takeda, Seiji Nakamura, Motonori Ishii, Atsushi Subagyo, Agus Hosoi, Hirotaka Sueoka, Kazuhisa Mukasa, Koichi |
author_sort | Takeda, Seiji |
collection | PubMed |
description | 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 ann-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 thep-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. |
format | Online Article Text |
id | pubmed-3246224 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2007 |
publisher | Springer |
record_format | MEDLINE/PubMed |
spelling | pubmed-32462242011-12-29 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 Nanoscale Res Lett Nano Express 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 ann-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 thep-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. Springer 2007-03-30 /pmc/articles/PMC3246224/ /pubmed/21806848 http://dx.doi.org/10.1007/s11671-007-9053-9 Text en Copyright ©2007 to the authors |
spellingShingle | Nano Express Takeda, Seiji Nakamura, Motonori Ishii, Atsushi Subagyo, Agus Hosoi, Hirotaka Sueoka, Kazuhisa Mukasa, Koichi A pH sensor based on electric properties of nanotubes on a glass substrate |
title | A pH sensor based on electric properties of nanotubes on a glass substrate |
title_full | A pH sensor based on electric properties of nanotubes on a glass substrate |
title_fullStr | A pH sensor based on electric properties of nanotubes on a glass substrate |
title_full_unstemmed | A pH sensor based on electric properties of nanotubes on a glass substrate |
title_short | A pH sensor based on electric properties of nanotubes on a glass substrate |
title_sort | ph sensor based on electric properties of nanotubes on a glass substrate |
topic | Nano Express |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3246224/ https://www.ncbi.nlm.nih.gov/pubmed/21806848 http://dx.doi.org/10.1007/s11671-007-9053-9 |
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