SpringerOpen Newsletter

Receive periodic news and updates relating to SpringerOpen.

Open Access Nano Express

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

Seiji Takeda1*, Motonori Nakamura1, Atsushi Ishii1, Agus Subagyo2, Hirotaka Hosoi1, Kazuhisa Sueoka2 and Koichi Mukasa1

Author Affiliations

1 Creative Research Initiative “Sousei”, Hokkaido University, Sapporo, 001-0021, Japan

2 Graduate School of Information Science and Technology, Hokkaido University, Sapporo, 060-0814, Japan

For all author emails, please log on.

Nanoscale Research Letters 2007, 2:207-212  doi:10.1007/s11671-007-9053-9

The electronic version of this article is the complete one and can be found online at:


Received:28 December 2006
Accepted:5 March 2007
Published:30 March 2007

© 2007 to the authors

Abstract

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.

Keywords:
Carbon nanotube; Field effect transistor; pH; Glass; Immobilization

Nano Express

[1-15]

Acknowledgements

This work was supported by the Japan Securities Scholarship Foundation, the Technology and New Energy and Industrial Technology Development Organization (NEDO), and Special Coordination Funds for Promoting Science.

References

  1. Cui Y, Wei Q, Park H, Lieber CM:

    Science. 2001, 293:1289.

    COI number [1:CAS:528:DC%2BD3MXmtFCrtrs%3D]; Bibcode number [2001Sci...293.1289C]

    PubMed Abstract | Publisher Full Text OpenURL

  2. Patolsky F, Zheng G, Hayden O, Lakadamyali M, Zhuang X, Lieber CM:

    Proc. Natl. Acad. Sci. USA.. 2004, 101:14017.

    COI number [1:CAS:528:DC%2BD2cXosVylsro%3D]; Bibcode number [2004PNAS..10114017P]

    PubMed Abstract | Publisher Full Text | PubMed Central Full Text OpenURL

  3. Staii C, Johnson J, Alan T:

    Nano Lett.. 2005, 5:1774.

    COI number [1:CAS:528:DC%2BD2MXosVGgsbw%3D]

    PubMed Abstract | Publisher Full Text OpenURL

  4. Chen RJ, Choi HC, Bangsaruntip S, Yenilmez E, Tang X, Wang Q, Chang Y-L, Dai H:

    J. Am. Chem. Soc. 2004, 126:1563.

    COI number [1:CAS:528:DC%2BD2cXksFCitA%3D%3D]

    PubMed Abstract | Publisher Full Text OpenURL

  5. Takeda S, Sbagyo A, Sakoda Y, Ishii A, Sawamura M, Sueoka K, Kida H, Mukasa K, Matsumoto K:

    Biosens. Bioelectron. 2005, 21:201.

    COI number [1:CAS:528:DC%2BD2MXlsVClt74%3D]

    PubMed Abstract | Publisher Full Text OpenURL

  6. Kong J, Franklin NR, Zhou C, Chapline MG, Peng S, Cho K, Dai H:

    Science. 2000, 287:622.

    COI number [1:CAS:528:DC%2BD3cXovVWgtA%3D%3D]; Bibcode number [2000Sci...287..622K]

    PubMed Abstract | Publisher Full Text OpenURL

  7. Wang J:

    Analyst. 2005, 130:421.

    COI number [1:CAS:528:DC%2BD2MXitlOlt78%3D]; Bibcode number [2005rems.book.....W]

    PubMed Abstract | Publisher Full Text OpenURL

  8. Modi A, Koratkar N, Lass E, Wei B, Ajayan PM:

    Nature. 2003, 424:171.

    COI number [1:CAS:528:DC%2BD3sXlt1CktLc%3D]; Bibcode number [2003Natur.424..171M]

    PubMed Abstract | Publisher Full Text OpenURL

  9. Yu Q, Qin G, Li H, Xia Z, Nian Y, Pei S-S:

    J. Phys. Chem. B. 2006, 110:22676.

    COI number [1:CAS:528:DC%2BD28XhtFSit7bJ]

    PubMed Abstract | Publisher Full Text OpenURL

  10. Zhu J, Yudasaka M, Zhang M, Kasuya D, Iijima S:

    Nano Lett. 2003, 3:1239.

    COI number [1:CAS:528:DC%2BD3sXms1Cjs7g%3D]

    Publisher Full Text OpenURL

  11. Choi KH, Bourgoin JP, Auvray S, Esteve D, Duesberg GS, Roth S, Burgharm M:

    Surf. Sci.. 2000, 462:195.

    COI number [1:CAS:528:DC%2BD3cXls1Wmtrg%3D]

    Publisher Full Text OpenURL

  12. Auvray SP, Derycke V, Goffman M, Filoramo A, Jost O, Bourgoin J-P:

    Nano Lett. 2005, 5:451.

    COI number [1:CAS:528:DC%2BD2MXhtFSntrc%3D]

    PubMed Abstract | Publisher Full Text OpenURL

  13. Lee M, Im J, Myung S, Kang J, Huang L, Kwon Y-K, Hong S:

    Nature Nanotechnology. 2006, 1:67. Publisher Full Text OpenURL

  14. Jhi S-H, Louie SG, Cohen ML:

    Phys. Rev. Lett. 2000, 85:1710.

    COI number [1:CAS:528:DC%2BD3cXlslGntLg%3D]; Bibcode number [2000PhRvL..85.1710J]

    PubMed Abstract | Publisher Full Text OpenURL

  15. Shim M, Javey A, Kam NWS, Dai H:

    J. Am. Chem. Soc. 2001, 123:11512.

    COI number [1:CAS:528:DC%2BD3MXnvVGnurk%3D]

    PubMed Abstract | Publisher Full Text OpenURL