Full Paper

Tuning the Chemical Selectivity of SWNT-FETs for Detection of Heavy-Metal Ions

  1. Erica S. Forzani Prof.1,
  2. Xiulan Li1,
  3. Peiming Zhang Prof.2,
  4. Nongjian Tao Prof.1,
  5. Ruth Zhang Dr.3,
  6. Islamshah Amlani Dr.3,
  7. Raymond Tsui3,
  8. Larry A. Nagahara Dr.3

Article first published online: 25 AUG 2006

DOI: 10.1002/smll.200600185

Issue

Small

Small

Special Issue: Special Section - Assembly at the Nanoscale - Toward Functional Nanostructured Materials

Volume 2, Issue 11, pages 1283–1291, November 2006

Additional Information

How to Cite

Forzani, E., Li, X., Zhang, P., Tao, N., Zhang, R., Amlani, I., Tsui, R. and Nagahara, L. (2006), Tuning the Chemical Selectivity of SWNT-FETs for Detection of Heavy-Metal Ions. Small, 2: 1283–1291. doi: 10.1002/smll.200600185

Author Information

  1. 1

    Center for Solid State Electronics Research and Department of Electrical Engineering Arizona State University Tempe, AZ 85287, USA, Fax: (+1) 480-965-1881

  2. 2

    Biodesign Institute Arizona State University Tempe, AZ 85287, USA

  3. 3

    Embedded Systems Research Center Motorola Labs Tempe, AZ 85284, USA

Publication History

  1. Issue published online: 2 OCT 2006
  2. Article first published online: 25 AUG 2006
  3. Manuscript Received: 21 APR 2006

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Keywords:

  • carbon nanotubes;
  • field-effect transistors;
  • heavy metals;
  • ions;
  • sensors

Graphical Abstract

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For heavy metal fans… Functionalized single-walled carbon nanotubes (SWNTs) have been utilized within a field-effect transistor device as a means of detecting nickel and copper ions. Peptide-modified monomers were electropolymerized onto the surface of the SWNTs, which was placed between source and drain electrodes (see schematic; DDT=dodecanethiol, PDMS=poly(dimethylsiloxane), CE=counter electrode, RE=reference electrode). Selective detection can be achieved as a result of the affinity of certain peptide sequences to particular metal ions.

Abstract

A method to functionalize single-walled carbon nanotubes (SWNTs) in a field-effect transistor (FET) device for the selective detection of heavy-metal ions is presented. In this method, peptide-modified polymers were electrochemically deposited onto SWNTs and the selective detection of metal ions was demonstrated by choosing appropriate peptide sequences. The signal transduction mechanism of the peptide-modified SWNT-FETs has also been studied.

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