Jump to main content
Jump to site search

Issue 31, 2013
Previous Article Next Article

Back-gated spray-deposited carbon nanotube thin film transistors operated in electrolytic solutions: an assessment towards future biosensing applications

Author affiliations

Abstract

We report on back-gated carbon nanotube (CNT) thin-film transistors (CNTFETs) and their performance in electrolytic solutions to assess their suitability for future application as biosensors. Spray-deposited CNT networks were used as the sensitive active layer which offers the opportunity for integration on flexible sensing platforms at low-cost. We characterized the transistors' behavior in electrolytes by analyzing the response to different KCl solutions and buffers over a wide pH range. We observed a linear response of the drain current upon changing the pH in low molarity buffers and obtained an exponential dependence on the salt concentration of the electrolyte. These responses can be attributed to electrostatic gating effects that go along with shifts in the threshold voltage. Even though a lot of effort has been put into understanding the biosensing mechanism a detailed theory is still missing. Back-gated CNTFETs operated in electrolytic solutions can be a further tool to investigate and clarify the existing unsolved phenomena.

Graphical abstract: Back-gated spray-deposited carbon nanotube thin film transistors operated in electrolytic solutions: an assessment towards future biosensing applications

Back to tab navigation

Publication details

The article was received on 04 Feb 2013, accepted on 15 Apr 2013 and first published on 15 Apr 2013


Article type: Paper
DOI: 10.1039/C3TB20170H
J. Mater. Chem. B, 2013,1, 3797-3802

  •   Request permissions

    Back-gated spray-deposited carbon nanotube thin film transistors operated in electrolytic solutions: an assessment towards future biosensing applications

    A. M. Münzer, M. Heimgreiter, K. Melzer, A. Weise, B. Fabel, A. Abdellah, P. Lugli and G. Scarpa, J. Mater. Chem. B, 2013, 1, 3797
    DOI: 10.1039/C3TB20170H

Search articles by author

Spotlight

Advertisements