Hydrogen sensors based on aligned carbon nanotubes in an anodic aluminum oxide template with palladium as a top electrode

Dongyan Ding, Zhi Chen, Suresh Rajaputra, Vijay Singh

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

Robust carbon nanotube (CNT)-based hydrogen sensors were fabricated from aligned CNTs grown in an anodic aluminum oxide (AAO) template. Without Pd modification, an Au-electrode CNT sensor shows no response to hydrogen gas. On the other hand, a Pd-electrode CNT sensor is sensitive to medium concentration hydrogen gas (from 0.1% to 1.5% H2) at room temperature. The aligned CNTs in the AAO template are also a good support for the nanoporous Pd film sensor, which is sensitive to hydrogen gas at concentrations ranging from 100 ppm to 1.5% H2.

Original languageEnglish
Pages (from-to)12-17
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume124
Issue number1
DOIs
StatePublished - Jun 10 2007

Bibliographical note

Funding Information:
This work was supported by National Science Foundation (EPSCOR0447479), Department of Energy (DE-FG02-00ER4582 and DE-FG26-04NT42171), and Army Research Laboratory (W911NF-04-2-0023).

Keywords

  • Carbon nanotube
  • Hydrogen sensor
  • Palladium
  • Resistance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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