Study on Pd functionalization of microcantilever for hydrogen detection promotion

Yen I. Chou*, Hsu Cheng Chiang, Chi-Chuan Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

An absorption-actuated cantilever sensor often suffers from the severe problem of interface sliding between the functionalization coating and the cantilever surface due to overlying structural expansion of the surface coating. In this work, the microcantilever with Pd functionalization was employed for hydrogen detection. Two effects of Pd deposition technique and cantilever surface design were first contributed towards the effective Pd functionalization for superior hydrogen sensing performance. Experimental results indicated that the sputtering deposition technique benefited the Pd functionalization with compact structure and preferable adhesion for efficient sensing transduction. Surface design via trench modification could further provide the effective interlocking of Pd functionalization with the cantilever surface. For hydrogen detection, the Pd-functionalized cantilever with trench modification showed the superior sensing characteristics with higher sensitivity and a lower detection limit.

Original languageEnglish
Pages (from-to)72-78
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume129
Issue number1
DOIs
StatePublished - 29 Jan 2008

Keywords

  • Hydrogen sensor
  • Microcantilever
  • Pd functionalization
  • Surface design

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