Swelling signals of polymer films measured by a combination of micromechanical cantilever sensor and surface plasmon resonance spectroscopy

Shinichi Igarashi, Akiko N. Itakura, Masaya Toda, Masahiro Kitajima, Liqiang Chu, Anye N. Chifen, Renate Förch, Rüdiger Berger

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

Swelling of plasma-polymerized allylamine (PPAA) films has been investigated by using a combination of micromechanical cantilever sensor (MCS) and surface plasmon resonance (SPR) spectroscopy. The bending responses of the polymer-coated MCS were compared with simultaneously measured reflectivity changes recorded by SPR for both, highly and low crosslinked plasma-polymerized films in N2 atmospheres with different humidity. Signals attributed to reversible swelling for both plasma polymers were obtained. With increasing the humidity, the thickness increase of a highly crosslinked film was lower than that of a low crosslinked film. In contrast, the MCS coated with a highly crosslinked film exhibited a larger deflection. This demonstrates that a plasma-polymerized allylamine film of higher crosslink density can transduce more efficiently the swelling to the MCS bending than a film of lower crosslink density under identical environmental conditions.

Original languageEnglish
Pages (from-to)43-49
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume117
Issue number1
DOIs
Publication statusPublished - 2006 Sep 12
Externally publishedYes

Keywords

  • Humidity
  • Micromechanical cantilever sensor
  • Plasma-polymerized film
  • Surface plasmon resonance spectroscopy
  • Swelling of thin film

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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