Electrospun fibrous polyacrylic acid membrane-based gas sensors

Bin Ding, Michiyo Yamazaki, Seimei Shiratori

Research output: Contribution to journalArticlepeer-review

131 Citations (Scopus)

Abstract

Electrospun fibrous polyacrylic acid (PAA) membranes were studied as sensing material coated on quartz crystal microbalance (QCM) for ammonia detection at ppb level. The fibrous membranes with different morphology can be deposited on the electrode of QCM by electrospinning the PAA solutions with various solvent composition of H2O and ethanol. The results of sensing experiments indicated that the sensitivity of the fibrous membranes coated QCM (FM-QCM) sensors was four times higher than that of the casting films coated QCM (CF-QCM) sensors. Meanwhile, the FM-QCM sensors exhibited high sensitivity towards low concentration of ammonia, as low as 130 ppb at the relative humidity of 40%. The pre-sorbed water in fibrous membranes was proved to be the key factor to affect the sensitivity of FM-QCM sensors for ammonia. The sensor performance has been found to depend on the morphology of the fibrous membranes, concentration of ammonia, coating load of the fibrous membranes on QCM, and relative humidity. Preliminary study of the stability investigation was also presented.

Original languageEnglish
Pages (from-to)477-483
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume106
Issue number1 SPEC. ISS.
DOIs
Publication statusPublished - 2005 Apr 29

Keywords

  • Casting films
  • Electrospun fibrous membranes
  • Gas sensors
  • Polyacrylic acid (PAA)
  • Quartz crystal microbalance (QCM)

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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