Au nanoparticles decorated polyaniline nanofiber sensor for detecting volatile sulfur compounds in expired breath

Chuanjun Liu, Kenshi Hayashi, Kiyoshi Toko

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

A chemiresistive sensor based on polyaniline (PANI) nanofibers decorated with highly dispersed gold nanoparticles (AuNPs) is developed to detect the volatile sulfur compounds (VSCs) of human expired breath. The PANI nanofibers with a characteristic of horizontal orientation on the insulating gap area of an interdigitated electrode are prepared by a temple-free electrochemical polymerization. The formation of the fine AuNPs on the PANI nanofibers is realized by the redox reaction between HAuCl 4 and PANI in the form of emeraldine. The PANI/AuNPs sensors exhibit good sensing responses to H 2S and CH 3SH gases. The sensing ability of the fabricated electrodes on VSCs contained in human breath is confirmed by their response upon exposure to the expired breath of a healthy volunteer after ingesting raw garlic. The developed nanosensors, together with a multichannel sensing system, are expected to be used in breath analysis and disease diagnose related to malodor biomarker gases.

Original languageEnglish
Pages (from-to)504-509
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume161
Issue number1
DOIs
Publication statusPublished - Jan 3 2012

Fingerprint

Sulfur Compounds
sulfur compounds
Sulfur compounds
Polyaniline
Nanofibers
Nanoparticles
nanoparticles
sensors
Sensors
horizontal orientation
electrodes
biomarkers
gases
Gases
Nanosensors
polymerization
Electrodes
Electropolymerization
methylidyne
gold

All Science Journal Classification (ASJC) codes

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

Cite this

Au nanoparticles decorated polyaniline nanofiber sensor for detecting volatile sulfur compounds in expired breath. / Liu, Chuanjun; Hayashi, Kenshi; Toko, Kiyoshi.

In: Sensors and Actuators, B: Chemical, Vol. 161, No. 1, 03.01.2012, p. 504-509.

Research output: Contribution to journalArticle

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