Strategy on effective detection of acetaldehydes by using surface-enhanced Raman scattering-active chitosan-capped nanostructured Au

Keng Liang Ou, Ting Chu Hsu, Yu Chuan Liu, Kuang Hsuan Yang, Wen Hsien Sun

Research output: Contribution to journalArticle

3 Citations (Scopus)


According to materials safety and data sheets (MSDS) acetaldehyde is a toxic and cancer-induced reagent. Its presence in spirits can cause damage to livers of drinkers. Conventionally, the concentration of acetaldehyde is measured by using gas chromatography-mass spectrometer (GC-MS). Development of new analytical technology for detecting acetaldehyde would be contributive to human healthy. In this work, we report an innovative idea to prepare functionalized surface-enhanced Raman scattering (SERS)-active chitosan (Ch)-capped nanostructured Au (NSAu) by using electrochemical oxidation-reduction cycles (ORC) for concentrating and detecting acetaldehyde in solutions. Because the capping reagents of Ch are SERS-inactive the SERS intensity of model probing molecules of rhodamine 6G (R6G) adsorbed on Ch-capped NSAu is expectedly reduced, as compared with that adsorbed on NSAu. However, acetaldehyde can react with Ch on Ch-capped nanostructured Au to yield a Schiff base. It is encouragingly found that SERS intensity of acetaldehyde adsorbed on Ch-capped NSAu is markedly increased, as compared with that adsorbed on NSAu. It indicates that the developed SERS-active substrate is enough efficient for the detection of acetaldehyde.

Original languageEnglish
Pages (from-to)66-71
Number of pages6
JournalJournal of Electroanalytical Chemistry
Publication statusPublished - 2013



  • Acetaldehyde
  • Chitosan
  • Oxidation-reduction cycles
  • Raman scattering
  • Surface-enhanced

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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