Nanostructured electrochemical sensor based on dense gold nanoparticle films

Aimin Yu, Zhijian Liang, Jinhan Cho, Frank Caruso

Research output: Contribution to journalArticlepeer-review

393 Citations (Scopus)


Polyelectrolyte (PE)/gold nanoparticle hybrid films that can be utilized as efficient electrochemical sensors were prepared by infiltrating 4-(dimethylamino)pyridine-stabilized gold nanoparticles (DMAP-AuNP) into PE multilayers preassembled on indium tin oxide (ITO) electrodes. Quartz crystal microgravimetry (QCM) and UV-vis spectroscopy showed that via this infiltration method, composite films with densely packed DMAP-AuNP were obtained. Electrochemical experiments revealed that the presence of gold nanoparticles in the PE multilayers could significantly improve the electron-transfer characteristics of the films, which showed high electrocatalytic activity to the oxidation of nitric oxide (NO). The sensitivity of the composite films for measuring NO could be further tailored by controlling the gold nanoparticle loading in the film.

Original languageEnglish
Pages (from-to)1203-1207
Number of pages5
JournalNano Letters
Issue number9
Publication statusPublished - 2003 Sept 1
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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