Control of viscoelasticity using redox reaction

Koji Tsuchiya, Yoichi Orihara, Yukishige Kondo, Norio Yoshino, Takahiro Ohkubo, Hideki Sakai, Masahiko Abet

Research output: Contribution to journalArticlepeer-review

239 Citations (Scopus)


The viscoelasticity of a fluid was tuned with the Faradaic reaction of (11-ferrocenylundecyl)trimethylammonium bromide (FTMA), a "redox-switchable" surfactant. An aqueous solution of the reduced form of FTMA exhibited a remarkable viscoelasticity in the presence of sodium salicylate (NaSal) because of the formation of three-dimensional entanglement of wormlike micelles. Electrolytic oxidation of FTMA caused the viscosity of the system to dramatically decrease and the elasticity to disappear. This drastic decrease in viscoelasticity arose from the disruption of wormlike micelles. This novel electrorheological phenomenon is expected to be applicable to ink for inkjet printers, the electrochemically controlled release of substances entrapped in wormlike micelles of FTMA, and fluid flow rate control using electric signals.

Original languageEnglish
Pages (from-to)12282-12283
Number of pages2
JournalJournal of the American Chemical Society
Issue number39
Publication statusPublished - Oct 6 2004
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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