Interfacial ion fluxes at nanostructured thin films

Nancy N. Kariuki, Jin Luo, Li Han, Mathew M. Maye, Melissa J. Patterson, Laura Moussa, Maria Hepel, Chuan Jian Zhong

Research output: Contribution to journalConference article

Abstract

Thin films derived from nanocrystal cores and functionalized linkers provide large surface-to-volume ratio and three-dimensional ligand framework. This paper describes the results of an investigation of the interfacial ion fluxes associated with redox reactivity and structural properties of such films using cyclic voltammetry, electrochemical quartz-crystal nanobalance, surface infrared reflection spectroscopy, and X-ray photoelectron spectroscopy. Films from gold nanocrystals of 2 nm core sizes and 11-mercaptoundecanoic acid were studied as a model system. First, the film coated on electrode surface displays redox-like voltammetric waves characteristic of the deprotonation-reprotonation of the carboxylic acid groups in the nanostructured network. This process is accompanied by mass changes. Secondly, the film exhibits capability for the complexation of copper ions via the nanostructured carboxylate framework. This process is also accompanied by interfacial fluxes of electrolyte cations across the electrode |film| electrolyte interface which compensate electrostatically the fixed negative charges in the reduction process.

Original languageEnglish (US)
Pages (from-to)181-186
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume752
StatePublished - Jul 25 2003
EventMembranes Preparation Properties and Applications - Boston MA, United States
Duration: Dec 2 2002Dec 5 2002

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Kariuki, N. N., Luo, J., Han, L., Maye, M. M., Patterson, M. J., Moussa, L., Hepel, M., & Zhong, C. J. (2003). Interfacial ion fluxes at nanostructured thin films. Materials Research Society Symposium - Proceedings, 752, 181-186.