Surface forces between mica surfaces confining inorganic nanoparticle dispersions and frictional properties

Rastko Joksimovic, Masashi Mizukami, Daisuke Hojo, Tadafumi Adschiri, Kazue Kurihara

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The normal forces between mica surfaces confining dispersions of ceria (CeO2) nanoparticles in decalin were measured using the surface forces apparatus. The nanoparticles (size ca. 6nm), synthesized under supercritical conditions in a cubic shape, were coated with decanoic acid. A repulsion force appeared at a distance of 50-80nm for the first compression, whereas the range was reduced in the subsequent approaches. This indicated that the nanoparticles were rearranged on the mica surface by compression from a disordered initial adsorption pattern. Resonance shear measurements were applied for the first time to a nanoparticle dispersion. The confined particle layers were shown to significantly reduce the friction compared to the mica-mica contact. Those results should contribute to the understanding of the assembly of nanoparticles into thin films under confinement and to the implementation of nanomaterials in tribological applications.

Original languageEnglish
Pages (from-to)70-77
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume463
DOIs
Publication statusPublished - 2014 Dec 5

Keywords

  • Ceria nanoparticles
  • Nanotribology
  • Resonance shear measurements
  • Surface forces apparatus

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'Surface forces between mica surfaces confining inorganic nanoparticle dispersions and frictional properties'. Together they form a unique fingerprint.

Cite this