Measurement of inter-particle forces by an interfacial force microscope

Qing Huang, Asghar Mesbah-Nejad, Seyed M. Tadayyon, Peter Norton, Hui Zhang, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

7 Citations (Scopus)

Abstract

An interfacial force microscope (IFM) was employed to measure the inter-particle forces between two individual glass beads with diameters varying from 8 to 20 μm. With the feedback function of IFM turned off, attractive forces were obtained. The forces varied in the range of 0.1-0.34 μN, and their validity was confirmed by a theoretical analysis of the van der Waals force between the same glass beads. With the feedback function switched on, no attractive forces between particles were detected by the IFM when the probe approached the sample substrate. This may be attributed to the dramatic change of the attractive forces within a very short separation distance and/or the relatively poor signal-to-noise ratio of the IFM.

Original languageEnglish
Pages (from-to)400-406
Number of pages7
JournalParticuology
Volume8
Issue number5
DOIs
Publication statusPublished - Oct 2010
Externally publishedYes

Keywords

  • Fine powder
  • Inter-particle forces
  • Interfacial force microscope
  • van der Waals force

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Materials Science (all)

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