Interfacial modulus and surfactant coated surfaces

Preeti S. Yadav, Semih Gulec, Akash Jena, Sirui Tang, Sakshi Yadav, David Katoshevski, Rafael Tadmor

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


The Interfacial Modulus (GS) describes the ease at which a functional group within a solid's outer layer can move from a buried position to a more protruding orientation or vice versa. GS is typically sensitive to the out-most layer of the solid's molecules. It can be measured using a Centrifugal Adhesion Balance (CAB) configuration that is aligned for drop sliding at zero normal force. Currently, however, there is no way of measuring GS independently of CAB experiments. In a desire to find independent means for evaluating the interfacial modulus, we present here an alternative way to estimate GS through Surface Force Apparatus estimates of the force associated with single functional groups within such a layer.

Original languageEnglish
Article number045007
JournalSurface Topography: Metrology and Properties
Issue number4
StatePublished - 2 Nov 2018


  • interfacial modulus
  • intermolecular forces
  • refractive index
  • van der Waals forces

ASJC Scopus subject areas

  • Instrumentation
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry


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