Online Workshop: Surface Characterization of Solid-State Materials using Gas Sorption Techniques



Tues 22 June 2021
10 am CEST | 9 am BST
2 hours incl. Q&A
Register free here

Co-organized with:

Dr. Sabiyah Ahmed
Application Scientist
Surface Measurement Systems Ltd
Imperial College London

Guest speaker:

Asst. Prof. Maja Rücker
Eindhoven University of Technology

Join us for this free online workshop to discover how you can use Inverse Gas Chromatography (iGC) technology to measure the surface properties of various solid-state materials. The workshop is organized in partnership with Assoc. Prof. Catarina Esteves at the Eindhoven University of Technology.

This workshop is beneficial to individuals who work in the areas of:

  • Energy and Environmental
  • Polymers & Packaging Materials
  • Membranes, Coatings and Thin Films
  • Fibres and Fillers
  • Porous Materials & Catalysts
  • Biomaterials & Nanomaterials
  • Pharmaceutical and Food Sciences

We are pleased to have Asst. Prof. Maja Rücker give a short presentation on the role of iGC in her research work at Eindhoven University of Technology. Dr. Rücker researches molecular interactions of fluids within porous rocks and how these link to the macroscopic flow phenomena.

In the workshop, you will learn about:

  • Capability of iGC technology and its applications in industries listed above
  • Sorption isotherms & BET surface area
  • Surface energy and surface heterogeneity
  • Adhesion/cohesion, dispersive and acid-base (specific) interactions
  • Diffusion coefficient analysis & Solubility parameters


with Dr. Sabiyah Ahmed, Imperial College London

with Asst. Prof. Maja Rücker, Eindhoven University of Technology

Wettability, the tendency of a solid medium to stay in contact with one fluid in the presence of another, is a key factor influencing multiphase flow in porous rocks as it occurs in sub-surface reservoir. In addition to the average wettability, which is often described through adhesion forces, surface energies or contact angle measurements, the spatial distribution of wettability in the porous rock is significant. Variation in wettability may be related to the surface chemistry of constituent minerals, and also to both surface texture and roughness. In this work, we assessed the relationship between wettability, mineralogy and surface structure for two rocks: Ketton carbonate, which is effectively chemically homogeneous comprising 99.9% calcite; and Bandera Brown sandstone which contains different minerals such as quartz, kaolinite, plagioclase, calcite and illite utilizing inverse gas chromatography (iGC). In previous studies, micro-computed tomography and atomic force microscopy were used to assess visually, how the different wettability-controlling parameters influence the core scale response. However, one downside of both micro-computed tomography and atomic force microscopy is the small sample size, which can barely be considered representative. IGC, on the other hand, is capable of determining molecular and structural properties of the internal rock surface along the length of SCAL-plug through the determination of surface energies and surface areas using a set of probing gases. The full description of the chemical and structural attributes of the internal rock surface at a representative scale provide a way to link molecular attributes with core-scale observations.

with Nachal Subramanian

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