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    Surface Science Blog You have only scratched the surface.

    Susanna Laurén

    Susanna Laurén

    Susanna is an Application Scientist at Biolin Scientific. In her PhD thesis, she developed fabrication methods for a new type of inorganic-organic polymers. Microfabricated polymer chips were utilized as tool for biomolecule separation in analytical chemistry.

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    > 3 min

    Demulsification of oil-water emulsions

    Demulsification is a process where emulsions are broken down, most typically by the addition of chemicals.

    > 3 min

    Evaluation of emulsion stability by interfacial rheology measurements

    Interfacial rheology studies the flow properties of the interfacial layer that is formed between two immiscible fluids, such as oil and water.

    < 3 min

    Urinary catheters – hydrophilic coatings for better lubricity

    The good lubricity is needed as the poorly lubricated catheters can cause trauma as a result of high frictional forces between the biomaterial and tissue.

    > 3 min

    Plasma treatment and hydrophobic recovery of polymers

    Plasma treatment is able to increase the wettability of most polymers. Hydrophobic recovery is often encountered which causes wettability to decrease. 

    < 4 min

    Cassie – Baxter equation – Extreme wettability on surfaces

    To better describe the real surfaces, different wetting states have been proposed. The most discussed are Wenzel state and Cassie-Baxter state.

    < 3 min

    Hydrophilic coatings to improve protein resistance of biomedical devices

    Surface chemistry plays a significant part in terms of interactions with the human tissue.

    < 6 min

    Pendant drop method for surface tension measurements

    Surface tension can be measured with force tensiometer using Du Noüy ring or Wilhelmy plate. Or with optical tensiometer using the pendant drop method.

    < 4 min

    Surface tension measurement by Du Noüy ring method

    Du Noüy method utilizes the interaction of a platinum ring with the surface of the liquid.

    ~ 5 min

    What is a Langmuir film?

    Langmuir film can be defined as an insoluble monolayer of atoms, molecules, or even nanoparticles floating at the liquid-gas interface (or liquid-liquid).

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