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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~ 4 min

What are the differences between ASTM D971 and IEC 62961 standards?

The new standard IEC 62961 for the transformer oil quality testing has just been released. In this blog post, the main differences between the old ASTM D971 and the new IEC 62961 standard are discussed.

> 3 min

How to measure contact angle hysteresis?

The measurement methods can be divided into optical (needle and tilting methods) and force (Wilhelmy method) depending on the measurement principle used. All the methods are measuring advancing and receding contact angles which are used to calculate contact angle hysteresis.

~ 1 min

Are you prepared for the new transformer oil quality standard?

Interfacial tension of insulating liquids against water has been used for a long time as a criterion for aging evaluation. The latest revision for the ASTM D971 standard dates back to 2012. The new IEC standard is about the be released to improve the accuracy of the method.

> 2 min

What is contact angle hysteresis?

Contact angle hysteresis (CAH) is an important physical phenomenon. When you look through the window on a rainy day, you have probably noticed that some of the water droplets stick to the glass even though gravity is pulling them down. The phenomenon can be explained by contact angle hysteresis.

< 3 min

How to characterize surfactant solutions?

Surfactants are used in many industrial fields. Characterization of surfactants is thus important to optimize their performance and the products they are applied to. Surface and interfacial tension measurements offer versatile method to study the properties and behavior of the surfactant solution.

< 3 min

Why measure dynamic contact angles?

Contact angles are routinely measured as they offer simple, yet extremely sensitive measurement method for surface characterization. Although, the static contact angle is an excellent tool, more in-depth understanding of the surface properties require dynamic contact angle measurements.

< 4 min

What are surfactants and how do they work?

A term surfactant comes from the word surface active agent. At the interface, they align themselves so that the hydrophobic part is in the air and hydrophilic part is in water. This will cause the decrease in surface or interfacial tensions.

> 5 min

How to fabricate better nanoparticle thin film sensors?

Nanoparticle thin film-based sensors offer several advantages over traditional sensor types, especially in electrochemical sensing. The main challenge has been the fabrication of the nanoparticle sensing layer. Two main methods have been used; layer-by-layer (LbL) and Langmuir-Blodgett (LB).

> 4 min

Do you know the science behind the FIFA World Cup football?

The official World Cup ball 2018 is called Telstar 18, inspired by the original Telstar that was made for 1970 games. It resembles the one used in 1970 by the appearance but that's where the similarities end. Have you ever thought how much science is put behind to develop the perfect soccer ball?

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