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Determination of low interfacial tensions with the DataPhysics spinning drop video tensiometer
By using the DataPhysics spinning drop tensiometer, the low interfacial tension between surfactant and oil can be determined easily and reliably. The SVT technique provides a fast and efficient way to determine low interfacial tension between liquids with a high reproducibility.

Evaluating the efficiency of surfactants by dynamic interfacial tension measurements of brine and crude oil
Measurements with an SVT spinning drop video tensiometer can give quick, easy to achieve and helpful insights into the behaviour of the interfacial tension between brine and crude oil and hence can be used to improve formulations and procedures used in enhanced oil recovery.

Measuring contact angles and absorption processes on wettable and non-wettable powders using optical contact angle and contour analysis
In this application note, the wetting behaviour of wettable and non-wettable powders were studied using the example of FeSi powders.

Optical contour analysis: absorption measurements of water droplets on filter membranes
The optical contact angle measuring and contour analysis systems of the DataPhysics OCA series with their high frame rate video systems can be used to directly and simply evaluate even the fastest absorption processes. Through the precise and accurate determination of the decrease in volume of a drop moving into an absorbent surface, the details of the influences on the on-going absorption process can be deduced.

Measuring the water contact angle on surface-treated polymer films according to ASTM D5946
In this note, the application of the ASTM D5946 will be presented using an optical contact angle measuring system of the DataPhysics OCA series.

Surface energy analysis of dental Implants after plasma activation with the piezobrush PZ3, using the picolitre dosing system PDDS
The optical contact angle measuring and contour analysis system OCA 200 in combination with the picolitre dosing system PDDS from DataPhysics provides a simple and reliable method to determine the surface energy of dental implants before and after surface treatment with a piezobrush PZ3.

Detection of self-assembled monolayers (SAMs) using contact angle measurements
In this experiment, SAMs out of a vapour phase and out of a solution were applied to platinum surfaces. Using the optical contact angle meter OCA 200 and the PDDS picolitre dosing system from DataPhysics Instruments, differently treated surfaces were examined and quantified using contact angle measurements.

Determination of the surface potential and isoelectric point of wafers with a zeta potential analyzer
In this application note, the zeta potential ζ and the isoelectric point of recently cleaned and activated oxidised silicon wafers as well as silicon wafers coated with a thin aminopropylsilane layer were determined using the ZPA 20 from DataPhysics and the streaming current method.

DataPhysics ZPA 20 zeta potential analyzer
The zeta potential analyzer ZPA 20 is a compact measuring instrument that utilises the patented bidirectional oscillating streaming potential method. It is designed to measure the zeta potential of various macroscopic solid samples with the highest accuracy and within the shortest time.

DataPhysics SVT 25 spinning drop video tensiometer for measuring low to ultra-low interfacial tensions
The spinning drop video tensiometer SVT 25 is a compact optical measuring instrument for the determination of low to ultra-low interfacial tensions and rheological interface properties.

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