Info Broschure DataPhysics Instruments
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„God made the bulk, surfaces were invented by the devil.“ Dear reader, Pauli’s quote illustrates that the analysis of surfaces and interfaces is quite a challenging task. True to our motto “Understanding interfaces”, DataPhysics Instruments has been DataPhysics Instruments – a success story and supported worldwide, with a highly quali- wide reputation for the provision of high quality fied team of scientists and engineers, working meeting this challenge for the past 20 years and providing researchers in science and industry, around the globe, with highly specialised, application targeted...

Optical contact angle measurement The optical analysis of drops that hang from a dosing needle or are placed A well quoted example of large contact angles on a solid surface facilitates the determination of different surface and can be found in nature: when water droplets interfacial parameters. The contact angle that a liquid drop establishes on come into contact with a lotus leaf they roll a solid characterises the solid’s wetting behaviour with said liquid. Having off without wetting the surface. During ‘roll When no other factor is in play measured the contact angles of multiple test...

OCA O ptical C ontact A ngle measuring and contour analysis system The optical contact angle measuring and contour analysis systems of the OCA series combine high resolution optics, exact liquid dosing and precise sample positioning into powerful and reliable measuring systems. The modular approach to all hardware components and application-specific software means DataPhysics Instruments is able to offer a multitude of configurations, ranging from manually operated base systems to fully automated high performance measuring systems. Every drop perfectly dosed Whether utilising manually...

Contact angle measurement on Approximate drop base diameter as a drop volume and contact angle microstructurespicolitre dosing system function of nanolitre dosing system conventional dosing An essential requirement for an accurate contact angle measurement is that the drop does not touch or wet beyond the edge of dose especially small drops when analysing micro-structured samples like printed circuit boards, small medical products, lithographic structures, precision mechanics and assembly components, wires and single fibres. That challenge is met by innovative special dosing systems from...

difficult-to-access spots and determine The Topview Video System TVS opens up a completely new approach to contact angle measurement. With this system deposited drops are monitored and evaluated in topview which allows to investigate previously inaccessible sample spots. Exclusively with the TVS contact angles can be measured, for example, at the bottom of indents of ready-made components or on assembled printed circuit boards. Moreover, the TVS enables the determination of surface homogeneity and surface isotropy. if not possible in side-view — just measure from the top surface energy in...

testing environment The modular approach to the design of the OCA series and the availability Moss or mould on a facade is an unsightly of a wide range of accessories facilitate optical contact angle measure- problem that occurs as a result of high and ments and drop contour analysis under various environmental conditions. long-lasting surface humidity. Temperature, humidity and pressure can be set and precisely controlled. In order to investigate which surface properties This enables the recreation of the most diverse application scenarios and lead to or promote the fastest drying under...

High temperature high pressure The special models of the OCA measuring systems Inside the high pressure chamber from DataPhysics satisfy even the highest customer expectations and Instruments interfacial tensions and contact angles cope with the most challenging measuring environ- under high temperature conditions of up to 200 °C. Inside the high temperature furnace from Correct measuring results under high pressure DataPhysics Instruments contact angle measurements at up to 1 800 °C and under vacuum down to 10 -5 mbar, or inert gas atmosphere, are possible. Shoot for the stars with special...

contact angle measurement robot-guided systems A continuous production control can prevent expensive product In combination with single- and multi-axes robots the PCA can be used to recalls. However, many products are too large or too heavy for directly integrate automated surface analysis into the production process. bringing them to the laboratory and checking them with systems Appropriate robot cells are tailored to each customer’s needs and hence fit designed for laboratory use, like those of the OCA series. To perfectly to every sample. overcome this issue DataPhysics Instruments...

Tensiometry Surface tension acts to contract and minimise any liquid surface. If a surface is being enlarged by the formation of a liquid lamella, as a test body, such as a Wilhelmy plate or Du Noüy ring, is in contact with it, the surface tension exerts a tensile force that can be measured. Within a tensiometer this force is measured by a high precision weighing system Interfacially active compounds like surfactants consist of a hydrophilic be measured with the help of a test body. Since tensiometry is based on force measurements it is – in contrast to the optical analysis of pendant they...

DCAT D ynamic C ontact A ngle measuring device and T ensiometer An automatic, software-controlled liquid dosing and refill unit can be used to create sequential concentration series of, for example, surfactant solutions. Hence, with a special software module the critical micelle concentration (CMC) can be determined in a The dynamic contact angle measuring instruments and tensiometers of series of experiments during which no manual user the DCAT series are multi-functional instruments for the force-based measurement of surface and interfacial tensions, advancing and receding contact angles,...