- Roughness-corrected contact angle and 3D surface roughness
Fringe projection phase shifting method - Interfacial dilatational rheology
Pulsating drop method - Static contact angle
Sessile drop, captive bubble and meniscus methods - Dynamic contact angle
Dynamic contact angle, advancing and receding contact angle, contact angle hysteresis and roll-off angle - Surface free energy
Sessile drop, captive bubble and meniscus methods - Surface- and interfacial tension
Pendant drop and reverse pendant drop methods
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Is your surface smooth?
Wettability is typically studied by a contact angle measurement that can be defined with the well-known Young equation on ideal surfaces. Surface free energy theories are also based on assumptions that Young contact angles are used for calculations. Thus, the surface is assumed to be chemically homogenous and topographically smooth. This is, however, not true in the case of real surfaces. It is well established that surface roughness enhances the existing wetting behavior and influence on adhesion.
Theta Topography makes it possible to define Young contact angle and surface free energy measurements as well as measurements for rough surfaces according to the Wenzel theory. The roughness corrected contact angles make it possible to understand the influence of roughness and chemistry on the wettability of your surface, separately. By using the highly accurate motorized XYZ sample stage, you can perform both measurements from the exact same location and map the complete surface to check homogeneity and cleanliness.
Images show a paper sample measured with Theta Topography. Optical image to the left, 2D representation in the middle and 3D to the right.
Not sure which tensiometer you need?
Our tensiometer selector guides you to your optimal instrument.
Tilting cradle
A software controlled tilting cradle. Used for studying dynamic contact angles. Tilting range from 0 to 90° and tilting resolution 0.1°. The vacuum stage top C204B is recommended to be used with this option.
Picoliter Dispenser
Automated picoliter-scale drop formation. Especially for inkjet applications and for measuring contact angle on very small sample areas.
Measuring chamber, electrically heated, 250° C
Thermostatted electrically heated measuring chamber for air phase temperature control of substrate and drop.
Pulsating Drop Module - PD200
Software controlled drop size pulsing for interfacial rheology measurement of viscoelastic properties of interfacial layers at liquid-air or liquid-liquid interfaces.
Nanjing Univerisity, China
Nanjing University was founded in 1902 and it is one of the key universities in China. Nanjing University measures contact angle, advancing and receding angles and surface tension of liquids with an Attension® contact angle meter to characterize superhydrophobic surfaces.
Aalto University, Finland
Aalto University is a top Finnish university combining science, technology and arts into a collaborative environment for both scientific communities and companies. Our contact angle meters and tensiometers have been used there in research for decades.
