Precision Optical Tensiometers

Smart Interfacial Measurement Solutions for Wettability and Adhesion

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Attension Theta Topography

Product Image of the Attension Theta Topography
Attension Theta Optical Tensiometer for Topography applications is ideal for studying microscale roughness.  The Topography module is an innovative system capable of separating the effect of surface roughness to the contact angle result. As a result, roughness-corrected contact angles can be better compared with each other for research and quality control purposes.  Roughness correction on contact angles also enables the calculation of fundamental surface free energy on rough surfaces.Examples include:

  • Coatings and surface modifications
  • Paper and board wettability
  • Biocompatibility of implants
  • Construction and building material

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Features & Benefits

  • Integrated method enabling to define contact angle and surface roughness accurately from the same location and to combine both surface chemical and topographical data with automated software calculations.
  • Offers fast surface characterization method, which does not demand specialist to run the samples.
  • Versatile roughness measurement: both 2D and 3D characterization.

Applications

Attension Theta Optical Tensiometer for Topography applications is ideal for studying microscale roughness.  Many surface modification and coating technologies that are used for optimizing wetting and adhesion properties influence both surface chemistry and roughness. Understanding the mechanisms that impact wetting by separating these two factors is a useful tool in product development processes and in quality control.

Product details

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 homogeneous 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 well-known 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, we can perform both measurements from the exact same location and map the complete surface to check homogeneity and cleanliness. With the Theta Topography you can get:

  • Θc, roughness corrected contact angles
  • 3D and 2D topographical parameters and visualization
  • 3D roughness image and parameters: Sdr, Sa and Sq
  • 2D roughness image and parameters: Ra, Rq, Rp, Rv, Rz and R10z

In many applications surface coating and modification influence on both chemical and roughness parameters. Optical tensiometry combined with topography module enables to inspect and separate influence of these two factors to wettability and adhesion.

  • Integrated method enabling to define contact angle and surface roughness accurately from the same location and to combine both surface chemical and topographical data with automated software calculations.
  • Offers fast surface characterization method, which does not demand specialist to run the samples.
  • Versatile roughness measurement: both 2D and 3D characterization.
  • Picoliter Dispenser
  • Based on piezo-driven inkjet printing technology
  • Low volume drops as small as 20 pL
  • Drop volume and velocity can be adjusted by voltage and pulse width from control electronics
  • Dispenser head is chosen according to customer needs
  • Nozzle heater and special sample holder designs available

Application examples

  • Inkjet printing
  • Printed electronics
  • CA of small objects such as single fiber and small O-rings

Unique feature offered only by Attension.