Contact Angle Goniometer


Order Code: L2004A1-UK
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Rapid contact angle measurements with easy & accurate analysis.

Optimise inks & coatings efficiently with HD recording & intuitive PC software.


 

The Ossila Contact Angle Goniometer provides a fast, reliable, and easy method to measure the contact angle of a droplet on a surface.

With its low price, compact size, and intuitive PC software - the barrier-to-entry is lowered, enabling more researchers than before to perform this useful and versatile measurement. It is covered by our FREE 2-year warranty.



Features

Affordable - Emerging camera technologies have allowed high-resolution images to be captured for much lower material costs. This means we can reduce the price of contact angle measurements, without compromising on quality.

Simple to Use - The system comes complete with PC software that provides a simple and intuitive interface for contact angle measurements. We also provide user guides and videos to help you get the most out of your experiments.

Compact Size - The small footprint of the system lets you perform measurements in labs even when space is lacking. With a total bench area of 10 cm x 30 cm, you won't need to devote a whole desk to a single piece of equipment.

Easier Ink Optimisation - A low price and small size makes it possible for labs to have multiple systems. This enables constant access to contact angle measurements, without needing to wait in line for a colleague to finish using it. The continuous feedback you gain from in-line contact angle measurements will speed up your ink formulation process.

High-Resolution Video - Take quality videos of your droplets using the high-resolution camera and a specially selected imaging lens. Watch and edit your videos however you like by exporting them as .avi files.

Rapid Image Capture - The high frame rate of the system allows you to study the wetting process in detail, and gain increased insight into film formation.


contact angle labelled diagram


 


Example Applications

Contact angle measurements are a fundamental tool in researching a huge variety of topics. Almost any field of materials science can learn something from a contact angle measurement. The examples given below are just a few of the many applications that the goniometer can be used for.

contact angle graph
Contact Angle vs Time

Thin Film Scale-Up - For solution-processable technologies such as perovskite solar cells or OLEDs, moving from laboratory-scale device fabrication to a commercial scale is one of the great challenges in research. Scalable deposition techniques are being used to create increasingly large devices. For instance, a researcher who usually fabricates devices using a spin coater may want to create larger devices by using a slot-die coater. To do this, they will require new inks with different wettability levels. The Contact Angle Goniometer allows them to quickly identify the solutions that will wet to a substrate surface and form uniform thin-films.



solution wetting
Solution wetting on a substrate surface

Material/Solvent Compatability
When solution processing thin film electronic devices, it is common to deposit a new material layer on top of another previously-deposited layer. The choice of solvent and processing technique will determine whether or not this is possible. If the first layer in the stack can be dissolved in the same solvent as the second, damage can occur. A contact angle measurement can help you find out if the solution you deposit is penetrating the layer that is is deposited onto.



solvent ingress
Solvent ingress effect on contact angle

Substrate Cleaning - The contact angle of a droplet is partly determined by the surface on which it is deposited. The goniometer can therefore be a useful tool for determining substrate cleanliness and making sure there are no unwanted pieces of dust or dirt on the substrate. For example, when using an UV ozone cleaner to remove organic contaminants from an ITO substrate, a contact angle measurement allows you to directly measure the success of your technique.



clean substrate
Substrate cleanliness effect on contact angle

Hydrophobic Coating - Sometimes we do not want a solution to wet well to a surface, and coatings are developed to force a liquid to dewet upon contact. The goal of a hydrophobic coating is therefore to create a high contact angle between a liquid and a substrate. A contact angle goniometer is a required piece of equipment for studying and improving these coatings.



hydrophobic coating
Contact angle on a hydrophobic coating

Contact Angle Software

The Contact Angle Goniometer comes complete with user-friendly measurement software. This software is designed to be as intuitive as possible, however we also provide guides on how to use it most effectively.

This PC software has two main interactive sections: recording and analysis.

Recording

The recording section lets you capture high-resolution videos of a droplet landing on a surface. Videos will automatically be saved to a file destination of your choosing, and are saved in .avi file format, so you can watch them in any common video player or edit them in a video editor. When loaded into the contact angle software, the videos will appear as a series of images which can be analysed individually. The video below shows a droplet being dispensed and recorded using the Contact Angle software.

 

Analysis

Use the analyse tab to measure the contact angle of your recorded droplets. The user sets a baseline and a 'Region of Interest' (ROI) surrounding the droplet. A threshold is then applied to the ROI, resulting in a high-contrast droplet shape. A curve is fitted to the edge of the droplet, tracing out its outline. This is repeated for both the left and right sides. Where the curve crosses the baseline, its tangent is used to determine the contact angle. The video below shows how to measure contact angles using the Contact Angle software.

For more information on contact angles, please see our contact angle theory and measurement guide guide.

contact angle polynomial fitting
Contact Angle Fitting
 

The table below shows the resolution and the maximum frame rate.

 

Resolution Frame Rate (fps) Time Between Frames (ms)
1920 x 1080 30 fps 34

 


Software Requirements

Supported Operating Systems Windows Vista, 7, 8, and 10 (64 bit)
Minimum Monitor Resolution 1920 x 1080
Required Hard Drive Space 450 MB

 


Specifications

Measurement Accuracy
± 1o
Measurement Range
5o - 180o
Overall Product Dimensions

Width: 100 mm
Height: 100 mm
Depth: 300 mm

Stage Area 5.5 cm x 5.5 cm
Maximum Camera Resolution 1920 x 1080


Product Testimonials

Contact Angle Goniometer

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To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.