Equipment Name: First Ten Angstroms 1000 B Drop Shape Instrument
General Description: Contact angles describe the shape of a fluid drop in contact with a solid. FTÅ instruments measure these by imaging the drop on a CCD camera and analyzing the captured images on a computer. Contact angle measurements are used to determine the cleanliness of surfaces, with applications from electronics materials such as semiconductors and hard disks all the way to metal working. Contact angles are also used to derive surface energy, and find application in evaluating surface treatments such as corona and plasma processing. Finally, contact angles are used to derive wettability parameters, for both absorbing and non-absorbing materials. Surface and interfacial tensions of fluids can be measured directly from drop shape. Surface tension will change in the presence of surfactants, and surfactant characteristics can be derived from these changes. Measurements can either be static, implying a sense of equilibrium, or dynamic, where they vary as a function of time. In this latter case, the change in drop volume on the surface reflects absorption.
- FTA offers specialized equipment to dispense small volumes of liquids.
- Dispense heads are available for OEM inclusion into other systems. These heads include a modern software interface that allows the driver to be included into the user's Visual Basic or C++ code.
- Prosilica GC705 gigabyte Ethernet camera with a 752 x 480 pixel resolution at 62 frames per second with 0.7 – 4X magnification.
- Manual stage movement.
- 30 gauge, 27 gauge, and 20 gauge stainless steel dispensing needles.
- Drop Shape Analysis Software version 2.0 for contact angle and surface tension analysis.
- Trek 603 power amplifier.
- Tektronix AFG3022B dual channel function generator.
Useful System Links
Equipment Use Fees
Internal $10/hour External $20/hour
Staff time: Internal: $40/hour External: $80/hour