Tool Manager: Brian Bowman

Location: Duffield 226

The NBTC contact angle goniomter/tensiometer is capable of measuring  contact angle and also for determining the surface energy of a sample. Contact angle measurements are useful for determining the surface properties of a material. This can include a surface's wettability and its surface free energy. The contact angle can help to determine the cleanliness of a surface and to verify that a particular chemical modification has taken place.

NBTC Rame Hart model 500 goniometer contact angle measurement


  • Can determine surface free energy of liquids or solids or contact angle.
  • Automated Dispensing System which can be controlled by the computer
  • Environmental Chamber, capable of a temperature range from 0-300 C, gas composition control,  atmospheric pressures from 1-0.6 atm.
  • Quartz cell, for liquid/liquid, inverted sessile drop, and captive bubble studies.
  • Sample size: Material requirements: The surface can be as small as about 0.5 x 0.5 cm, and at least as large as an 8 inch Si wafer. A typical drop covers an area 1-2 mm in diameter. The region being tested should be chemically uniform over at least that size area.
  • Liquid requirements: At least 100 microliters, compatible with a glass microsyringe.

Helpful Links

Instrument protocols in the "downloads" menu to the right.
Manufacturer's Website