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Code Number: 2A10.28

Demo Title: Surface Tension - Lotus Effect

Condition: Good

Principle: Surface Tension

Area of Study: Fluids

Equipment:

Maze toy with mercury drop,  PIRA and Halloween templates, food coloring, water.

Procedure:

The object of the toy is to guide the mercury drop through the maze to the space in the center.  

NOTE:  Do not open or break the toy in such a way as to release the mercury.

The templates are coated with a hydrophobic layer the will allow you to fill the letters and objects with colored water to a high level.

References:

  • Peppino Sapia, "Inflating/Deflating Drops", TPT, Vol. 62, #8, Nov. 2024, p. 701.
  • Said Shakerin, "Lotus Effect Toy", TPT, Vol. 49, # 6, Sept. 2011, p. 346.
  • F. Behroozi, "Determination of Contact Angle From the Maximum Height of Enlarged Drops on Solid Surfaces", AJP, Vol. 80, # 4, April 2012, p. 284.
  • Herb Strongin, “Investigating Red Drop - Green Drop“, Science on a Shoestring, p. 2. 
2A10.28 - Lotus Effect - Hydrophobic Paint