Nanotechnology - Unit Detail

Total duration

16 lessons, 1 hour each

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Lesson 2.2 – Seriously Hydrophobic Stuff B

Learning outcomes

In this lesson students will:

Big ideas

Learning Sequence

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  1. Welcome students and briefly review the key ideas on hydrophobic materials from the previous lesson.
  2. Investigation – Teacher uses PowerPoint L2.2 Surface Tension.pptx to investigate student understandings of surface tension. Resources
  3. Discussion – Invite students to provide examples of hydrophobic materials, and introduce Polyfluorinated materials as being both hydrophobic and Lipophobic. The surface coating ‘Teflon’ is a good example of a common Polyfluorinated surface used widely in households. Resources
  4. Investigation – Students to view the YouTube – Hydrophobic Surfaces – GE clip that are designed to keep surfaces clean and dry. Resources
  5. Discussion – Students to view the YouTube - Lotus effect superhydrophobic surfaces clip. Teacher invites questions raised by viewing the clip. Resources
  6. Investigation – Teacher investigates the properties of Teflon and SBS rubber – how do the surface/Nano-scale properties of these substances affect their bulk properties? Several samples of Teflon coated surfaces and SBS rubber are required.
  7. Reflection – What would you treat and not treat with a polyfluorinated coating? Students to discuss and provide feedback to the teachers and other students.

Home Learning

  1. Students are encouraged to make their own magic sand following the YouTube Instructions provided. Resources
  2. Students to watch the video The strange new world of Nano science - Stephen Fry. Resources