Hydrophilic and Hydrophobic Surfaces

Published by the National Nanotechnology Infrastructure Network, and created by Alonda Droege and the University of Washington, this 50-minute activity "explores how nanotechnology can be used to change the properties of a surface so that it either attracts or repels water." The Teachers' Guide PDF details the necessary materials and advanced preparation for the activity, as well as background information, laboratory questions, and safety information. The Student Worksheet PDF gives background information needed to explore hydrophilic and hydrophobic surfaces, the materials for the laboratory activity, and step-by-step procedures with illustrations. There is also a place for students to record their observations and three summary questions following the activity. This is an excellent activity for students to learn about nanotechnology and hydrophobic / hydrophilic surfaces first hand.