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Design and Applied Technology (Secondary 4-6)
52
Nanotechnology applications
Scientists and engineers make use the special properties of new materials to many applications
in recent years. For example, some materials can change their shape or sizes when heated, or
change from liquid to solid when placed near a magnet. Such materials are called smart
materials.
The changeability of smart materials’ properties allows great development in the field of
material science.
The family members of smart materials include piezoelectric materials, magneto-rheostatic
materials, electro-rheostatic materials and shape memory alloys. Some of them have already
been, and many others are going to be, incorporated in daily life, such as coffee pots, cars and
eyeglasses.
Piezoelectric materials have two unique but interrelated properties. Firstly, a piezoelectric
material will release a tiny but still measurable electrical discharge when deformed. Secondly,
a piezoelectric material’s volume will enlarge up to 4% when an electrical current passes
through it.
Energy
Medicine & Drugs
Nano Devices
Optical engineering
Defence
Bio-engineering
Cosmetics
Nano Fabrics
Nanotechnology
Application
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