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STM. Scanning Tunneling Microscope What is a Nanometer? (Activity) Developed by Malory M. Peterson, Summer 2006 Nanotechnology Grant National Science Foundation #0532516. Let’s Start by Reviewing Size.

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STM

Scanning Tunneling Microscope

What is a Nanometer? (Activity)

Developed by Malory M. Peterson, Summer 2006 Nanotechnology Grant

National Science Foundation #0532516

Let’s Start by Reviewing Size
• Take a look at the meter stick that is provided. (Your colors may vary from the ones on the example).
• The whole stick (all colors) is one meter long.
Decimeter
• 1/10 of a meter is represented by the blue, pink, and green end.
• 1/10 of a meter is called a decimeter.
Centimeter
• 1/10 of a decimeter is represented by the pink and green.
• 1/10 of 1/10 is 1/100.
• 1/100 of a meter is called a centimeter.
millimeter
• If we take just the green section that is 1/10 of 1/10 of 1/10.
• This is also 1/10 of 1/100, or 1/10 of a millimeter.
• Also, 1/1000 of a meter.
• This is called a millimeter
Review
• We have just divided the meter stick into 10ths.
• We did this 3 times and ended up with millimeters.
micrometer
• Imagine we took just the green millimeter and divided that into 10ths three times, like we did before.
• This would give us something very small.
• This would be 1/1,000,000 of a meter or a micrometer.
nanometer
• If we took that micrometer and divided it into tenths, three times, we would get something on the atomic level.
• This is one billionth (1/1,000,000,000) of a meter.
• This is a nanometer
STM
• The STM images on the nanometer scale.
• This would be the same as taking a meter stick and dividing it into ten pieces 9 times!
• This is why the nanometer is symbolized by 10-9.
• 10-9 meters can also be written as .000000001 meters or 1 E-9meters.
• Atoms and molecules can only be “seen” on the nanometer scale.