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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.