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How Big is a Nanometer? Adapted from Nanosense STEM ED/CHM NSTA 2008

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Educational materials (including today) Summer institute

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Adapted from Nanosense This activity –http://nanosense.org/activities/sizematters/sizeandsca le/SM_Lesson2Teacher.pdfhttp://nanosense.org/activities/sizematters/sizeandsca le/SM_Lesson2Teacher.pdf On our website –www.umassk12.net/nano/NSTAwww.umassk12.net/nano/NSTA Other useful nanoscience materials –http://nanosense.org/index.htmlhttp://nanosense.org/index.html Other nanotechnology and power of ten resources: –http://www.umassk12.net/nano/resources.htmhttp://www.umassk12.net/nano/resources.htm

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How Big is a Nanometer? IBM chipUMass LogoTI mirror array

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The Nano Scale Nano materials are typically 1 to 100 nanometers in size 1 nanometer = 1/1,000,000,000 meters How do such materials fit into the overall scale of objects in nature? And how big is a nanometer in terms of something basic?

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Well use powers of ten Handy way to express very large or very small numbers. Easier than writing lots of zeros! 10 6 reads 'ten to the 6' is 1 followed by 6 zeros, 1,000,000 is 1.0 with the point moved right by 6 places

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Negative powers of reads 'ten to the minus 6' is 1 divided by 10 6, 1/1,000,000 is 1.0 with the point moved left by six places, 0.000,001

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How big is a meter? ~ 1 meter ~2 meters Width? Height?

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10 1 meters = 10 meters Adapted from

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10 0 meter = 1 meter

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10 -1 meters = 0.1 meters fly

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10 -2 meters = 0.01m 1 centimeter = 1 cm

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10 -3 meters = meters Flys eye 1 millimeter = 1 mm

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10 -4 meters = meters Flys eye as seen with electron microscope

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10 -5 meters = meters Red blood cells

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10 -6 meters = 0.000,001 meters Bacteria

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10 -7 meters = 0.000,000,1 meters Computer Chip details meters

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10 -8 meters = 0.000,000,01 meters Quantum corral of iron atoms on a copper surface

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10 -9 meters = 0.000,000,001 meters (1 nanometer = 1 nm) DNA 3 nanometers

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meters = 0.000,000,000,1 meters Carbon atom, with 6 electrons and a nucleus

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meters = 0.000,000,000,000,01 meters Carbon nucleus, made up of 6 protons and 6 neutrons

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meters = 0.000,000,000,000,001 meters Proton (or neutron) composed of 3 quarks 1 femtometer = 1 fm

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So how big is a nanometer? Carbon atom diameter ~ m 10 x m = m 1 nanometer ~ 10 atoms wide Nano wires and tubes are x 10 atoms in diameter Nano films are a x 10 atoms in thickness Nano particles are 1 to 100 x 10 atoms in diameter

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The Size Me Challenge Each team has an envelope containing –A 3 page list of powers of ten –24 picture cards Place each card next to the appropriate power of ten –Size matches will be approximate –Some matches will be easy, some will be hard!

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Thats all for now

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