Presentation on theme: "How Big is a Nanometer? Adapted from Nanosense STEM ED/CHM NSTA."— Presentation transcript:
How Big is a Nanometer? Adapted from Nanosense STEM ED/CHM NSTA 2008
Educational materials (including today) Summer institute
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
How Big is a Nanometer? IBM chipUMass LogoTI mirror array
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?
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
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
How big is a meter? ~ 1 meter ~2 meters Width? Height?
meters = 0.000,000,000,1 meters Carbon atom, with 6 electrons and a nucleus
meters = 0.000,000,000,000,01 meters Carbon nucleus, made up of 6 protons and 6 neutrons
meters = 0.000,000,000,000,001 meters Proton (or neutron) composed of 3 quarks 1 femtometer = 1 fm
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
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!