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Nano 101: Exploring the Nanoworld

Nano 101: Exploring the Nanoworld. Lizzie Hager-Barnard, Lawrence Hall of Science. Topics. What is nano? How do properties change at the nanoscale? Are nano products safe? What are some careers related to nanotechnology?. Intro to Nano.

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Nano 101: Exploring the Nanoworld

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  1. Nano 101:Exploring the Nanoworld Lizzie Hager-Barnard, Lawrence Hall of Science

  2. Topics • What is nano? • How do properties change at the nanoscale? • Are nano products safe? • What are some careers related to nanotechnology?

  3. Intro to Nano http://www.nisenet.org/catalog/media/intro_nano_video

  4. How Small is Nano? http://www.nisenet.org/catalog/media/how_small_nano_video

  5. What is Nanotechnology? Nanotechnology involves manipulating matter at unprecedentedly small scales to create new or improved products that can be used in a wide variety of ways. A nanometer is a unit of spatial measurement that is 10-9 meter, or one billionth of a meter. It is commonly used in nanotechnology, the building of extremely small machines. http://www.nsf.gov/statistics/seind12/pdf/c07.pdf

  6. Nanotechnology: Small, Different, New Key ideas: • The nanometer is extremely small. • At the nanometer scale, materials may behave differently. • We can harness this new behavior to make new technologies.

  7. Why Nano Education? Drawbacks Advantages • Fun! • Breaks down disciplinary boundaries • Cutting-edge • Relevant to future jobs and careers Not inherently interesting (compared to dinosaurs!) Below visible threshold, younger kids have problems visualizing Unexpected properties

  8. Nano Not Widely Understood National Science Board's Science and Engineering Indicators 2012 “24% of Americans report having heard ‘a lot’ or ‘some’ about nanotechnology, up four percentage points from 2008 and 2006” “44% of Americans report having heard ‘nothing at all’ about nanotechnology” Americans remain largely unfamiliar with nano-technology, despite increased funding and a growing numbers of products on the market that use nanotechnology. http://www.nsf.gov/statistics/seind12/pdf/c07.pdf

  9. An Interdisciplinary Endeavor Biology Physics Engineering Chemistry Nanoscience & Nanotechnology Materials Science Medicine Information Technology Biotechnology

  10. What is Nano?

  11. How Big is a Nanometer? http://www.nisenet.org/catalog

  12. How Big is a Nanometer? http://www.nisenet.org/catalog

  13. How Big is a Nanometer? http://www.nisenet.org/catalog

  14. How Big is a Nanometer? http://www.nisenet.org/catalog

  15. How Big is a Nanometer? http://www.nisenet.org/catalog

  16. How Big is a Nanometer? http://www.nisenet.org/catalog

  17. How Big is a Nanometer? http://www.nisenet.org/catalog

  18. How Big is a Nanometer? http://www.nisenet.org/catalog

  19. How Big is a Nanometer? http://www.nisenet.org/catalog

  20. How Big is a Nanometer? http://www.nisenet.org/catalog

  21. How Big is a Nanometer? http://www.nisenet.org/catalog

  22. How Big is a Nanometer? • In the time it takes to read this sentence, your fingernails will have grown approximately one nanometer (1 nm). www.starling-fitness.com

  23. How Big is a Nanometer? • If you could paint a teaspoon of paint one nanometer thick, how much area would it cover? ? Joon Han and Justin Smith / Wikimedia Commons

  24. How Big is a Nanometer? • If you could paint a teaspoon of paint one nanometer thick, how much area would it cover? Joon Han, Justin Smith, Kbh3rd, The Anomebot, Pete Markham / Wikimedia Commons

  25. How Big is a Nanometer? • To cover a football field with a 1nm thick layer of paint, you would need just 1 teaspoon of paint! Joon Han and Justin Smith / Wikimedia Commons

  26. How Big is a Nanometer? • How many sugar molecules in a sugar cube? • What do we need to know (estimate)? • Sugar cube = (1 cm)3 • 1 sugar molecule = (1 nm)3 • \ 1021 sugar molecules in a sugar cube Sugar cubes Biswarup Ganguly / Wikimedia Commons

  27. Activity: Measure Yourself http://www.nisenet.org/catalog

  28. Did Scientists “Create” Nano? • No, it was already in nature! centimeters to micrometers micrometers nanometers http://www.nisenet.org/catalog

  29. Did Scientists “Create” Nano? • No, it was already in nature! centimeters to micrometers micrometers nanometers http://www.nisenet.org/catalog

  30. Smallness Leads to New Properties Sometimes gravity loses! http://www.nisenet.org/catalog

  31. Smallness Leads to New Properties Surface area is really important! http://www.nisenet.org/catalog

  32. Surface Areas at the Nanoscale 1 cm cubes 1 mm cubes 1 nm cubes http://www.nano.gov/nanotech-101/special

  33. How Surface Area Scales (Changes) For a fixed total volume, decreasing the radius by a factor of two doubles the surface Crushing a 1cm particle into nano particles increases the surface area thousands of times!

  34. How Surface Area Scales (Changes) 1 nm particles  1010 m2 1 micron particles  107 m2 1 cm particles  103 m2 nano

  35. Smallness Leads to New Properties Reactivity Melting point Strength Conductivity Color Bulk Gold Bulk Aluminum Nano Aluminum Nano Gold http://www.carterrecycling.com/myimages/aluminum_cans.jpg http://healthewoman.org/2008/11/11/how-healthy-is-your-workplace/ http://mrsec.wisc.edu/Edetc/nanolab/gold/images/goldp6.jpg http://texasenterprise.org/article/warren-buffet-and-new-calculus-gold

  36. Nano and Me - Aluminum http://www.nisenet.org/catalog

  37. Stained Glass: Size Matters Gold particles http://www.cas.muohio.edu/nanotech/education/k_12.html http://www.horiba.com/scientific/

  38. Stained Glass: Size and Shape Matter Controlling the Quantum World: The Science of Atoms, Molecules, and Photons,2007

  39. Stained Glass: Size and Shape Matter Controlling the Quantum World: The Science of Atoms, Molecules, and Photons,2007

  40. Stained Glass: Size and Shape Matter Controlling the Quantum World: The Science of Atoms, Molecules, and Photons,2007

  41. Stained Glass: Size and Shape Matter Particle shape also affects the color! http://commons.wikimedia.org/wiki/File:Native_gold_nuggets.jpg http://www.cat.gov.in/technology/laser/lpas/pps.html

  42. Activity: Nano Fabric and Magic Sand http://www.nisenet.org/catalog http://www.stevespanglerscience.com/product/magic-sand

  43. Activity: Nano Fabric water air nano-roughened surface http://www.nisenet.org/catalog

  44. Zoom into a Lotus Leaf http://www.nisenet.org/catalog

  45. Activity: Nano Sunblock • Some sunscreen use chemicals • Other sunscreens use zinc oxide http://www.nisenet.org/catalog vitaderminstitute.com/

  46. Sunscreens vs Sunblocks, Continued How could sunscreen and sunblock work? Sunscreen/Sunblock Sunscreen/Sunblock Sunscreen/Sunblock Skin Skin Skin Absorption Reflection Transmission 46

  47. Sunscreens vs Sunblocks, Continued How could sunscreen and sunblock work? Sunscreen/Sunblock Sunscreen/Sunblock Sunscreen/Sunblock Skin Skin Skin Absorption Reflection Transmission Sunscreensand sunblocksboth usually work through absorption of UV rays Sunblocks are better because they absorb more of the UV rays 47

  48. Inorganic Sunblocks Absorb UV Better ideal UVB UVA visible 48

  49. Nano Sunblock Traditional zinc oxide sun blocks are very visible Modern zinc oxide sun blocks are fairly invisible after application vitaderminstitute.com/ http://www.tackletour.com/reviewbluelizard.html

  50. Nano Sunblock Same black:white ratio Can see larger white circles much better http://www.nisenet.org/catalog

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