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Nanoscience Nanotechnology

Nanoscience Nanotechnology. What is it?. What exactly is Nanoscience? What exactly is Nanotechnology? Are they Different?. Vials of Quantum Dots. NOTE: What follows is my view of these subjects. What is Nanotechnology?. The Space Elevator?

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Nanoscience Nanotechnology

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  1. Nanoscience Nanotechnology What is it?

  2. What exactly is Nanoscience?What exactly is Nanotechnology?Are they Different? Vials of Quantum Dots NOTE: What follows is my view of these subjects

  3. What is Nanotechnology? The Space Elevator? Ultra high strength materials allow tower to be built into space !(?)

  4. What is Nanotechnology? Tiny machines in your body curing cancer?

  5. What is Nanotechnology? DNA Computers in a beaker that vastly outperform our fastest supercomputers?

  6. Well …. Sort of…. Not Really…. • Some of these amazing views of the future have a grain of reality in them • We’ll take a look at advances in • Materials science • Nanobiotech • Molecular computing

  7. Nanotechnology APPLICATIONS Super fast/small computers Super strong materials Super Slippery Materials Tissue Engineering Drug Delivery Sensors TECHNOLOGIES Nanomaterials Nanolithography Scanning Probe Microscopy Self-Assembly

  8. Materials Science: Nanomaterials Human Made Materials Biologically made materials

  9. Calcium Carbonate

  10. Calcium phosphate Hydroxyapatite Silica Calcite

  11. 10 mm

  12. Superhydrophobic Surfaces:The Lotus Effect

  13. Carbon Nanotubes CHIN WEE SHONG : AgS2 cubes National University of Singapore Department of Chemistry Quantum dots

  14. Carbon Nanotubes Buckminster Fullerene C60 Smalley, Curl, Kroto. Nobel Prize

  15. Diamond Buckyball Graphite Nanotube The Forms of Carbon Graphein: (Greek) to write

  16. Carbon Nanotubes:Cylinders of Sheet Lattices Nanotubes have chirality Multiwall CNT=Nested tubes

  17. What’s the big deal about carbon nanotubes??? • Amazing Mechanical Properties • Amazing Electrical Properties: • Can be conductors or semiconductors • Could be the building block of nanocomputing

  18. Applications: Composite Materials nanotubes poking out of fractured edge of polymer composite

  19. Applications: Electronics 21 APRIL 2000 VOL 288 SCIENCE www.sciencemag.org Crossed Nanotube Junctions M. S. Fuhrer,1 J. Nyg.rd,1 L. Shih,1 M. Forero,1 Young-Gui Yoon,1 M. S. C. Mazzoni,1 Hyoung Joon Choi,2 Jisoon Ihm,2 Steven G. Louie,1 A. Zettl,1 Paul L. McEuen1*

  20. Applications: Field Emission 1 Samsung prototype carbon nanotube display

  21. Applications: Field Emission 2 Otto Zhou. UNC Physics Cold Cathode X-ray machine The potential advantages of the future CNT X-ray devices are fast response time, programmable xray intensity, programmable spatial distribution (Figure 3), ultra-fine focal spot, rapid pulsation capacity, long lifetime, low energy consumption, miniaturization, and low cost.

  22. Quantum Dots

  23. Microfluidics Polydimethylsiloxane (PDMS)

  24. Myosin V/ Actin Motor

  25. Myosin V

  26. Molecular Motors Use ATP to do Mechanical Work

  27. Advanced Techniques • Scanning ProbeMicroscopy • Lithography

  28. Why Nano now? What has enabled Nanoscience? An incomplete list . . . . • Advances in Computing Power • New Generation of Scientific Instruments • Scanning Probe Microscopes Scanning Tunneling Mic. (STM) Atomic Force Mic. (AFM) Magnetic Force Mic. (MFM) Near Field Scanning Optical Mic. (NSOM) Very Sharp Tip scans over sample surface ATOMIC RESOLUTION

  29. STM, Imaging - Battery + Current Tunneling Current Sample Sample

  30. http://cwx.prenhall.com/bookbind/pubbooks/hillchem3/medialib/media_portfolio/07.htmlhttp://cwx.prenhall.com/bookbind/pubbooks/hillchem3/medialib/media_portfolio/07.html STM images, Examples

  31. Atomic Force Microscopy LASER LASER Detector Computer Mirror Microscope Tip Display Sample Surface scanned back and forth

  32. AFM, (sub)atomic resolution

  33. Nanoguitar Craighead Group, Cornell

  34. What is Nano?? • Nano refers to the scale of nanometers. • This is the scale of molecules, proteins, and other nano-objects that are the topics of this course.

  35. How big is nano? • Nano means one billionth (x 10-9) • Written another way: x 0.000000001 • One nanometer equals 0.000000001 meters (or 0.000000003 feet)

  36. One Nanometer H O H H N H N O O

  37. One Nanometer Water (H20) DNA Small Protein

  38. One Nanometer Water (H20) Carbon Nanotube Quantum Dot

  39. Atoms Molecules What is matter made of?

  40. What are atoms ?How big are they?How well can we “see” them? • Atoms are roughly 2-5 Angstroms in dimension 2-5 * 10 -10 m ~ 1 Ǻ Take a millimeter and divide it into 1000 parts: micron 10-6 m Take one micron and divide it into 1000 parts: nanometer 10-9 m Take one nanometer and divide in 10 parts: angstrom 10-10 m

  41. Protons electrical charge= +e Electrons electrical charge= -e Neutrons Atoms Bohr Model

  42. Electronic Orbitals: The wave mechanical model of atoms

  43. S-Orbital D-Orbital F-Orbital P-Orbital

  44. S-Orbital D-Orbital F-Orbital P-Orbital

  45. Nanoscale Galactic Scale Nano: The Middle Ground “Microscopic” Scale “Macroscopic” Scale Subatomic scale: Nuclear Physics Partical Physics atoms Molecular / Atomic Scale

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