Science Saturday --- October 1, 2005 - PowerPoint PPT Presentation

Anita
slide1 l.
Skip this Video
Loading SlideShow in 5 Seconds..
Science Saturday --- October 1, 2005 PowerPoint Presentation
Download Presentation
Science Saturday --- October 1, 2005

play fullscreen
1 / 23
Download Presentation
Science Saturday --- October 1, 2005
138 Views
Download Presentation

Science Saturday --- October 1, 2005

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Science Saturday --- October 1, 2005

  2. IBM chip UMass Logo TI mirror array Nanotechnology Exciting new science and technology for the 21st century

  3. Nanotechnology Is a broad, interdisciplinary topic involving physics, chemistry, biology and engineering It has potential impact in electronics, medicine, materials, and a wide variety of application areas.

  4. Single Hair Width = 0.1 mm How small are nanostructures? = 100 micrometers = 100,000 nanometers ! 1 nanometer = one billionth (10-9) meter

  5. DNA 6,000 nanometers Red blood cell 3 nanometers Smaller still Hair .

  6. How do we make nanostructures? How do we see nanostructures?

  7. First,how do we make nanostructures? • Lithography • Self-assembly

  8. Lithography Mark Tuominen Mark Tuominen

  9. Electron Beam Polymer film Silicon crystal Making a microscopic mask Nanoscopic Mask !

  10. Lithography Patterned Several Times IBM Copper Wiring On a Computer Chip

  11. ~10 nm SELF ASSEMBLY Block “B” Diblock Copolymer Block “A” PS PMMA Scale set by molecular size Ordered Phases 10% A 30% A 50% A 70% A 90% A

  12. BASIC NANOPOROUS TEMPLATE PROCESS APPLICATIONS Deposition Template Etching Mask Remove polymer block within cylinders (UV or ebeam exposure; Acetic acid rinse) Nanoporous Membrane “A versatile, self-assembling, nanoscale lithographic system”

  13. SEM IMAGE OF NANOPOROUS POLYMER TEMPLATE PS/PMMA MW = 42,000 Array Period = 24 nm Pore Diameter = 14 nm

  14. Nanowires Template Transfer Copolymer Template Separations & Sensors Patterned Media Glass Pillars FUNCTIONAL NANOARRAYS NIRT UMass Amherst Devices

  15. 200 nm 100 nm 20 nm unfilled polymer template electrodeposited cobalt nanowires gold silicon NANOWIRE ARRAYS using ELECTRODEPOSITION 1 0 1 1 0 cobalt nanowires • ULTRA-HIGH DENSITY MAGNETIC DATA STORAGE 1.2 trillion wires/in2

  16. LATERALLY-PATTERNED MEDIA vertically-oriented diblock copolymer film NO HOLES “patterned” nanoporous polymer template unexposed region of copolymer film HOLES “patterned” nanowire array

  17. How do we see nanostructures? • A light microscope? • An electron microscope! • A scanning probe microscope!

  18. TV screen eye electron beam electron source Light ! Television Set

  19. Electron Beam DETECTOR SAMPLE Electron Microscope

  20. Surface Scanning probe microscope Vibrating Cantilever

  21. Image of Nickel Atoms

  22. Pushing Atoms Around

  23. Finale