Lecture 27 Nanotechnology

Lecture 27 Nanotechnology - Outline Introduction History...

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Nanotechnology Bruce K. Gale Fundamentals of Micromachining Outline •I n t r o d u c t i o n • History: –R icha rd Feynm an – Development of the field • Uses: – Current applications and methods – Future applications • Research – Nanotubes – Quantum structures • Conclusion Richard Feynman Introduction: Definition • Nanoscience refers to the world as it works on the atomic or molecular scale, from one to several hundred nanometers. • Nanometer = 10 -9 meters: roughly the size of 10 hydrogen atoms lined up or the width
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History: Feynman On Computing “…Why can’t we make them very small, make them of little wires… the wires could be 10 or 100 atoms in diameter, and the circuits could be a few [hundred nanometers] across.” Richard Feynman on computers. Roots of NanoScience • 1981 – SPM (Scanning Probe Microscopes) – Allowed us to image individual atoms – Small tip (a few atoms in size) is held above the conductive surface. Electrons “tunnel” (STM’s) between the probe and surface (by Quantum Mechanics). – The tip is scanned across the surface measuring
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Lecture 27 Nanotechnology - Outline Introduction History...

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