Subject 2 Characterizing nano-micro structures

Subject 2 Characterizing nano-micro structures - Week (2...

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Week (2 meetings/wk) Contents (wk starting 1/25) Introduction ; Characterizing nanoscale structures (2/1) Processing I : how small features are made; Microfabrication, IC and IC compatible: lithography, deposition, etc. Thermodynamics : effects of small systems, surface energy and curvature, Laplace pressure, melting point depression. (2/8) Kinetics , surface diffusion, surface smoothing, sintering. Mechanical properties of nanostructured materials. (2/15) Nanoporous materials : Au fuel cell and catalysis (Erlebacher); Nanoscale reactive multilayers ; (2/22) Processing II : how the micro/nano structures are made; Nanoparticles ; Self-assembly, functionalized nanostructures, etc. (Searson) (3/1) Electronic properties and devices : scattering, transport, mobility, mean free path, quantum confinement (dots and wells), tunneling, ballistic transport, single-electron transport (3/8) Bio nanosystems properties(Mao); Nano in fluids (Cammarata) (3/15) Spring vacation (3/22) Nanostructures and devices for optical properties (3/29) Magnetic nanostructures/properties (4/5) Student project presentations start (4/12) Student project presentations (4/19) Student project presentations (4/26) Student project presentations
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Subject 2 Structure
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See small things: electron microscopy Problems with optical microscopy Limited resolving power, the ability to separate 2 pts in space Resolution limit ~0.33 μ m for visible light 0 0.61 sin g n a λ = Useful magnification for eye 0.2 mm/0.33 μ m = 600 Limited depth of field (focus); cannot image rough surface
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Use electron waves…… Wave/particle duality For 20 keV e-, λ <0.1 nm 0 h meV λ∝ Useful magnification 0.2 mm/0.1 nm = 2 million
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Scanning Electron Microscope 0 Scan generator controls simultaneous scan;
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Subject 2 Characterizing nano-micro structures - Week (2...

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