Lecture 2 - Intro to Nanotechnology

Lecture 2 - Intro to Nanotechnology - MSE 803:...

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MSE 803: N ANOMATERIALS AND N ANOTECHNOLOGY Professor Xudong Wang 213 MSE Building Spring 2009 Class 2 Introduction to Nanotechnology
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I S N ANOTECHNOLOGY N EW ? N ANOTECHNOLOGY I N N ATURE
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Multiscale ordering, Control of orientation and morphology, Multifunctionality (Ca, P, O) Structure of Seashell
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Diatoms (micro-algae) F. E. Round, R. M. Crawford, D. G. Mann, The Diatoms: Biology and Morphology of the Genera , Cambridge University Press, 1990
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Brittlestars Biomimetic Paths to Photonics Lenses via Brittlestar Skeletons C-axis oriented, single crystal CaCO 3 microlens arrays Nature 424 , 852-855(2003)
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Color on Butterfly Wings Morpho Peleides Butterfly 50 μ m Wing scales on butterfly wings
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Photonic Crystal in Nature tropical orange weevil Pachyrrhynchus congestus pavonius SEM picture of weevil orange rings
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Tokay Gecko 1 cm 1 m m Autumn et al. Nature 405 (2000) 681 Nanotechnology in biology: Foot of a Gecko
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Magnetobacteria Alignment of Magnetic Particles in Nature
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Low cost technique Unique property Self-Cleaning Surfaces
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Suncare lotion (as an example; no advertisement intended) Nanoparticles of Al 2 O 3 , ZnO Nanotechnology in Our Daily Life
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Chinese antiques Gold nanoparticles give red color Nanotechnology in Ancient China In 1857, Au nanoparticles were made (M. Faraday)
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Tools: electron microscopy and scanning probe microscopy: “eyes + hands” Technology and industry need: microelectronics meets challenge Discovery of novel structures, nanocrystals, nanotubes, nanobelts New phenomena and properties: size induced quantum phenomena New understanding: powerful computer simulations and modeling Nanotechnology: Why Now?
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Transmission electron microscopy for atomic-resolution imaging and chemical analysis Magnification: 1.5 million Nanotechnology Advanced Tools
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Lecture 2 - Intro to Nanotechnology - MSE 803:...

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