Introduction to Nanotechnology Module 6 Atomic and Molecular Structure Material Properties.
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Transcript of Introduction to Nanotechnology Module 6 Atomic and Molecular Structure Material Properties.
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Introduction to Nanotechnology
Module 6
Atomic and Molecular Structure
Material Properties
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Source: Life on Earth biology textbook
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Source: Life on Earth biology textbook
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Source: Life on Earth biology textbook
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Source: Life on Earth biology textbook
![Page 6: Introduction to Nanotechnology Module 6 Atomic and Molecular Structure Material Properties.](https://reader030.fdocuments.in/reader030/viewer/2022032709/56649ec85503460f94bd5a50/html5/thumbnails/6.jpg)
Source: Life on Earth biology textbook
![Page 7: Introduction to Nanotechnology Module 6 Atomic and Molecular Structure Material Properties.](https://reader030.fdocuments.in/reader030/viewer/2022032709/56649ec85503460f94bd5a50/html5/thumbnails/7.jpg)
Source: Life on Earth biology textbook
![Page 8: Introduction to Nanotechnology Module 6 Atomic and Molecular Structure Material Properties.](https://reader030.fdocuments.in/reader030/viewer/2022032709/56649ec85503460f94bd5a50/html5/thumbnails/8.jpg)
Source: Life on Earth biology textbook
![Page 9: Introduction to Nanotechnology Module 6 Atomic and Molecular Structure Material Properties.](https://reader030.fdocuments.in/reader030/viewer/2022032709/56649ec85503460f94bd5a50/html5/thumbnails/9.jpg)
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Crude representation of collagen, cellulose, or a plastic polymer (and many other types of materials)
In reality this molecule is moving. . .•Left and right (stretching)•Wobbling back and forth•Vibrating up and downANDThe individual atoms may be vibrating or moving
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So why don’t materials made out of these types of molecules just fall apart?
Because bonds are formed in between theindividual chains.These bonds provide elasticity, strength and cohesiveness to the structure.
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Types of Unit Cells
• Cubic Unit Cell a = b = c α = β = γ = 900
• Tetragonal a =b ≠ c α = β = γ = 900
Simple
Body Centered
Face Centered
Simple Body Centered
3-4
Source: W.G. Moffatt, G.W. Pearsall, & J. Wulff, “The Structure and Properties of Materials,” vol. I: “Structure,” Wiley, 1964, p. 47.
Figure 3.2
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Types of Unit Cells (Cont.)• Orthorhombic
a ≠ b ≠ c α = β = γ = 900
• Rhombohedral a =b = c α = β = γ ≠ 900
SimpleBase Centered
Face CenteredBody Centered
Simple
3-5
Source: W.G. Moffatt, G.W. Pearsall, & J. Wulff, “The Structure and Properties of Materials,” vol. I: “Structure,” Wiley, 1964, p. 47.
Figure 3.2
![Page 14: Introduction to Nanotechnology Module 6 Atomic and Molecular Structure Material Properties.](https://reader030.fdocuments.in/reader030/viewer/2022032709/56649ec85503460f94bd5a50/html5/thumbnails/14.jpg)
• Hexagonal
a ≠ b ≠ c α = β = γ = 900
• Monoclinic a ≠ b ≠ c α = β = γ = 900
• Triclinic a ≠ b ≠ c α = β = γ = 900
Types of Unit Cells (Cont.)
Simple
Simple
Simple
BaseCentered
3-6
Source: W.G. Moffatt, G.W. Pearsall, & J. Wulff, “The Structure and Properties of Materials,” vol. I: “Structure,” Wiley, 1964, p. 47.
Figure 3.2
![Page 15: Introduction to Nanotechnology Module 6 Atomic and Molecular Structure Material Properties.](https://reader030.fdocuments.in/reader030/viewer/2022032709/56649ec85503460f94bd5a50/html5/thumbnails/15.jpg)
Material Properties• Strength• Elasticity• Rigidity• Hardness• Electrical conductivity• Thermal conductivity
![Page 16: Introduction to Nanotechnology Module 6 Atomic and Molecular Structure Material Properties.](https://reader030.fdocuments.in/reader030/viewer/2022032709/56649ec85503460f94bd5a50/html5/thumbnails/16.jpg)
References• Poole, Charles P., and Frank J. Owens. Introduction to Nanotechnology. Hoboken,
NJ: J. Wiley, 2003.
• Wilson, Michael. Nanotechnology: Basic Science and Emerging Technologies. Boca Raton: Chapman & Hall/CRC, 2002.