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Metallic and Ionic Nanoparticles

Metallic and Ionic Nanoparticles. Extendable Structures: Solids. Nanoparticles. Iron nanoparticles in YOUR backyard?. Types of Solids. Solid Structures. can be. Extendable. Discrete, Molecular-type. or. metallic, ionic, or network solids. molecular solids. Metallic Solids.

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Metallic and Ionic Nanoparticles

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  1. Metallic and Ionic Nanoparticles Extendable Structures: Solids

  2. Nanoparticles Iron nanoparticles in YOUR backyard?

  3. Types of Solids

  4. Solid Structures can be Extendable Discrete, Molecular-type or metallic, ionic, or network solids molecular solids

  5. Metallic Solids

  6. Nanoparticles How are these surface structures different? Metallic Ionic

  7. Nanoparticles How are the attractive forces similar and different? Metallic Ionic

  8. Metallic Solids What physical properties do metals have? High melting/boiling points Ductility Conductivity Luster Malleability Color

  9. Ionic Solids High melting points Nonconductors Brittleness Hard

  10. Metallic Solids Metallic Macroparticles contain moles of atoms Metallic Nanoparticles contain 10-70,000 particles

  11. Metallic Nanoparticles Why is SIZE such a critical factor?

  12. Metallic Nanoparticles As the size of the nanoparticle decreases, • the ratio of surface atoms to interior atoms increases. • the percentage of surface atoms in the sample increases. • the average coordination number in the sample decreases.

  13. Metallic Nanoparticles Did the basic shape of the nanoparticles change?

  14. Metallic Nanoparticles

  15. Metallic Nanoparticles Large number of surface atoms compared to the number of interior atoms

  16. Nanoparticles Professor Christopher Chidsey, Department of Chemistry, Stanford University

  17. Making Connections • What is the effect of particle size on the surface area to volume ratio? • What is the effect of particle size on coordination number? • How do you think surface area to volume ratio relate to surface energy? • What properties could be most effected by surface energy?

  18. Module Flow Chart Lesson 1.1 What is Nanoscience? What is Nanoscience? Examine and Compare size: macro, micro, sub-micro (nano) SI prefixes Lesson 1.2 What Makes Nanoscience so Different? What makes Nanoscience so different? Compare Newtonian and Quantum Chemistry Regimes as they relate to nanoscale science Lesson 1.3 What Makes Nanoscience so Important? Interdisciplinary science The development of new technologies and instrumentation applications whose risk and benefits have yet to be determined Poster Assessment Students will further investigate the essential question that they have considered throughout the module: How and why do the chemical and physical properties of nanosamples differ from those of macrosamples? Lesson 2.1Extendable Solids As the size of the sample decreases the ratio of surface particles to interior particles increases in ionic and metallic solids Lesson 2.2Extendable Solids: Reactivity, Catalysis, Adsorption Lesson 2.3 Extendable Structures: Melting Point, Color Conductivity Lesson 3.1 Carbon Chemistry Lesson 3.2 Fullerenes and Nanotubes

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