CHEN 1000 Nanotech lecture 4 Notes

CHEN 1000 Nanotech lecture 4 Notes - Announcements...

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1 Announcements • Exam #3: Tuesday evening, 4/22, 7 PM, Coors Event Center (multiple choice as usual) • Exam covers all lectures since Spring Break, and the following chapters: Understanding Biotechnology – 5, 7, 14 Nanotechnology Demystified – 1–4, 6–8 • Monday will be a review class • Tomorrow’s office hours will be 3:30–5 Additional office hours for Mon & Tues will be announced What Can we Learn from Nature about Materials 1. What kind of structures might be useful (e.g. velcro)? 2. How can we manufacture small objects? 3. How can we organize structures in useful ways? Wettability water drop on glass water drop on wax Why the difference? Contact Angle θ C < 90˚ = wetting good for coating processes θ C > 90˚ = non-wetting good to keep surfaces clean Clicker Question What is the approximate contact angle of this drop? A: 20˚ B: 70˚ C: 110˚ D: 160˚ Intermolecular Forces in Water the extensive hydrogen bonding network makes water very stable, very dense, high boiling point, etc A hydrogen atom within one water molecule is attracted to an oxygen atom in a neighboring molecule.
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This note was uploaded on 05/03/2008 for the course CHEN 1000 taught by Professor Degrazia,j during the Spring '04 term at Colorado.

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CHEN 1000 Nanotech lecture 4 Notes - Announcements...

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