NFSC 112 Lecture Notes - Lecture 17: Life-Cycle Assessment, Biosensor, National Nanotechnology Initiative

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Nanotechnology is the understanding and control of matter at dimensions of roughly 1 to 100 nanometers, where unique phenomena/property enable novel applications. Encompassing nanoscale science, engineering and technology, nanotechnology involves imaging, measuring, modeling, and manipulating matter at this length scale. A nanometer is one billionth of a meter (10^ -9 m) By breaking the cube into multiple cubes, the amount of surface exposed increases dramatically. Suppose you broke the block into 1 nm squares. How much surface area would be exposed: 1 nm = 1/1,000,000,000 m, 6 x (1/1,000,000,000 m)^2 x 10^729 = 6,000,000,000 m2 = 1,482,632 acres. Surface area larger surface to volume ratio, more surface is available. Unique properties: physical, electrical: conductivity, mechanical: hardness, optical: color, biological: self-organization, bioavailability: adhesive improvement, prolonged gi transit and retention time (chen 2006, High energy approach: high pressure homogenizer, micro uidizer, ultrasonic device. Low energy approach: spontaneous emulsion, phase inversion temperature, phase inversion composition, emulsion inversion point.

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